Cleanup listing forWikiProject Arthropods as of February 17, 2026.
Of the 15664 articles in this project 1491 or 10% are marked for cleanup, with 1771 issues in total.
Listings: Alphabetic•By category•CSV•History
| Article | Importance | Class | Count | Oldest | Issues |
|---|---|---|---|---|---|
| 2017 in arthropod paleontology | Low | List | 1 | CS1 errors: periodical ignored | |
| Aaveqaspis | Low | C | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Abacarus hystrix | Low | Start | 1 | October 2020 | Failed verification (October 2020) |
| Abadiellidae | Low | Stub | 1 | January 2025 | Unsourced passages need footnotes {{More citations needed}} (January 2025) |
| Acanthephyra | Low | Stub | 1 | July 2021 | Unsourced passages need footnotes {{citation needed}} (July 2021) |
| Acanthochela | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Acanthochirana | Low | Stub | 1 | 2022 | Potentially dated statements (2022) |
| Acanthodillo | Low | Stub | 1 | January 2026 | Potentially dated statements (January 2026) |
| Acanthogeophilus | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Acanthogeophilus dentifer | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Acanthogeophilus spiniger | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Acanthophrynus | Low | Start | 1 | October 2023 | Clarification needed (October 2023) |
| Acanthosquilla | Low | Stub | 1 | 2018 | Potentially dated statements (2018) |
| Acarapis woodi | Low | Stub | 1 | December 2023 | Unsourced passages need footnotes {{citation needed}} (December 2023) |
| Acariasis | Low | Start | 3 | May 2011 | Cites unreliable sources (May 2011), Unsourced passages need footnotes {{citation needed}} (June 2020, June 2021) |
| Acariformes | Mid | B | 1 | January 2026 | Unsourced passages need footnotes {{citation needed}} (January 2026) |
| Acartia hudsonica | Low | Stub | 1 | September 2018 | Unsourced passages need footnotes {{citation needed}} (September 2018) |
| Acaste (trilobite) | Low | Stub | 1 | CS1 errors: ISBN date | |
| Aceria fraxiniflora | Low | Stub | 1 | March 2023 | Unsourced passages need footnotes {{More citations needed}} (March 2023) |
| Aceria tosichella | Low | Stub | 1 | November 2013 | Page number citations needed (November 2013) |
| Aceria waltheri | Low | Stub | 2 | January 2024 | Potentially dated statements (January 2024), Unsourced passages need footnotes {{citation needed}} (January 2025) |
| Acontheus | Low | Stub | 1 | January 2021 | Too technical (January 2021) |
| Acromares | Low | Stub | 1 | December 2020 | Unsourced passages need footnotes {{More citations needed}} (December 2020) |
| Acromares vittatum | Low | Stub | 1 | December 2020 | Unsourced passages need footnotes {{citation needed}} (December 2020) |
| Actinopus confusus | Low | Stub | 1 | CS1 errors: missing periodical | |
| Actinopus cornelli | Low | Stub | 1 | CS1 errors: missing periodical | |
| Aculops | Low | Stub | 3 | December 2024 | Detailed references needed, Unsourced passages need footnotes {{citation needed}} (December 2024), Vague or ambiguous time (December 2024) |
| Aculops rhois | Low | Stub | 1 | March 2020 | Unsourced passages need footnotes {{citation needed}} (March 2020) |
| Adelophthalmus | Low | GA | 1 | CS1 errors: ISBN date | |
| Adiaphorostreptidae | Low | Stub | 1 | July 2022 | Unsourced passages need footnotes {{More citations needed}} (July 2022) |
| Aega psora | Low | Start | 1 | September 2019 | Dead external links {{dead link}} (September 2019) |
| Aegisthidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Aeglidae | Low | C | 1 | 2013 | Potentially dated statements (2013) |
| Afrauropodidae | Low | Stub | 1 | January 2025 | Orphaned (January 2025) |
| Afrocyclops pauliani | Low | Stub | 1 | April 2025 | Unsourced passages need footnotes {{More citations needed}} (April 2025) |
| Afropolonia | Low | Start | 1 | 2018 | Potentially dated statements (2018) |
| Agapornyssus | Low | Stub | 1 | December 2021 | Orphaned (December 2021) |
| Agastoschizomus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Alaskan king crab fishing | Mid | C | 1 | March 2023 | Unsourced passages need footnotes {{citation needed}} (March 2023) |
| Albertoppelia | Low | Stub | 2 | November 2021 | Unsourced passages need footnotes {{citation needed}} (November 2021), Dead external links {{dead link}} (August 2023) |
| Albunea (crustacean) | Low | Stub | 1 | June 2017 | Dead external links {{dead link}} (June 2017) |
| Alectorobius | Low | Start | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Alima neptuni | Low | Stub | 1 | CS1 errors: missing periodical | |
| Alima pacifica | Low | Stub | 1 | Reference errors | |
| Allan Riverstone McCulloch | Low | Start | 2 | January 2014 | Unsourced passages need footnotes {{More citations needed}} (January 2014), Has general references but lacks inline footnotes (January 2014) |
| Allogalathea elegans | Low | Start | 1 | June 2025 | Factual verification needed (June 2025) |
| Allokoenenia | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Alloschizotaenia bipora | Low | C | 1 | CS1 errors: ISBN date | |
| Alokistocaridae | Low | Start | 1 | CS1 errors: ISBN date | |
| Alomataspis | Low | Stub | 1 | December 2024 | Orphaned (December 2024) |
| Alpheidae | Mid | B | 3 | May 2020 | Unsourced passages need footnotes {{citation needed}} (May 2020, June 2020, March 2024) |
| Alpheus digitalis | Low | Stub | 2 | June 2025 | CS1 errors: missing periodical, Dead external links {{dead link}} (June 2025) |
| Alpheus richardsoni | Low | Start | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Amblyomma americanum | Mid | Start | 2 | February 2021 | Unsourced passages need footnotes {{citation needed}} (February 2021, April 2024) |
| Amblyomma gervaisi | Low | Stub | 1 | CS1 errors: missing periodical | |
| Amblypygi | High | B | 1 | March 2022 | Unsourced passages need footnotes {{citation needed}} (March 2022) |
| Amblyseiulella domatorum | Low | Stub | 1 | November 2022 | Unsourced passages need footnotes {{More citations needed}} (November 2022) |
| Amblyseius | Low | Stub | 2 | October 2025 | Unsourced passages need footnotes {{citation needed}} (October 2025), Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Amblyseius duplicesetus | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Amblyseius filixis | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{More citations needed}} (December 2025) |
| Amblyseius januaricus | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Amblyseius kokufuensis | Low | Stub | 1 | November 2025 | Unsourced passages need footnotes {{More citations needed}} (November 2025) |
| Amblyseius microorientalis | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Amblyseius passiflorae | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Amblyseius perditus | Low | Stub | 1 | June 2024 | Unsourced passages need footnotes {{More citations needed}} (June 2024) |
| Amblyseius siddiqui | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Ambulantactus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Ameiridae | Low | Stub | 1 | May 2024 | Expansion needed (May 2024) |
| American lobster | Mid | B | 3 | April 2019 | Unsourced passages need footnotes {{citation needed}} (April 2019), CS1 errors: periodical ignored, Dead external links {{dead link}} (October 2025) |
| Ammotrecha | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Ammotrechella | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Ammotrechesta | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Ammotrechidae | Low | Start | 1 | September 2022 | Potentially dated statements (September 2022) |
| Ammotrechula | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Ampeliscidae | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Amphibalanus amphitrite | Low | C | 1 | July 2017 | Dead external links {{dead link}} (July 2017) |
| Amphipoda | High | B | 3 | July 2025 | Update needed (July 2025), Expansion needed (July 2025), Introduction cleanup (July 2025) |
| Anagarypus | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Analocostreptus servatius | Low | Stub | 1 | October 2024 | Unsourced passages need footnotes {{citation needed}} (October 2024) |
| Anaulacodithella | Low | Stub | 1 | CS1 errors: ISBN date | |
| Ancorabolidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Ancylomenes | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Andinacaste | Low | Stub | 1 | May 2018 | Unsourced passages need footnotes {{citation needed}} (May 2018) |
| Anepsiozomus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Angelina (trilobite) | Low | Stub | 1 | CS1 errors: ISBN date | |
| Aniculus maximus | Low | Start | 1 | September 2025 | Page number citations needed (September 2025) |
| Anisoditha | Low | Stub | 2 | August 2024 | Orphaned (August 2024), CS1 errors: ISBN date |
| Annameris | Low | Stub | 1 | May 2025 | Unsourced passages need footnotes {{More citations needed}} (May 2025) |
| Anomalocaris | Low | B | 1 | CS1 errors: ISBN date | |
| Antarcticarcinus | Low | Start | 1 | December 2024 | Unsourced passages need footnotes {{More citations needed}} (December 2024) |
| Antenna (zoology) | Mid | C | 1 | January 2021 | Unsourced passages need footnotes {{citation needed}} (January 2021) |
| Antennoseius boskopensis | Low | Stub | 1 | June 2024 | Unsourced passages need footnotes {{More citations needed}} (June 2024) |
| Anthuridae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Antillostenochrus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Antillotrecha | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Antrocarcinus | Low | Stub | 1 | May 2015 | Unsourced passages need footnotes {{More citations needed}} (May 2015) |
| Anuropus | Low | Stub | 1 | 2021 | Potentially dated statements (2021) |
| Anysrius | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Aoridae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Apheloria | Low | C | 1 | CS1 errors: ISBN date | |
| Apheloria corrugata | Low | C | 1 | CS1 errors: ISBN date | |
| Apheloria montana | Low | C | 1 | CS1 errors: ISBN date | |
| Apheloria whiteheadi | Low | C | 1 | CS1 errors: ISBN date | |
| Apherusa | Low | Stub | 1 | July 2021 | Expansion needed (July 2021) |
| Apiomeris | Low | Stub | 1 | May 2025 | Unsourced passages need footnotes {{More citations needed}} (May 2025) |
| Aponileus | Low | Start | 1 | 2021 | Potentially dated statements (2021) |
| Apozomus | Low | Stub | 1 | June 2022 | Potentially dated statements (June 2022) |
| Apseudidae | Low | Stub | 1 | May 2021 | Expansion needed (May 2021) |
| Aptera in the 10th edition of Systema Naturae | Mid | List | 1 | CS1 errors: missing periodical | |
| Aquaculture of brine shrimp | Low | C | 1 | January 2021 | Unsourced passages need footnotes {{citation needed}} (January 2021) |
| Arachnid | Top | B | 2 | March 2016 | Potentially dated statements (March 2016), Unsourced passages need footnotes {{citation needed}} (March 2025) |
| Archopterus | Low | Stub | 1 | January 2024 | Unsourced passages need footnotes {{More citations needed}} (January 2024) |
| Arcitalitrus dorrieni | Low | Start | 1 | September 2025 | Unsourced passages need footnotes {{More citations needed}} (September 2025) |
| Arctinurus | Low | Stub | 1 | May 2019 | Has general references but lacks inline footnotes (May 2019) |
| Arctogeophilus | Low | Start | 1 | CS1 errors: ISBN date | |
| Arctogeophilus inopinatus | Low | Start | 1 | CS1 errors: ISBN date | |
| Arctoseius | Low | Stub | 1 | August 2015 | Unsourced passages need footnotes {{More citations needed}} (August 2015) |
| Arionellus | Low | List | 1 | CS1 errors: ISBN date | |
| Arizona bark scorpion | Low | C | 1 | January 2026 | Unsourced passages need footnotes {{citation needed}} (January 2026) |
| Armadillidium | Mid | Start | 1 | May 2025 | Unsourced passages need footnotes {{citation needed}} (May 2025) |
| Arrenurus | Low | Start | 1 | January 2019 | Incomplete citations (January 2019) |
| Artemia salina | Mid | C | 2 | June 2020 | Unsourced passages need footnotes {{citation needed}} (June 2020), Clarification needed (July 2024) |
| Arthrolycosa | Low | Stub | 1 | March 2016 | Dead external links {{dead link}} (March 2016) |
| Arthropleuridea | Low | C | 1 | October 2013 | Unsourced passages need footnotes {{citation needed}} (October 2013) |
| Arthropod | Top | GA | 3 | April 2012 | Potentially dated statements (April 2012), Failed verification (December 2023), Page number citations needed (January 2024) |
| Arthropod bites and stings | Mid | List | 1 | May 2025 | Unsourced passages need footnotes {{citation needed}} (May 2025) |
| Arthropod exoskeleton | Top | C | 1 | May 2023 | Unsourced passages need footnotes {{citation needed}} (May 2023) |
| Arthropod eye | High | C | 2 | January 2015 | Unsourced passages need footnotes {{citation needed}} (January 2015), Unsourced passages need footnotes {{More citations needed}} (September 2025) |
| Arthropod head problem | Mid | B | 1 | June 2016 | Update needed (June 2016) |
| Arthropod leg | High | C | 7 | December 2017 | Unsourced passages need footnotes {{citation needed}} (December 2017, February 2025, March 2025), Unsourced passages need footnotes {{More citations needed}} (March 2025), Cleanup needed (May 2025, May 2025), Expansion needed (May 2025) |
| Arthropod mouthparts | High | Start | 2 | December 2013 | Unsourced passages need footnotes {{More citations needed}} (December 2013), Clarification needed (July 2025) |
| Asaphida | Low | Start | 1 | December 2024 | Unsourced passages need footnotes {{citation needed}} (December 2024) |
| Asaphidae | Low | Stub | 1 | January 2026 | Unsourced passages need footnotes {{citation needed}} (January 2026) |
| Asaphiscus | Low | Start | 1 | CS1 errors: ISBN date | |
| Asaphus | Low | Start | 2 | September 2017 | Unsourced passages need footnotes {{More citations needed}} (September 2017), CS1 errors: ISBN date |
| Ascoidea (mite) | Low | Stub | 1 | March 2022 | Potentially dated statements (March 2022) |
| Astacidea | Low | Start | 1 | 2009 | Potentially dated statements (2009) |
| Asterocheridae | Low | Stub | 1 | May 2021 | Expansion needed (May 2021) |
| Astigmatina | Low | Start | 1 | CS1 errors: periodical ignored | |
| Atemnidae | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Atlantic horseshoe crab | Mid | B | 2 | March 2015 | Unsourced passages need footnotes {{citation needed}} (March 2015), CS1 errors: archive-url |
| Atlantoscia floridana | Low | Stub | 1 | August 2024 | Factual verification needed (August 2024) |
| Atopomelidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Attenuizomus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Attercopus | Low | C | 1 | January 2025 | Unsourced passages need footnotes {{citation needed}} (January 2025) |
| Aturidae | Low | Stub | 1 | May 2021 | Expansion needed (May 2021) |
| Aulodesmus mossambicus | Low | Stub | 1 | November 2014 | Unsourced passages need footnotes {{citation needed}} (November 2014) |
| Aurivillialepas falcata | Low | Stub | 3 | May 2022 | Categories needed (May 2022), Orphaned (November 2022), Unsourced passages need footnotes {{citation needed}} (June 2024) |
| Austrochernes | Low | Stub | 1 | CS1 errors: ISBN date | |
| Austrochthonius | Low | Stub | 1 | September 2023 | Potentially dated statements (September 2023) |
| Austromarrella | Low | Stub | 1 | December 2024 | Unsourced passages need footnotes {{More citations needed}} (December 2024) |
| Austromegabalanus psittacus | Low | Start | 1 | September 2023 | Dead external links {{dead link}} (September 2023) |
| Austrothelphusa transversa | Low | C | 1 | CS1 errors: periodical ignored | |
| Axiidea | Low | Start | 1 | April 2021 | Disputed statements (April 2021) |
| Axius serratus | Low | Stub | 1 | July 2020 | Dead external links {{dead link}} (July 2020) |
| Baalrog | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Bactrophalangium | Low | Stub | 1 | July 2025 | Dead external links {{dead link}} (July 2025) |
| Bairdiidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Ballophilus braunsi | Low | Stub | 1 | CS1 errors: ISBN date | |
| Ballophilus latisternus | Low | Stub | 1 | July 2021 | Unsourced passages need footnotes {{More citations needed}} (July 2021) |
| Ballophilus peruanus | Low | Stub | 1 | June 2021 | Unsourced passages need footnotes {{More citations needed}} (June 2021) |
| Bamazomus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Barrussus | Low | Stub | 1 | March 2023 | Potentially dated statements (March 2023) |
| Bathynellacea | Low | Stub | 1 | August 2022 | Unsourced passages need footnotes {{citation needed}} (August 2022) |
| Bathyuriscus | Low | Stub | 2 | January 2026 | CS1 errors: ISBN date, Dead external links {{dead link}} (January 2026) |
| Battus (trilobite) | Low | List | 1 | CS1 errors: ISBN date | |
| Beaconella | Low | Stub | 1 | June 2024 | Unsourced passages need footnotes {{More citations needed}} (June 2024) |
| Beaurieuia | Low | Stub | 1 | June 2024 | Orphaned (June 2024) |
| Beecher's Trilobite Bed | Low | C | 1 | September 2025 | Dead external links {{dead link}} (September 2025) |
| Belba | Low | Stub | 1 | January 2023 | Dead external links {{dead link}} (January 2023) |
| Belicenochrus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Belotelson | Low | Stub | 1 | CS1 errors: missing periodical | |
| Bentheuphausia | Low | Start | 1 | October 2016 | Dead external links {{dead link}} (October 2016) |
| Big Sandy crayfish | Low | C | 1 | April 2023 | Factual verification needed (April 2023) |
| Bionychiurus tamilensis | Low | Stub | 1 | CS1 errors: missing periodical | |
| Biton (arachnid) | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Black gill disease | Low | Stub | 1 | October 2022 | Unsourced passages need footnotes {{citation needed}} (October 2022) |
| Black spot disease (crustaceans) | Low | Stub | 1 | August 2024 | Orphaned (August 2024) |
| Blossia | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| BmK NSPK | Low | Start | 1 | June 2024 | Orphaned (June 2024) |
| Bochicidae | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Bolivilaelaps | Low | Stub | 1 | April 2019 | Unsourced passages need footnotes {{More citations needed}} (April 2019) |
| Book lung | Mid | Start | 1 | April 2025 | Unsourced passages need footnotes {{citation needed}} (April 2025) |
| Bothriurus coriaceus | Low | Stub | 1 | April 2016 | Unsourced passages need footnotes {{More citations needed}} (April 2016) |
| Brachydesmus | Low | Start | 1 | CS1 errors: ISBN date | |
| Brachydesmus superus | Low | C | 1 | CS1 errors: ISBN date | |
| Brachypylina | Low | Stub | 1 | CS1 errors: missing periodical | |
| Brachyura | Top | C | 1 | November 2025 | Unsourced passages need footnotes {{More citations needed}} (November 2025) |
| Branchia (arachnid) | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Branchinecta brushi | Low | C | 1 | October 2022 | Unsourced passages need footnotes {{More citations needed}} (October 2022) |
| Branchinecta lynchi | Low | C | 2 | November 2016 | Dead external links {{dead link}} (November 2016), Unsourced passages need footnotes {{citation needed}} (October 2024) |
| Branchinella | Low | Stub | 1 | CS1 errors: missing periodical | |
| Brian Fisher (entomologist) (BLP) | Mid | Stub | 1 | July 2017 | Dead external links {{dead link}} (July 2017) |
| Brine shrimp | Mid | B | 2 | June 2019 | Dead external links {{dead link}} (June 2019), Unsourced passages need footnotes {{citation needed}} (July 2022) |
| Bristolia | Low | Start | 1 | March 2025 | External link cleanup {{external links}} (March 2025) |
| Brongniartella (trilobite) | Low | Start | 1 | CS1 errors: ISBN date | |
| Bryocyclops | Low | Start | 2 | CS1 errors: missing title, CS1 errors: bare URL | |
| Buergerocaris | Low | Stub | 1 | July 2017 | Dead external links {{dead link}} (July 2017) |
| BugGuide | Mid | Start | 1 | November 2018 | Dead external links {{dead link}} (November 2018) |
| Bulbogamasidae | Low | Stub | 1 | May 2021 | Unsourced passages need footnotes {{citation needed}} (May 2021) |
| Bumastus | Low | B | 2 | July 2017 | Dead external links {{dead link}} (July 2017), CS1 errors: ISBN date |
| Bunaia | Low | Stub | 1 | CS1 errors: missing periodical | |
| Burmezomus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Bushizheia | Low | Start | 1 | December 2024 | Unsourced passages need footnotes {{More citations needed}} (December 2024) |
| Buthus occitanus | Low | Stub | 1 | October 2014 | Page number citations needed (October 2014) |
| Bythocytheridae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Cactus cactus | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Calanus | Low | Stub | 1 | April 2025 | Unsourced passages need footnotes {{More citations needed}} (April 2025) |
| Calanus finmarchicus | Low | C | 1 | August 2023 | Unsourced passages need footnotes {{citation needed}} (August 2023) |
| Calappa (crab) | Low | Start | 2 | April 2025 | Unsourced passages need footnotes {{citation needed}} (April 2025), Failed verification (April 2025) |
| Calcinus guamensis | Low | Start | 1 | November 2024 | Categories needed (November 2024) |
| Calcinus hazletti | Low | Stub | 1 | February 2026 | Unsourced passages need footnotes {{More citations needed}} (February 2026) |
| Calcinus revi | Low | Stub | 1 | April 2024 | Rewrite needed (April 2024) |
| Calcinus seurati | Low | Start | 1 | August 2025 | Dead external links {{dead link}} (August 2025) |
| Caligus | Low | Stub | 1 | 2017 | Potentially dated statements (2017) |
| Calima (arachnid) | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Callinectes sapidus | Mid | C | 1 | CS1 errors: missing periodical | |
| Callipodida | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Calmonia | Low | Stub | 1 | May 2018 | Unsourced passages need footnotes {{citation needed}} (May 2018) |
| Calymene | Low | Start | 1 | CS1 errors: ISBN date | |
| Calyptostoma expalpe | Low | Stub | 1 | August 2024 | Orphaned (August 2024) |
| Cambarus | Low | Start | 1 | October 2023 | Unsourced passages need footnotes {{citation needed}} (October 2023) |
| Campodea plusiochaeta | Low | Stub | 1 | November 2023 | Dead external links {{dead link}} (November 2023) |
| Campylaspis | Low | Stub | 1 | October 2019 | Dead external links {{dead link}} (October 2019) |
| Cancer irroratus | Low | Start | 1 | July 2025 | Style editing needed (July 2025) |
| Cancer pagurus | Mid | GA | 1 | November 2023 | Dead external links {{dead link}} (November 2023) |
| Candona | Low | Stub | 1 | July 2020 | Dead external links {{dead link}} (July 2020) |
| Cape lobster | Low | GA | 2 | June 2019 | Dead external links {{dead link}} (June 2019), CS1 errors: periodical ignored |
| Capitulum mitella | Low | Start | 1 | November 2016 | Dead external links {{dead link}} (November 2016) |
| Caprella acanthogaster | Low | Stub | 1 | October 2019 | Dead external links {{dead link}} (October 2019) |
| Caprella linearis | Low | Stub | 1 | CS1 errors: requires URL | |
| Caprella mutica | Low | GA | 4 | June 2019 | Dead external links {{dead link}} (June 2019, October 2019, February 2025), CS1 errors: periodical ignored |
| Carabodes | Low | Stub | 1 | May 2021 | Expansion needed (May 2021) |
| Carcinosoma | Low | GA | 2 | CS1 errors: periodical ignored, CS1 errors: ISBN date | |
| Carcinosomatidae | Low | GA | 2 | CS1 errors: missing periodical, CS1 errors: ISBN date | |
| Carcinus maenas | Mid | GA | 3 | April 2018 | Unsourced passages need footnotes {{citation needed}} (April 2018), Potentially dated statements (2020), Dead external links {{dead link}} (February 2022) |
| Cardisoma armatum | Low | Start | 1 | August 2024 | Unsourced passages need footnotes {{More citations needed}} (August 2024) |
| Caridina dennerli | Low | Start | 1 | October 2025 | Unsourced passages need footnotes {{citation needed}} (October 2025) |
| Caridina glaubrechti | Low | Stub | 1 | CS1 errors: missing periodical | |
| Caridina linduensis | Low | Stub | 1 | November 2018 | Unsourced passages need footnotes {{More citations needed}} (November 2018) |
| Caridina mariae | Low | Stub | 3 | March 2024 | Unsourced passages need footnotes {{More citations needed}} (March 2024), Cites unreliable sources (March 2024), Unsourced passages need footnotes {{citation needed}} (March 2024) |
| Caridina profundicola | Low | Stub | 1 | CS1 errors: missing periodical | |
| Caridina typus | Low | C | 1 | CS1 errors: missing periodical | |
| Caridoid escape reaction | Low | B | 2 | January 2026 | Page number citations needed (January 2026), Unsourced passages need footnotes {{citation needed}} (January 2026) |
| Carolinites | Low | Start | 2 | July 2018 | Original research (July 2018), Unsourced passages need footnotes {{citation needed}} (July 2018) |
| Carpathozercon | Low | Stub | 1 | September 2021 | Unsourced passages need footnotes {{More citations needed}} (September 2021) |
| Catageus | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Caudal ramus | Low | Stub | 1 | November 2020 | Unsourced passages need footnotes {{More citations needed}} (November 2020) |
| Caudoeuraphia | Low | Stub | 1 | August 2024 | Categories needed (August 2024) |
| Cecidophyes rouhollahi | Low | Stub | 1 | January 2025 | Dead external links {{dead link}} (January 2025) |
| Cecidophyopsis ribis | Low | Start | 1 | October 2020 | Unsourced passages need footnotes {{citation needed}} (October 2020) |
| Cedaria | Low | Start | 1 | CS1 errors: ISBN date | |
| Centipede | Top | GA | 1 | December 2025 | Clarification needed (December 2025) |
| Centruroides alayoni | Low | Stub | 1 | February 2024 | Unsourced passages need footnotes {{More citations needed}} (February 2024) |
| Centruroides gracilis | Low | C | 1 | November 2016 | Dead external links {{dead link}} (November 2016) |
| Centruroides jaragua | Low | Stub | 1 | May 2024 | Unsourced passages need footnotes {{More citations needed}} (May 2024) |
| Centruroides limbatus | Low | C | 1 | November 2016 | Dead external links {{dead link}} (November 2016) |
| Centruroides tecomanus | Low | Stub | 1 | November 2018 | Dead external links {{dead link}} (November 2018) |
| Centruroides tuxtla | Low | Stub | 1 | November 2018 | Dead external links {{dead link}} (November 2018) |
| Cephalon (arthropod head) | Mid | Start | 1 | December 2013 | Unsourced passages need footnotes {{More citations needed}} (December 2013) |
| Ceratothoa oestroides | Low | C | 3 | April 2020 | Unsourced passages need footnotes {{citation needed}} (April 2020, January 2026), Unsourced passages need footnotes {{More citations needed}} (January 2026) |
| Ceratozetidae | Low | Stub | 1 | May 2021 | Expansion needed (May 2021) |
| Cercus | Mid | C | 1 | June 2021 | Page number citations needed (June 2021) |
| Cereatta elegans | Low | Stub | 1 | November 2016 | Dead external links {{dead link}} (November 2016) |
| Ceriodaphnia dubia | Low | Stub | 1 | August 2017 | Dead external links {{dead link}} (August 2017) |
| Ceroma (arachnid) | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Ceromella | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Ceromidae | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Chaerilus celebensis | Low | Stub | 1 | July 2020 | Dead external links {{dead link}} (July 2020) |
| Chaetocorophium | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Charinus | Low | Start | 1 | October 2022 | Potentially dated statements (October 2022) |
| Charles Darwin | Low | FA | 1 | CS1 errors: ISBN date | |
| Charon (arachnid) | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Chelaseius brazilensis | Low | Stub | 1 | February 2022 | Unsourced passages need footnotes {{More citations needed}} (February 2022) |
| Chelator (crustacean) | Low | Stub | 1 | June 2024 | Categories needed (June 2024) |
| Chelicerata | Top | GA | 2 | September 2025 | CS1 errors: missing periodical, Unsourced passages need footnotes {{citation needed}} (September 2025) |
| Cheliferidae | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Cheloctonus | Low | Stub | 1 | December 2022 | Unsourced passages need footnotes {{More citations needed}} (December 2022) |
| Cheluridae | Low | Stub | 1 | February 2025 | Dead external links {{dead link}} (February 2025) |
| Chelypus | Low | Start | 1 | February 2023 | Potentially dated statements (February 2023) |
| Cherax | Low | Stub | 2 | May 2021 | Unsourced passages need footnotes {{citation needed}} (May 2021), Clarification needed (November 2021) |
| Cherax depressus | Low | Start | 1 | June 2023 | Unsourced passages need footnotes {{More citations needed}} (June 2023) |
| Cherax quadricarinatus | Low | C | 1 | February 2026 | Unsourced passages need footnotes {{citation needed}} (February 2026) |
| Chernetidae | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Chimerarachne | Low | Start | 1 | 2018 | Potentially dated statements (2018) |
| Chinchippus | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Chinese mitten crab | Mid | C | 3 | July 2020 | Dead external links {{dead link}} (July 2020), Expansion needed (January 2023), Rewrite needed (November 2025) |
| Chionoecetes opilio | Mid | C | 1 | September 2017 | Unsourced passages need footnotes {{citation needed}} (September 2017) |
| Chirocephalus diaphanus | Low | GA | 1 | CS1 errors: ISBN date | |
| Chiromantes haematocheir | Low | Start | 1 | May 2024 | Unsourced passages need footnotes {{citation needed}} (May 2024) |
| Christmas Island red crab | High | C | 2 | November 2019 | Vague or ambiguous time (November 2019), Pages with broken anchors (see article talk page, remove when fixed) |
| Chthamalidae | Low | Start | 1 | March 2014 | Too technical (March 2014) |
| Chthamalus stellatus | Low | C | 1 | CS1 errors: archive-url | |
| Chthonius (arachnid) | Low | Stub | 1 | July 2022 | Potentially dated statements (July 2022) |
| Circumesophageal nerve ring | Low | Start | 2 | May 2018 | Unsourced passages need footnotes {{citation needed}} (May 2018, February 2026) |
| Ciurcalimulus | Low | C | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Clam shrimp | Low | C | 3 | September 2025 | Unsourced passages need footnotes {{More citations needed}} (September 2025), Unsourced passages need footnotes {{citation needed}} (September 2025), Expansion needed (September 2025) |
| Cleidogona fustis | Low | Stub | 1 | June 2024 | Orphaned (June 2024) |
| Cletodidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Clover mite | Low | Start | 1 | February 2019 | Unsourced passages need footnotes {{citation needed}} (February 2019) |
| Cocceupodidae | Low | Stub | 1 | CS1 errors: ISBN date | |
| Cockroaches of the sea | NA | Disambig | 1 | September 2012 | Disputed statements (September 2012) |
| Coconut crab | Mid | GA | 1 | March 2021 | Incomplete citations (March 2021) |
| Coenobita rugosus | Low | Start | 1 | November 2019 | Dead external links {{dead link}} (November 2019) |
| Coenobita spinosus | Low | Stub | 2 | October 2016 | Unsourced passages need footnotes {{More citations needed}} (October 2016), Unsourced passages need footnotes {{citation needed}} (October 2018) |
| Cokendolpherius | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Collophore | Low | Stub | 1 | March 2025 | Unsourced passages need footnotes {{More citations needed}} (March 2025) |
| Common yabby | Mid | C | 5 | November 2016 | Unsourced passages need footnotes {{citation needed}} (November 2016, December 2017, January 2020), Original research (August 2017), Cites unreliable sources (January 2023) |
| Compsaditha | Low | Stub | 1 | CS1 errors: ISBN date | |
| Concavus | Low | Stub | 2 | 2017 | Potentially dated statements (2017, 2021) |
| Conocephalites | Low | List | 1 | CS1 errors: ISBN date | |
| Conocoryphe | Low | Start | 1 | CS1 errors: ISBN date | |
| Conservancy fairy shrimp | Low | Start | 1 | April 2023 | Unsourced passages need footnotes {{citation needed}} (April 2023) |
| Constantine Samuel Rafinesque | Low | C | 2 | October 2020 | Unsourced passages need footnotes {{citation needed}} (October 2020, January 2021) |
| Cordania | Low | Stub | 1 | April 2017 | Unsourced passages need footnotes {{citation needed}} (April 2017) |
| Corynexochina | Low | Stub | 1 | January 2024 | Clarification needed (January 2024) |
| Crab trap | Low | Start | 3 | April 2012 | Limited geographic scope (April 2012), Unsourced passages need footnotes {{citation needed}} (March 2021), Weasel-worded phrases (June 2023) |
| Crangon crangon | Mid | C | 1 | CS1 errors: periodical ignored | |
| Crangonidae | Low | Stub | 1 | CS1 errors: requires URL | |
| Cratoraricrus | Low | C | 1 | December 2025 | Potentially dated statements (December 2025) |
| Crayfish | Top | B | 2 | February 2021 | Unsourced passages need footnotes {{citation needed}} (February 2021, December 2023) |
| Crayfish as food | Mid | C | 1 | April 2024 | Expansion needed (April 2024) |
| Crayfish party | Low | Start | 1 | March 2023 | Unsourced passages need footnotes {{citation needed}} (March 2023) |
| Crepicephalus | Low | Stub | 1 | CS1 errors: ISBN date | |
| Crustacean | Top | GA | 4 | April 2012 | Potentially dated statements (April 2012), Dead external links {{dead link}} (March 2022, October 2022), CS1 errors: periodical ignored |
| Cruziana | Low | Stub | 1 | September 2018 | Unsourced passages need footnotes {{citation needed}} (September 2018) |
| Cryptocellus | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Cryptoditha | Low | Stub | 1 | CS1 errors: ISBN date | |
| Cryptolithus | Low | Stub | 1 | CS1 errors: missing periodical | |
| Ctenocheilocaris | Low | Stub | 1 | September 2023 | Unsourced passages need footnotes {{More citations needed}} (September 2023) |
| Ctenocheilocaris galvarini | Low | Stub | 1 | September 2023 | Unsourced passages need footnotes {{More citations needed}} (September 2023) |
| Ctenorillo | Low | Stub | 2 | CS1 errors: missing title, CS1 errors: bare URL | |
| Cubaris | Low | Stub | 1 | September 2023 | Unsourced passages need footnotes {{citation needed}} (September 2023) |
| Cubazomus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Cumacea | Mid | C | 1 | CS1 errors: periodical ignored | |
| Cyclopicina longifurcata | Low | Start | 1 | December 2024 | Unsourced passages need footnotes {{citation needed}} (December 2024) |
| Cyclops (copepod) | Mid | Start | 2 | October 2024 | Unsourced passages need footnotes {{citation needed}} (October 2024), Unsourced passages need footnotes {{More citations needed}} (November 2024) |
| Cyclothorax | Low | Stub | 1 | August 2021 | Unsourced passages need footnotes {{More citations needed}} (August 2021) |
| Cylindroiulus caeruleocinctus | Low | Stub | 1 | CS1 errors: missing periodical | |
| Cylindropsyllidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Cyliosomatidae | Low | Stub | 1 | July 2025 | Link rot cleanup (July 2025) |
| Cymiphis cymosus | Low | Stub | 1 | August 2025 | Unsourced passages need footnotes {{More citations needed}} (August 2025) |
| Cymothoa elegans | Low | Stub | 2 | June 2025 | Unsourced passages need footnotes {{citation needed}} (June 2025), Unsourced passages need footnotes {{More citations needed}} (June 2025) |
| Cymothoa exigua | Mid | C | 1 | September 2024 | Clarification needed (September 2024) |
| Cyphophthalmus gordani | Low | Stub | 1 | November 2025 | Unsourced passages need footnotes {{More citations needed}} (November 2025) |
| Cypricercus elegans | Low | Stub | 1 | March 2017 | Unsourced passages need footnotes {{More citations needed}} (March 2017) |
| Cyrtodesmidae | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Cyrtodesmus depressus | Low | Start | 1 | CS1 errors: missing periodical | |
| Cystisoma | Mid | Start | 1 | September 2022 | Unsourced passages need footnotes {{citation needed}} (September 2022) |
| Cytheridae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Cytherideidae | Low | Stub | 1 | May 2021 | Expansion needed (May 2021) |
| Cytheruridae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Dactylochelifer | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Daesiidae | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Dala (crustacean) | Low | Stub | 1 | March 2024 | Categories needed (March 2024) |
| Dalmanites | Low | Start | 1 | September 2017 | Dead external links {{dead link}} (September 2017) |
| Damaeidae | Low | Stub | 1 | December 2016 | Unsourced passages need footnotes {{citation needed}} (December 2016) |
| Daphnia | Mid | C | 1 | October 2018 | Unsourced passages need footnotes {{citation needed}} (October 2018) |
| Daphnia pulex | Mid | C | 1 | CS1 errors: ISBN date | |
| Daphnia pulicaria | Low | C | 1 | CS1 errors: periodical ignored | |
| Dardanus venosus | Low | Start | 1 | CS1 errors: missing periodical | |
| Dasylobus argentatus | Low | Stub | 1 | November 2018 | Cites unreliable sources (November 2018) |
| Deathstalker | Low | C | 1 | October 2014 | Unsourced passages need footnotes {{citation needed}} (October 2014) |
| Decapauropus | Low | Start | 1 | CS1 errors: ISBN date | |
| Decapauropus cuenoti | Low | C | 1 | CS1 errors: ISBN date | |
| Decapod anatomy | Mid | C | 2 | April 2025 | Unsourced passages need footnotes {{More citations needed}} (April 2025), Unsourced passages need footnotes {{citation needed}} (May 2025) |
| Deccanometrus bengalensis | Low | Start | 1 | August 2020 | Unsourced passages need footnotes {{citation needed}} (August 2020) |
| Delgadella | Low | Start | 3 | December 2016 | Dead external links {{dead link}} (December 2016), CS1 errors: missing title, CS1 errors: bare URL |
| Deltacephalaspis | Low | Stub | 1 | May 2018 | Unsourced passages need footnotes {{citation needed}} (May 2018) |
| Demodecidae | Low | Stub | 2 | November 2017 | Unsourced passages need footnotes {{More citations needed}} (November 2017), Unsourced passages need footnotes {{citation needed}} (January 2026) |
| Demodex leucogasteri | Low | Stub | 2 | February 2026 | Unsourced passages need footnotes {{More citations needed}} (February 2026), Unsourced passages need footnotes {{citation needed}} (February 2026) |
| Demodicosis | Low | C | 1 | May 2011 | Unsourced passages need footnotes {{More citations needed}} (May 2011) |
| Dendrogaster | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Dendrolaelaps pini | Low | Stub | 1 | January 2025 | Orphaned (January 2025) |
| Dendrolaelaps punctatus | Low | Stub | 1 | September 2021 | Unsourced passages need footnotes {{More citations needed}} (September 2021) |
| Dermacentor andersoni | Low | Start | 1 | November 2018 | Unsourced passages need footnotes {{citation needed}} (November 2018) |
| Dermacentor auratus | Low | Start | 1 | January 2025 | Dead external links {{dead link}} (January 2025) |
| Dermanyssus diphyes | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Dermanyssus gallinae | Low | Start | 1 | 2020 | Potentially dated statements (2020) |
| Derocheilocarididae | Low | C | 1 | December 2022 | Potentially dated statements (December 2022) |
| Desmosoma australis | Low | Stub | 1 | November 2024 | Unsourced passages need footnotes {{More citations needed}} (November 2024) |
| Deuterosminthurus russatus | Low | Stub | 1 | December 2025 | Cites unreliable sources (December 2025) |
| Devillea (millipede) | Low | Start | 1 | CS1 errors: ISBN date | |
| Devillea tuberculata | Low | C | 1 | CS1 errors: ISBN date | |
| Diacyclops uruguayensis | Low | Stub | 1 | January 2025 | Unsourced passages need footnotes {{More citations needed}} (January 2025) |
| Diadasiopus | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Dicranocaris | Low | Stub | 1 | September 2025 | Unsourced passages need footnotes {{citation needed}} (September 2025) |
| Dicranopalpus ramosus | Low | Start | 1 | October 2020 | Has general references but lacks inline footnotes (October 2020) |
| Didrepanon | Low | Stub | 1 | August 2025 | Unsourced passages need footnotes {{More citations needed}} (August 2025) |
| Didymocheliidae | Low | Stub | 1 | September 2025 | Unsourced passages need footnotes {{More citations needed}} (September 2025) |
| Dienstina | Low | Stub | 1 | CS1 errors: ISBN date | |
| Dignathodontidae | Low | Stub | 1 | CS1 errors: ISBN date | |
| Dikelocephalus | Low | C | 2 | May 2016 | Clarification needed (May 2016), CS1 errors: ISBN date |
| Dikerogammarus villosus | Mid | C | 1 | February 2024 | Dead external links {{dead link}} (February 2024) |
| Dinothrombium gigas | Low | Stub | 1 | August 2024 | Unsourced passages need footnotes {{More citations needed}} (August 2024) |
| Diogenes heteropsammicola | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Diplopyge | Low | Stub | 1 | CS1 errors: missing periodical | |
| Dipteropeltis hirundo | Low | Stub | 1 | February 2024 | Dead external links {{dead link}} (February 2024) |
| Dipyrgotes | Low | Stub | 1 | July 2019 | Unsourced passages need footnotes {{More citations needed}} (July 2019) |
| Dirivultidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Ditha | Low | Stub | 1 | CS1 errors: ISBN date | |
| Dithella | Low | Stub | 1 | CS1 errors: ISBN date | |
| Dolichophonus | Low | Stub | 1 | May 2025 | Unsourced passages need footnotes {{citation needed}} (May 2025) |
| Dolichopterus | Low | Start | 1 | CS1 errors: ISBN date | |
| Dongmoa | Low | Stub | 1 | March 2025 | Unsourced passages need footnotes {{citation needed}} (March 2025) |
| Doremataopsis | Low | Stub | 1 | June 2024 | Orphaned (June 2024) |
| Dorphinaxius | Low | Stub | 1 | May 2022 | Dead external links {{dead link}} (May 2022) |
| Dosima fascicularis | Low | C | 1 | CS1 errors: periodical ignored | |
| Draculoides | Low | Start | 1 | September 2023 | Potentially dated statements (September 2023) |
| Draculoides bramstokeri | Low | Stub | 1 | October 2024 | Has general references but lacks inline footnotes (October 2024) |
| Dromiacea | Low | Stub | 1 | May 2021 | Unsourced passages need footnotes {{citation needed}} (May 2021) |
| Drotops | Low | Start | 1 | July 2018 | Unsourced passages need footnotes {{citation needed}} (July 2018) |
| Dulcibella | Low | Start | 3 | June 2025 | Reference cleanup (June 2025), Expansion needed (June 2025), Dead external links {{dead link}} (November 2025) |
| Dungeness crab | Mid | C | 1 | January 2024 | Unsourced passages need footnotes {{citation needed}} (January 2024) |
| Dynoides artocanalis | Low | Stub | 1 | January 2021 | Unsourced passages need footnotes {{More citations needed}} (January 2021) |
| Dynoides barnardii | Low | Stub | 1 | January 2021 | Unsourced passages need footnotes {{More citations needed}} (January 2021) |
| Dynoides globicauda | Low | Stub | 1 | January 2021 | Unsourced passages need footnotes {{More citations needed}} (January 2021) |
| Dynoides longisinus | Low | Stub | 1 | January 2021 | Unsourced passages need footnotes {{More citations needed}} (January 2021) |
| Dynoides spinipodus | Low | Stub | 1 | January 2021 | Unsourced passages need footnotes {{More citations needed}} (January 2021) |
| Dyspanopeus texanus | Low | Start | 2 | April 2023 | Cleanup needed (April 2023, April 2023) |
| Ear mite | High | C | 2 | November 2011 | Cites unreliable sources (November 2011), Page number citations needed (November 2011) |
| Eberlanzia (arachnid) | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Ecdysis | High | C | 2 | May 2024 | Has general references but lacks inline footnotes (May 2024), Unsourced passages need footnotes {{More citations needed}} (May 2024) |
| Echinognathus | Low | GA | 1 | CS1 errors: ISBN date | |
| Ecuadorian hermit crab | Low | Start | 6 | December 2016 | Dead external links {{dead link}} (December 2016, February 2024), Unsourced passages need footnotes {{More citations needed}} (April 2024), Cleanup needed (April 2024, April 2024), Unsourced passages need footnotes {{citation needed}} (December 2024) |
| Edella clava | Low | Stub | 1 | January 2025 | Orphaned (January 2025) |
| Eduard von Martens | Low | Stub | 1 | CS1 errors: missing periodical | |
| Edward J. Miers | Low | C | 1 | August 2025 | Dead external links {{dead link}} (August 2025) |
| Eickwortius | Low | Stub | 1 | November 2022 | Unsourced passages need footnotes {{More citations needed}} (November 2022) |
| Eiconaxius albatrossae | Low | Stub | 1 | February 2024 | Dead external links {{dead link}} (February 2024) |
| Eiconaxius andamanensis | Low | Stub | 1 | February 2024 | Dead external links {{dead link}} (February 2024) |
| Eldredgeops rana | Low | Start | 2 | May 2011 | Unsourced passages need footnotes {{More citations needed}} (May 2011), Unsourced passages need footnotes {{citation needed}} (February 2013) |
| Ellipsocephalus | Low | Stub | 2 | August 2022 | Clarification needed (August 2022), CS1 errors: ISBN date |
| Elrathia | Low | Start | 1 | CS1 errors: ISBN date | |
| Emerita analoga | Low | C | 1 | March 2024 | Page number citations needed (March 2024) |
| Enigmazomus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Enoplometopus antillensis | Low | Stub | 1 | January 2026 | Dead external links {{dead link}} (January 2026) |
| Entocytheridae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Entomaspididae | Low | Start | 1 | CS1 errors: ISBN date | |
| Entomaspis | Low | Stub | 1 | CS1 errors: ISBN date | |
| Entomobrya clitellaria | Low | Stub | 2 | CS1 errors: external links, CS1 errors: generic name | |
| Entomobrya multifasciata | Low | Stub | 1 | CS1 errors: generic name | |
| Entomolepididae | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Entomolithus | Low | List | 1 | CS1 errors: ISBN date | |
| Entomostracites | Low | List | 1 | CS1 errors: ISBN date | |
| Eocarcinosoma | Low | GA | 1 | CS1 errors: ISBN date | |
| Eomonorachus | Low | Stub | 1 | August 2024 | Unsourced passages need footnotes {{More citations needed}} (August 2024) |
| Eophacops | Low | Stub | 1 | CS1 errors: ISBN date | |
| Eosentomon unirecessum | Low | Stub | 1 | March 2021 | Unsourced passages need footnotes {{More citations needed}} (March 2021) |
| Ercaicunia | Low | Stub | 1 | CS1 errors: missing periodical | |
| Eremitione | Low | Start | 1 | April 2025 | Categories needed (April 2025) |
| Eremobates | Low | Stub | 2 | December 2016 | Unsourced passages need footnotes {{citation needed}} (December 2016), Potentially dated statements (January 2023) |
| Eremobates polhemusi | Low | Stub | 1 | CS1 errors: missing periodical | |
| Eremobatidae | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Eremochelis | Low | Stub | 1 | February 2023 | Potentially dated statements (February 2023) |
| Eremocosta | Low | Stub | 1 | February 2023 | Potentially dated statements (February 2023) |
| Eremorhax | Low | Stub | 1 | February 2023 | Potentially dated statements (February 2023) |
| Eremothera (arachnid) | Low | Stub | 1 | February 2023 | Potentially dated statements (February 2023) |
| Erettopterus | Low | GA | 1 | CS1 errors: missing periodical | |
| Ergasilus curticrus | Low | C | 2 | CS1 errors: missing periodical, CS1 errors: ISBN date | |
| Eriophyes inangulis | Low | Start | 1 | February 2026 | Dead external links {{dead link}} (February 2026) |
| Eriorhynchus australicus | Low | Stub | 1 | November 2025 | Dead external links {{dead link}} (November 2025) |
| Eriorhynchus hades | Low | Stub | 1 | November 2025 | Dead external links {{dead link}} (November 2025) |
| Eriorhynchus ramosus | Low | Stub | 1 | November 2025 | Dead external links {{dead link}} (November 2025) |
| Eriorhynchus walteri | Low | Stub | 1 | November 2025 | Dead external links {{dead link}} (November 2025) |
| Eriorhynchus womersleyi | Low | Stub | 1 | November 2025 | Dead external links {{dead link}} (November 2025) |
| Erjiecaris | Low | Stub | 1 | November 2024 | Unsourced passages need footnotes {{citation needed}} (November 2024) |
| Erythraeus passidonicus | Low | Stub | 1 | September 2023 | Orphaned (September 2023) |
| Euastacus bidawalus | Low | C | 1 | CS1 errors: periodical ignored | |
| Eucratonyx | Low | Stub | 1 | CS1 errors: ISBN date | |
| Eucratonyx hamatus | Low | Stub | 1 | CS1 errors: ISBN date | |
| Eucrenonaspides | Low | Start | 1 | May 2022 | Clarification needed (May 2022) |
| Eucytheridae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Eudaniela | Low | Start | 1 | March 2025 | Update needed (March 2025) |
| Eugonatonotus crassus | Low | Stub | 1 | February 2022 | Unsourced passages need footnotes {{More citations needed}} (February 2022) |
| Euidotea durvillei | Low | Stub | 1 | August 2024 | Introduction cleanup (August 2024) |
| Eukoenenia | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Eunephrops bairdii | Low | Stub | 2 | August 2019 | Dead external links {{dead link}} (August 2019), Unsourced passages need footnotes {{More citations needed}} (August 2022) |
| Eunephrops cadenasi | Low | Start | 1 | CS1 errors: periodical ignored | |
| Eupodoidea | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Euraphiinae | Low | Stub | 1 | August 2022 | Orphaned (August 2022) |
| Eurindicus bhugarbha | Low | Stub | 1 | May 2022 | Orphaned (May 2022) |
| Euryparasitidae | Low | Stub | 1 | June 2024 | Orphaned (June 2024) |
| Eurypterus | Low | B | 2 | CS1 errors: missing periodical, CS1 errors: ISBN date | |
| Eusarcana | Low | GA | 2 | November 2024 | CS1 errors: missing periodical, Dead external links {{dead link}} (November 2024) |
| Eusarcus | Low | Stub | 1 | CS1 errors: missing periodical | |
| Euseius consors | Low | Stub | 1 | December 2022 | Unsourced passages need footnotes {{More citations needed}} (December 2022) |
| Euseius mangiferae | Low | Stub | 1 | July 2025 | Unsourced passages need footnotes {{citation needed}} (July 2025) |
| Euseius ricinus | Low | Stub | 1 | September 2022 | Unsourced passages need footnotes {{More citations needed}} (September 2022) |
| Eusimonia | Low | Stub | 1 | March 2023 | Potentially dated statements (March 2023) |
| Eutrombicula alfreddugesi | Low | Stub | 1 | March 2025 | Unsourced passages need footnotes {{citation needed}} (March 2025) |
| Evadne (crustacean) | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Evadne spinifera | Low | Start | 1 | February 2025 | Unsourced passages need footnotes {{citation needed}} (February 2025) |
| Evimirus | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Exigua | Low | Stub | 1 | CS1 errors: ISBN date | |
| Exosphaeroma amplicauda | Low | Start | 1 | August 2024 | Unsourced passages need footnotes {{More citations needed}} (August 2024) |
| Eyestalk ablation | Low | Start | 1 | CS1 errors: periodical ignored | |
| Falconyssus | Low | Stub | 1 | December 2021 | Orphaned (December 2021) |
| Fasciosminthurus quinquefasciatus | Low | Stub | 1 | January 2026 | Orphaned (January 2026) |
| Fattail scorpion | Low | Start | 3 | September 2016 | Unsourced passages need footnotes {{citation needed}} (September 2016), Vague or ambiguous geographic scope (May 2021), Potentially dated statements (October 2025) |
| Faxonius bisectus | Low | Stub | 1 | October 2022 | Unsourced passages need footnotes {{More citations needed}} (October 2022) |
| Faxonius jeffersoni | Low | Stub | 1 | October 2022 | Unsourced passages need footnotes {{More citations needed}} (October 2022) |
| Faxonius limosus | Low | Stub | 1 | November 2025 | Unsourced passages need footnotes {{citation needed}} (November 2025) |
| Feaella | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Feaellidae | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Fenner A. Chace Jr. | Low | Start | 1 | May 2024 | Introduction cleanup (May 2024) |
| Ferrandia | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Fissilicreagris | Low | Stub | 1 | July 2022 | Potentially dated statements (July 2022) |
| Floracarus perrepae | Low | Stub | 1 | June 2025 | Dead external links {{dead link}} (June 2025) |
| Florea sinuata | Low | Stub | 1 | CS1 errors: missing periodical | |
| Florida stone crab | Mid | C | 6 | May 2021 | Unsourced passages need footnotes {{citation needed}} (May 2021, September 2025), Clarification needed (September 2025), Factual verification needed (September 2025), Unsourced passages need footnotes {{More citations needed}} (September 2025), Disputed statements (September 2025) |
| Floridobolus | Low | Start | 1 | October 2025 | Dead external links {{dead link}} (October 2025) |
| Frederick Hutton (scientist) | Low | C | 1 | February 2024 | Dead external links {{dead link}} (February 2024) |
| Freshwater crab | Mid | C | 1 | CS1 errors: periodical ignored | |
| Freshwater prawn farming | Low | C | 2 | November 2022 | Dead external links {{dead link}} (November 2022, May 2024) |
| Friesea | Low | Stub | 1 | May 2024 | Expansion needed (May 2024) |
| Fritzolenellus | Low | Start | 1 | January 2017 | Dead external links {{dead link}} (January 2017) |
| Gagrellenna | Low | Stub | 1 | September 2025 | Unsourced passages need footnotes {{More citations needed}} (September 2025) |
| Galatheidae | Low | Stub | 1 | November 2022 | Unsourced passages need footnotes {{More citations needed}} (November 2022) |
| Galeodes | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Galeodes arabs | Low | Stub | 1 | February 2025 | Has general references but lacks inline footnotes (February 2025) |
| Galeodidae | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Galeodopsis | Low | Stub | 1 | February 2023 | Potentially dated statements (February 2023) |
| Gamasellus plumatilis | Low | Stub | 1 | November 2024 | Unsourced passages need footnotes {{More citations needed}} (November 2024) |
| Gamasellus villosus | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Gamasholaspis browningi | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Gamasodes | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Gamasolaelaps whartoni | Low | Stub | 1 | April 2024 | Unsourced passages need footnotes {{More citations needed}} (April 2024) |
| Gammarus | Low | Start | 1 | May 2024 | Dead external links {{dead link}} (May 2024) |
| Gammarus roeseli | Low | Stub | 1 | March 2021 | Unsourced passages need footnotes {{citation needed}} (March 2021) |
| Garypidae | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Garypinidae | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Garypus | Low | Stub | 1 | CS1 errors: ISBN date | |
| Gaucha (arachnid) | Low | Stub | 1 | January 2023 | Potentially dated statements (January 2023) |
| Gecarcinus nobilii | Low | Stub | 1 | December 2024 | Unsourced passages need footnotes {{citation needed}} (December 2024) |
| Gelyella | Mid | Start | 1 | January 2017 | Dead external links {{dead link}} (January 2017) |
| Genevievella | Low | Start | 1 | CS1 errors: ISBN date | |
| Geogarypidae | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Geogarypus | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Geograpsus lividus | Low | C | 1 | CS1 errors: missing periodical | |
| Geophilus arenarius | Low | Stub | 1 | CS1 errors: ISBN date | |
| Geophilus brunneus | Low | Start | 1 | CS1 errors: ISBN date | |
| Geophilus claremontus | Low | Stub | 1 | CS1 errors: ISBN date | |
| Geophilus duponti | Low | Stub | 1 | CS1 errors: ISBN date | |
| Geophilus flavus | Low | C | 1 | CS1 errors: generic name | |
| Geophilus gavoyi | Low | Stub | 1 | February 2022 | Categories needed (February 2022) |
| Geophilus proximus | Low | Start | 1 | CS1 errors: missing periodical | |
| George Stewardson Brady | Low | Stub | 1 | August 2025 | Dead external links {{dead link}} (August 2025) |
| Geosesarma dennerle | Low | Start | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Geosesarma hagen | Low | Start | 5 | October 2024 | Has general references but lacks inline footnotes (October 2024, January 2026), Unsourced passages need footnotes {{citation needed}} (January 2026), Weasel-worded phrases (January 2026), Unsourced passages need footnotes {{More citations needed}} (January 2026) |
| Geosesarma rouxi | Low | Stub | 1 | December 2024 | Categories needed (December 2024) |
| Gerastos | Low | Stub | 1 | July 2018 | Unsourced passages need footnotes {{citation needed}} (July 2018) |
| Gerdesiidae | Low | Stub | 1 | January 2026 | Unsourced passages need footnotes {{More citations needed}} (January 2026) |
| Gertrud Theiler | Low | Start | 1 | December 2019 | Dead external links {{dead link}} (December 2019) |
| Ghatiana pulchra | Low | Start | 1 | November 2022 | Unsourced passages need footnotes {{More citations needed}} (November 2022) |
| Giant Laotian harvestman | Low | Stub | 3 | 2012 | Potentially dated statements (2012), Unsourced passages need footnotes {{More citations needed}} (May 2015), Update needed (June 2023) |
| Giant isopod | Mid | B | 2 | May 2019 | Unsourced passages need footnotes {{citation needed}} (May 2019, February 2026) |
| Gigantione | Low | Stub | 1 | April 2019 | Unsourced passages need footnotes {{More citations needed}} (April 2019) |
| Gigantometrus swammerdami | Low | Stub | 1 | December 2022 | Unsourced passages need footnotes {{citation needed}} (December 2022) |
| Gilvossius tyrrhenus | Low | C | 1 | October 2024 | Update needed (October 2024) |
| Giuseppe Colosi | Low | Stub | 1 | December 2017 | Dead external links {{dead link}} (December 2017) |
| Glomeris connexa | Low | Stub | 1 | December 2022 | Dead external links {{dead link}} (December 2022) |
| Gluviopsis | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Gluviopsona | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Glycacaridae | Low | Stub | 1 | February 2023 | Unsourced passages need footnotes {{More citations needed}} (February 2023) |
| Glycyphagus | Low | Stub | 1 | CS1 errors: ISBN date | |
| Glyphanoetus | Low | Stub | 1 | CS1 errors: ISBN date | |
| Glyptonotus antarcticus | Low | Start | 2 | August 2025 | Clarification needed (August 2025), Update needed (August 2025) |
| Gnathophyllum | Low | Stub | 1 | March 2022 | Unsourced passages need footnotes {{More citations needed}} (March 2022) |
| Gnosippus | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Goneplax rhomboides | Low | C | 1 | March 2017 | Dead external links {{dead link}} (March 2017) |
| Gonibregmatus | Low | Stub | 1 | CS1 errors: ISBN date | |
| Gonibregmatus plurimipes | Low | Start | 1 | CS1 errors: ISBN date | |
| Gourretiidae | Low | Stub | 1 | January 2025 | Update needed (January 2025) |
| Grapsus grapsus | Low | C | 1 | January 2021 | Unsourced passages need footnotes {{citation needed}} (January 2021) |
| Gribble | Low | C | 1 | June 2025 | Clarification needed (June 2025) |
| Gulf ghost crab | Low | C | 1 | CS1 errors: ISBN date | |
| Gustav Budde-Lund | Low | Stub | 1 | January 2016 | Unsourced passages need footnotes {{citation needed}} (January 2016) |
| Gylippidae | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Gylippus (arachnid) | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Haberma tingkok | Low | C | 1 | September 2023 | Dead external links {{dead link}} (September 2023) |
| Hadogenes troglodytes | Low | Stub | 1 | July 2022 | Unsourced passages need footnotes {{citation needed}} (July 2022) |
| Hadrurus arizonensis | Low | Start | 1 | November 2025 | Unsourced passages need footnotes {{More citations needed}} (November 2025) |
| Haemaphysalis hispanica | Low | Stub | 1 | March 2016 | Has general references but lacks inline footnotes (March 2016) |
| Halolaelapidae | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Halolaelaps | Low | Stub | 1 | March 2024 | Unsourced passages need footnotes {{More citations needed}} (March 2024) |
| Halolaelaps areolatus | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Halolaelaps balticus | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Halolaelaps celticus | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Halolaelaps coxalis | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Halolaelaps fallax | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Halolaelaps marinus | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Halolaelaps saproincisus | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Halolaelaps sculpturatus | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Halolaelaps sexclavatus | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Halolaelaps simplex | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Halolaelaps strenzkei | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Halolaelaps subtilis | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Halotydeus | Low | Stub | 1 | CS1 errors: missing periodical | |
| Halozercon | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Hansenochrus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Haploditha | Low | Stub | 1 | CS1 errors: ISBN date | |
| Harpetida | Low | Start | 1 | March 2014 | Unsourced passages need footnotes {{More citations needed}} (March 2014) |
| Harpiliopsis | Low | Stub | 1 | December 2023 | Unsourced passages need footnotes {{citation needed}} (December 2023) |
| Harriet Richardson | Low | C | 1 | CS1 errors: missing title | |
| Harry Hoogstraal | Low | Start | 1 | CS1 errors: periodical ignored | |
| Hartford H. Keifer | Mid | Start | 1 | November 2017 | Unsourced passages need footnotes {{More citations needed}} (November 2017) |
| Harveyus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Hastimima | Low | Stub | 1 | CS1 errors: ISBN date | |
| Hefriga | Low | Stub | 1 | March 2017 | Dead external links {{dead link}} (March 2017) |
| Heikegani | Low | Start | 1 | June 2019 | Unsourced passages need footnotes {{citation needed}} (June 2019) |
| Helleria brevicornis | Low | Start | 1 | CS1 errors: missing periodical | |
| Hemerotrecha | Low | Stub | 1 | February 2023 | Potentially dated statements (February 2023) |
| Hemiblossia | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Hemigrapsus oregonensis | Low | Start | 1 | CS1 errors: URL | |
| Hemigrapsus sanguineus | Low | C | 1 | October 2025 | Dead external links {{dead link}} (October 2025) |
| Hemiscorpius lepturus | Low | C | 1 | April 2022 | Unsourced passages need footnotes {{citation needed}} (April 2022) |
| Hemisquilla | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Hemisquilla australiensis | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Hemisquilla braziliensis | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Hemisquilla californiensis | Low | C | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Hemisquilla ensigera | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Hemolymph | Mid | Start | 1 | December 2016 | Page number citations needed (December 2016) |
| Henia vesuviana | Low | Start | 1 | January 2025 | Categories needed (January 2025) |
| Henri Milne-Edwards | Low | Start | 1 | February 2023 | Cites unreliable sources (February 2023) |
| Henry Augustus Pilsbry | Low | C | 1 | CS1 errors: ISBN date | |
| Hepatopancreas | Low | Start | 1 | February 2026 | Expansion needed (February 2026) |
| Herefordopterus | Low | GA | 1 | CS1 errors: missing periodical | |
| Heterolophus | Low | Stub | 1 | CS1 errors: ISBN date | |
| Heterometrus laoticus | Low | Stub | 2 | October 2018 | Unsourced passages need footnotes {{citation needed}} (October 2018, March 2024) |
| Heteromurus nitidus | Low | Stub | 1 | December 2025 | Dead external links {{dead link}} (December 2025) |
| Heterosaccus | Low | Stub | 1 | 2017 | Potentially dated statements (2017) |
| Heteroschizomus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Heterosminthurus | Low | Stub | 1 | June 2024 | Orphaned (June 2024) |
| Heterosquilla | Low | Stub | 1 | September 2021 | Unsourced passages need footnotes {{More citations needed}} (September 2021) |
| Heterozius | Low | Stub | 1 | December 2024 | Has general references but lacks inline footnotes (December 2024) |
| Hexapodidae | Low | Start | 1 | December 2019 | Unsourced passages need footnotes {{citation needed}} (December 2019) |
| Hexisopodidae | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Hexisopus | Low | Stub | 1 | March 2023 | Potentially dated statements (March 2023) |
| Hippa adactyla | Low | Start | 1 | January 2020 | Dead external links {{dead link}} (January 2020) |
| Hirsutiidae | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Hobbseus | Low | Stub | 1 | November 2017 | Dead external links {{dead link}} (November 2017) |
| Hoffmanina | Low | Stub | 1 | July 2022 | Unsourced passages need footnotes {{More citations needed}} (July 2022) |
| Holistophallidae | Low | Stub | 1 | January 2026 | Unsourced passages need footnotes {{More citations needed}} (January 2026) |
| Homalonotus | Low | Stub | 1 | February 2020 | Cites unreliable sources (February 2020) |
| Homarus | Low | C | 2 | May 2025 | CS1 errors: periodical ignored, Dead external links {{dead link}} (May 2025) |
| Homola barbata | Low | Start | 1 | April 2017 | Dead external links {{dead link}} (April 2017) |
| Honduriella | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Honduriella maxima | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Hoplitaspis | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Hoplophthiracarus | Low | Stub | 1 | July 2021 | Incomplete lists (July 2021) |
| Horribates | Low | Stub | 2 | February 2023 | Potentially dated statements (February 2023), CS1 errors: ISBN date |
| Horribates bantai | Low | Stub | 1 | CS1 errors: ISBN date | |
| House dust mite | High | C | 1 | March 2024 | Unsourced passages need footnotes {{citation needed}} (March 2024) |
| Hubbardia (arachnid) | Low | Stub | 1 | June 2022 | Potentially dated statements (June 2022) |
| Hubbardiidae | Low | Start | 1 | September 2022 | Potentially dated statements (September 2022) |
| Huffaker's mite experiment | Low | C | 1 | November 2015 | Weasel-worded phrases (November 2015) |
| Hughmilleriidae | Low | GA | 1 | CS1 errors: missing periodical | |
| Human uses of arthropods | Mid | C | 2 | 2008 | Potentially dated statements (2008), Dead external links {{dead link}} (September 2023) |
| Human uses of scorpions | Low | C | 1 | CS1 errors: generic name | |
| Huntonia | Low | Stub | 1 | February 2024 | Orphaned (February 2024) |
| Hurdia | Low | Start | 1 | May 2025 | Expansion needed (May 2025) |
| Hydryphantidae | Low | Stub | 1 | CS1 errors: missing periodical | |
| Hyidae | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Hymenosomatidae | Low | Stub | 1 | January 2020 | Dead external links {{dead link}} (January 2020) |
| Hypoctonus | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Hypostome (tick) | Low | Stub | 1 | February 2022 | Unsourced passages need footnotes {{More citations needed}} (February 2022) |
| Ibacus alticrenatus | Low | C | 2 | July 2025 | CS1 errors: periodical ignored, Dead external links {{dead link}} (July 2025) |
| Ibacus peronii | Low | C | 1 | July 2025 | Dead external links {{dead link}} (July 2025) |
| Iciliidae | Low | Stub | 1 | June 2021 | Unsourced passages need footnotes {{citation needed}} (June 2021) |
| Icriocarcinus | Low | Stub | 1 | July 2025 | Dead external links {{dead link}} (July 2025) |
| Ideoblothrus | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Idmonarachne | Low | Start | 1 | August 2022 | Unsourced passages need footnotes {{More citations needed}} (August 2022) |
| Illacme plenipes | Mid | Start | 1 | September 2024 | Dead external links {{dead link}} (September 2024) |
| Ilyocryptidae | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Ilyoplax | Low | Stub | 1 | January 2020 | Dead external links {{dead link}} (January 2020) |
| Incertasquilla | Unknown | Start | 1 | April 2025 | Categories needed (April 2025) |
| Incultus brockii | Low | Stub | 1 | August 2024 | Orphaned (August 2024) |
| Indian prawn | Mid | C | 1 | CS1 errors: missing periodical | |
| Indohya | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Inodesmus urbanus | Low | Stub | 1 | January 2025 | Categories needed (January 2025) |
| Instar | Mid | Start | 1 | February 2023 | Weasel-worded phrases (February 2023) |
| International Society of Arachnology | Low | Start | 1 | September 2012 | Unsourced passages need footnotes {{citation needed}} (September 2012) |
| Ione (crustacean) | Low | Stub | 1 | September 2024 | Unsourced passages need footnotes {{More citations needed}} (September 2024) |
| Iphinoe trispinosa | Low | Start | 1 | January 2020 | Dead external links {{dead link}} (January 2020) |
| Irmaos | Low | Stub | 1 | December 2024 | Orphaned (December 2024) |
| Isabel Pérez Farfante | Low | C | 1 | June 2018 | Unsourced passages need footnotes {{More citations needed}} (June 2018) |
| Isometrus kovariki | Low | Stub | 1 | CS1 errors: missing periodical | |
| Isopoda | High | FA | 2 | August 2025 | Clarification needed (August 2025), Unsourced passages need footnotes {{citation needed}} (September 2025) |
| Isotelus | Low | GA | 1 | September 2025 | Unsourced passages need footnotes {{citation needed}} (September 2025) |
| Isotoma viridis | Low | Stub | 1 | September 2024 | Dead external links {{dead link}} (September 2024) |
| Ityphilus microcephalus | Low | Stub | 1 | CS1 errors: ISBN date | |
| Ixodes hexagonus | Low | Stub | 1 | September 2014 | Unsourced passages need footnotes {{More citations needed}} (September 2014) |
| Ixodes holocyclus | Low | B | 1 | April 2021 | Clarification needed (April 2021) |
| Ixodes kaiseri | Low | Stub | 1 | February 2026 | Dead external links {{dead link}} (February 2026) |
| Ixodes microgalei | Low | Start | 1 | December 2015 | Has general references but lacks inline footnotes (December 2015) |
| Ixodes scapularis | Mid | C | 2 | April 2024 | Unsourced passages need footnotes {{citation needed}} (April 2024), Dead external links {{dead link}} (February 2026) |
| Ixodidae | High | C | 2 | February 2024 | Unsourced passages need footnotes {{citation needed}} (February 2024), Potentially dated statements (2025) |
| Ixodorhynchidae | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Jacques Forest | Low | Start | 1 | September 2025 | Introduction cleanup (September 2025) |
| Janetschekbrya | Low | Stub | 1 | September 2025 | Dead external links {{dead link}} (September 2025) |
| Japanese spider crab | Mid | B | 1 | November 2024 | Unsourced passages need footnotes {{More citations needed}} (November 2024) |
| Japanese spiny lobster | Low | Stub | 1 | November 2021 | Unsourced passages need footnotes {{citation needed}} (November 2021) |
| Jasus edwardsii | Mid | C | 1 | October 2024 | Unsourced passages need footnotes {{More citations needed}} (October 2024) |
| Jasus frontalis | Low | Start | 2 | November 2025 | CS1 errors: periodical ignored, Dead external links {{dead link}} (November 2025) |
| Jasus lalandii | Low | Start | 1 | Pages with broken anchors (see article talk page, remove when fixed) | |
| Jean Abel Gruvel | Low | Start | 1 | December 2025 | Dead external links {{dead link}} (December 2025) |
| Jianshania | Low | Stub | 1 | CS1 errors: missing periodical | |
| Joanellia | Low | Stub | 1 | February 2020 | Dead external links {{dead link}} (February 2020) |
| Jochen Martens (BLP) | Unknown | B | 1 | CS1 errors: periodical ignored | |
| Joel W. Martin (BLP) | Low | Start | 3 | December 2010 | Unsourced passages need footnotes {{citation needed}} (December 2010), BLP articles lacking sources (December 2010), CS1 errors: missing periodical |
| Johann Friedrich von Brandt | Low | Start | 1 | March 2023 | Dead external links {{dead link}} (March 2023) |
| Johora singaporensis | Low | C | 1 | November 2017 | Dead external links {{dead link}} (November 2017) |
| Journal of Crustacean Biology | Low | Start | 1 | February 2020 | Dead external links {{dead link}} (February 2020) |
| Julattenius | Low | Stub | 1 | September 2023 | Potentially dated statements (September 2023) |
| Juxtastenopus | Low | C | 1 | CS1 errors: periodical ignored | |
| Kalliapseudidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Kani maranjandu | Low | Stub | 1 | 2021 | Potentially dated statements (2021) |
| Karllangia arenicola | Low | Stub | 1 | October 2015 | Unsourced passages need footnotes {{citation needed}} (October 2015) |
| Karschia (arachnid) | Low | Stub | 1 | January 2023 | Potentially dated statements (January 2023) |
| Karschiidae | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Kasibelinuridae | Low | Stub | 1 | November 2024 | Potentially dated statements (November 2024) |
| Katianna | Low | Stub | 2 | December 2025 | Style editing needed (December 2025), Cites unreliable sources (December 2025) |
| Kawina (trilobite) | Low | Stub | 1 | January 2024 | Unsourced passages need footnotes {{More citations needed}} (January 2024) |
| Kendallina | Low | Start | 1 | CS1 errors: ISBN date | |
| King crab | Mid | C | 2 | May 2025 | Harv and Sfn no-target errors, Potentially dated statements (May 2025) |
| King prawn | NA | Disambig | 1 | April 2022 | Disputed statements (April 2022) |
| Kiwa puravida | Low | Start | 4 | April 2025 | Cleanup needed (April 2025, April 2025), Cites unreliable sources (April 2025), Expansion needed (April 2025) |
| Klausmuelleria | Low | Start | 1 | November 2025 | Has general references but lacks inline footnotes (November 2025) |
| Kliellidae | Low | Stub | 1 | January 2025 | Orphaned (January 2025) |
| Koelga | Low | Stub | 1 | December 2017 | Dead external links {{dead link}} (December 2017) |
| Koeneniodes | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Konrad Thaler | Low | Stub | 1 | February 2020 | Dead external links {{dead link}} (February 2020) |
| Krill | Top | B | 3 | 2013 | Potentially dated statements (2013), Dead external links {{dead link}} (December 2017), Unsourced passages need footnotes {{citation needed}} (January 2026) |
| Krill fishery | Mid | B | 3 | January 2018 | Dead external links {{dead link}} (January 2018), Unsourced passages need footnotes {{citation needed}} (April 2019), Expansion needed (July 2025) |
| Krithidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Kumonga exleyi | Low | Stub | 1 | Taxoboxes with an unrecognised status system | |
| Kupellonura werawera | Low | Stub | 1 | June 2021 | Orphaned (June 2021) |
| Labriscorpio | Low | Stub | 2 | July 2024 | Unsourced passages need footnotes {{More citations needed}} (July 2024), Orphaned (July 2024) |
| Lagynochthonius | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Lampropidae | Low | Stub | 1 | CS1 errors: archive-url | |
| Larry the Lobster | Low | Start | 2 | October 2024 | Pages with broken anchors (see article talk page, remove when fixed), Clarification needed (October 2024) |
| Lateral giant interneuron | Low | Stub | 2 | June 2017 | Has general references but lacks inline footnotes (June 2017), CS1 errors: missing periodical |
| Latreilliidae | Low | Start | 2 | October 2024 | Unsourced passages need footnotes {{More citations needed}} (October 2024), Unsourced passages need footnotes {{citation needed}} (October 2024) |
| Laura (crustacean) | Low | Stub | 1 | June 2021 | Unsourced passages need footnotes {{More citations needed}} (June 2021) |
| Lawrencega | Low | Stub | 1 | March 2023 | Potentially dated statements (March 2023) |
| Lawrencezomus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Lebbeus | Low | Stub | 1 | CS1 errors: missing periodical | |
| Lebbeus groenlandicus | Low | Stub | 1 | March 2020 | Unsourced passages need footnotes {{More citations needed}} (March 2020) |
| Legrandella | Low | Stub | 1 | CS1 errors: missing periodical | |
| Leiobunum vittatum | Low | Stub | 1 | December 2023 | Unsourced passages need footnotes {{citation needed}} (December 2023) |
| Leitneria (mite) | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Lepas hillii | Low | Stub | 1 | August 2024 | Orphaned (August 2024) |
| Lepidurus apus | Low | Start | 1 | April 2016 | Unsourced passages need footnotes {{citation needed}} (April 2016) |
| Lepidurus packardi | Low | C | 1 | February 2020 | Dead external links {{dead link}} (February 2020) |
| Leptarma biju | Low | Stub | 1 | December 2024 | Unsourced passages need footnotes {{citation needed}} (December 2024) |
| Leptastacidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Leptocytheridae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Leptodiaptomus ashlandi | Low | Start | 1 | July 2014 | Too technical (July 2014) |
| Leptodiaptomus minutus | Low | Start | 1 | June 2014 | Unsourced passages need footnotes {{More citations needed}} (June 2014) |
| Leptodiaptomus sicilis | Low | Start | 1 | June 2014 | Unsourced passages need footnotes {{More citations needed}} (June 2014) |
| Leptodora | Mid | C | 1 | February 2020 | Dead external links {{dead link}} (February 2020) |
| Leptograpsodes | Low | Start | 1 | November 2024 | Unsourced passages need footnotes {{citation needed}} (November 2024) |
| Leptokoenenia | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Leptoschendyla | Low | C | 1 | CS1 errors: ISBN date | |
| Lernaeidae | Low | Stub | 1 | May 2021 | Expansion needed (May 2021) |
| Lernaeocera branchialis | Mid | C | 1 | December 2017 | Dead external links {{dead link}} (December 2017) |
| Life stages of mites | Low | Start | 1 | March 2025 | Unsourced passages need footnotes {{More citations needed}} (March 2025) |
| Ligia exotica | Low | C | 1 | December 2017 | Dead external links {{dead link}} (December 2017) |
| Ligia platycephala | Low | Stub | 1 | CS1 errors: missing periodical | |
| Ligidium gadalutsi | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{More citations needed}} (December 2025) |
| Ligidium nantahala | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{More citations needed}} (December 2025) |
| Ligidium pacolet | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{More citations needed}} (December 2025) |
| Ligidium protuberans | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{More citations needed}} (December 2025) |
| Ligidium whiteoak | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{More citations needed}} (December 2025) |
| Limnochares | Low | Stub | 1 | CS1 errors: ISBN date | |
| Limnochares americana | Low | Stub | 1 | CS1 errors: ISBN date | |
| Limnopilos | Low | C | 1 | October 2024 | Unsourced passages need footnotes {{citation needed}} (October 2024) |
| Limnopilos naiyanetri | Low | C | 1 | September 2022 | Unsourced passages need footnotes {{citation needed}} (September 2022) |
| Limnoria | Low | Stub | 1 | May 2021 | Unsourced passages need footnotes {{More citations needed}} (May 2021) |
| Limnoria lignorum | Low | Start | 1 | June 2025 | Expansion needed (June 2025) |
| Limuloides | Low | Stub | 1 | CS1 errors: missing periodical | |
| Linguatulosis | Low | Start | 2 | February 2020 | Dead external links {{dead link}} (February 2020), Unsourced passages need footnotes {{citation needed}} (June 2021) |
| Linopodes | Low | Stub | 1 | CS1 errors: ISBN date | |
| Linotaeniidae | Low | Stub | 1 | CS1 errors: ISBN date | |
| Liocarcinus | Low | Stub | 1 | December 2015 | Unsourced passages need footnotes {{More citations needed}} (December 2015) |
| Liomera supernodosa | Low | Stub | 1 | July 2025 | Categories needed (July 2025) |
| Lipophaga | Low | Stub | 1 | March 2023 | Potentially dated statements (March 2023) |
| Lipothrix | Low | Stub | 1 | March 2021 | Orphaned (March 2021) |
| List of Alpheus species | Low | List | 1 | June 2023 | Potentially dated statements (June 2023) |
| List of Argulidae species | Low | List | 1 | December 2022 | Potentially dated statements (December 2022) |
| List of Cumacea literature | Low | List | 1 | December 2017 | Dead external links {{dead link}} (December 2017) |
| List of Myriapoda species of Ireland | Low | List | 1 | December 2017 | Dead external links {{dead link}} (December 2017) |
| List of Synalpheus species | Low | List | 1 | June 2023 | Potentially dated statements (June 2023) |
| List of U.S. state crustaceans | Low | List | 1 | September 2024 | Potentially dated statements (September 2024) |
| List of arthropods of Qatar | Low | List | 1 | April 2020 | Cites no sources (April 2020) |
| List of carcinologists | Mid | List | 1 | August 2018 | Dead external links {{dead link}} (August 2018) |
| List of crabs of New Zealand | Low | List | 1 | December 2024 | Obsolete information (December 2024) |
| List of diseases spread by arthropods | Mid | List | 1 | December 2023 | Unsourced passages need footnotes {{More citations needed}} (December 2023) |
| List of durian diseases and pests | Low | List | 1 | CS1 errors: generic name | |
| List of ixodid ticks of Sri Lanka | Low | List | 1 | November 2020 | Dead external links {{dead link}} (November 2020) |
| List of mites of Sri Lanka | Low | List | 1 | CS1 errors: URL | |
| Lithodes aotearoa | Low | Start | 1 | Harv and Sfn no-target errors | |
| Lithodes chaddertoni | Low | Stub | 1 | Harv and Sfn no-target errors | |
| Lithodes formosae | Low | Stub | 1 | May 2025 | Unsourced passages need footnotes {{citation needed}} (May 2025) |
| Ljania | Low | Stub | 1 | March 2021 | Orphaned (March 2021) |
| Lloydolithus | Low | Stub | 1 | February 2023 | Unsourced passages need footnotes {{More citations needed}} (February 2023) |
| Lobster | Top | B | 3 | August 2023 | Dead external links {{dead link}} (August 2023), Unsourced passages need footnotes {{citation needed}} (May 2025), Page number citations needed (January 2026) |
| Lobster fishing | Mid | C | 2 | March 2020 | Dead external links {{dead link}} (March 2020), CS1 errors: periodical ignored |
| Lochmanolenellus | Low | C | 1 | May 2017 | Dead external links {{dead link}} (May 2017) |
| Lonchodomas | Low | Stub | 1 | CS1 errors: ISBN date | |
| Longitrichanenteria | Low | Stub | 1 | July 2016 | Unsourced passages need footnotes {{More citations needed}} (July 2016) |
| Lophozozymus pulchellus | Low | Stub | 1 | September 2024 | Unsourced passages need footnotes {{citation needed}} (September 2024) |
| Loxoconchidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Loxorhynchus grandis | Low | C | 1 | CS1 errors: missing periodical | |
| Lubbockiidae | Low | Stub | 2 | September 2023 | Cleanup needed (September 2023, September 2023) |
| Luckia | Low | Start | 1 | CS1 errors: missing periodical | |
| Lusoblothrus | Low | Stub | 1 | CS1 errors: ISBN date | |
| Lyreidus | Low | Stub | 1 | June 2022 | Unsourced passages need footnotes {{More citations needed}} (June 2022) |
| Lysiosquillidae | Low | Stub | 1 | July 2025 | Dead external links {{dead link}} (July 2025) |
| Lysmata amboinensis | Low | B | 1 | October 2025 | Unsourced passages need footnotes {{citation needed}} (October 2025) |
| Lysmata wurdemanni | Low | C | 1 | May 2024 | Introduction cleanup (May 2024) |
| Maaykuyak | Low | Stub | 1 | CS1 errors: missing periodical | |
| Macrobrachium grandimanus | Low | Stub | 1 | November 2021 | Has general references but lacks inline footnotes (November 2021) |
| Macrobrachium jelskii | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Macrobrachium rosenbergii | Mid | C | 1 | February 2026 | Promotional tone (February 2026) |
| Macrobrachium veliense | Low | Stub | 1 | June 2023 | Unsourced passages need footnotes {{More citations needed}} (June 2023) |
| Macrobrachium vollenhoveni | Low | Start | 1 | November 2017 | Unsourced passages need footnotes {{citation needed}} (November 2017) |
| Macrocyprididae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Macrodinychus multispinosus | Low | Stub | 1 | December 2016 | Unsourced passages need footnotes {{More citations needed}} (December 2016) |
| Macrohectopus | Low | C | 1 | May 2025 | Expansion needed (May 2025) |
| Macronicophilus | Low | C | 1 | CS1 errors: ISBN date | |
| Macrophthalmidae | Low | Stub | 1 | January 2023 | Unsourced passages need footnotes {{More citations needed}} (January 2023) |
| Macropodia formosa | Low | Stub | 1 | October 2021 | Unsourced passages need footnotes {{More citations needed}} (October 2021) |
| Macropodia rostrata | Low | C | 3 | October 2024 | Unsourced passages need footnotes {{citation needed}} (October 2024), CS1 errors: ISBN date, Dead external links {{dead link}} (July 2025) |
| Macrosternodesmus | Low | C | 1 | CS1 errors: ISBN date | |
| Macrothricidae | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Maera irregularis | Low | Stub | 1 | June 2021 | Unsourced passages need footnotes {{More citations needed}} (June 2021) |
| Magdalena K. P. Smith Meyer | Low | C | 1 | CS1 errors: periodical ignored | |
| Maiopsis | Low | Stub | 1 | July 2025 | Reference cleanup (July 2025) |
| Malykania | Low | Stub | 1 | May 2022 | Unsourced passages need footnotes {{More citations needed}} (May 2022) |
| Mandible (arthropod mouthpart) | Mid | Start | 1 | December 2013 | Unsourced passages need footnotes {{More citations needed}} (December 2013) |
| Mangrove horseshoe crab | Low | C | 1 | January 2021 | Unsourced passages need footnotes {{citation needed}} (January 2021) |
| Mantis shrimp | High | B | 9 | October 2021 | Expansion needed (October 2021), Clarification needed (July 2024, January 2025), Unsourced passages need footnotes {{citation needed}} (July 2024, December 2024, January 2025, April 2025), Cleanup needed (January 2025, January 2025) |
| Maoriella | Low | Stub | 1 | CS1 errors: ISBN date | |
| Marine shrimp farming | Mid | C | 2 | December 2016 | Dead external links {{dead link}} (December 2016, September 2018) |
| Martin Burkenroad | Low | C | 1 | CS1 errors: periodical ignored | |
| Mary J. Rathbun | Low | C | 1 | CS1 errors: missing periodical | |
| Mastigoproctus | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Mastigoproctus giganteus | Mid | C | 1 | May 2025 | Failed verification (May 2025) |
| Matuta victor | Low | Stub | 1 | December 2024 | Categories needed (December 2024) |
| Maudheimia petronia | Low | Stub | 1 | March 2025 | Categories needed (March 2025) |
| Maxilla (arthropod mouthpart) | Low | C | 1 | February 2025 | Page number citations needed (February 2025) |
| Mayacentrum | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Mayazomus | Low | Stub | 1 | June 2022 | Potentially dated statements (June 2022) |
| Meadowtownella | Low | Stub | 1 | January 2018 | Dead external links {{dead link}} (January 2018) |
| Mecistocephalus lifuensis | Low | C | 1 | CS1 errors: ISBN date | |
| Mecistocephalus zygethus | Low | C | 1 | CS1 errors: ISBN date | |
| Megalograptus | Low | FA | 1 | CS1 errors: ISBN date | |
| Megaschizomus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Megistaspis | Low | B | 2 | CS1 errors: missing title, CS1 errors: ISBN date | |
| Meinertulidae | Low | Stub | 2 | June 2024 | Orphaned (June 2024), Unsourced passages need footnotes {{More citations needed}} (August 2024) |
| Melanoblossia | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Melanoblossiidae | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Menthidae | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Merostomata | Low | Start | 1 | January 2018 | Dead external links {{dead link}} (January 2018) |
| Mesobuthus eupeus | Low | C | 3 | March 2018 | Unsourced passages need footnotes {{citation needed}} (March 2018, April 2021), Unsourced passages need footnotes {{More citations needed}} (March 2018) |
| Mesocheles | Low | Stub | 1 | January 2025 | Orphaned (January 2025) |
| Mesochelifer | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Mesoniscus | Low | C | 1 | January 2018 | Dead external links {{dead link}} (January 2018) |
| Mesonyssoides | Low | Stub | 1 | December 2021 | Orphaned (December 2021) |
| Mesonyssus | Low | Stub | 1 | December 2021 | Orphaned (December 2021) |
| Mesoschendyla picturata | Low | Start | 1 | CS1 errors: ISBN date | |
| Messicobolidae | Low | Stub | 1 | November 2013 | Unsourced passages need footnotes {{More citations needed}} (November 2013) |
| Metacarcinus minutoserratus | Low | Stub | 1 | December 2024 | Categories needed (December 2024) |
| Metajapyx latens | Low | Stub | 1 | February 2023 | Unsourced passages need footnotes {{More citations needed}} (February 2023) |
| Metanephrops boschmai | Low | Start | 1 | CS1 errors: periodical ignored | |
| Metanephrops japonicus | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Metapenaeopsis barbata | Low | Stub | 1 | November 2024 | Reference cleanup (November 2024) |
| Metapenaeus monoceros | Low | C | 1 | November 2019 | Unsourced passages need footnotes {{citation needed}} (November 2019) |
| Metapseudidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Meteoraspis | Low | C | 1 | CS1 errors: ISBN date | |
| Metopograpsus messor | Low | Start | 1 | CS1 errors: URL | |
| Metridia pacifica | Low | Start | 1 | May 2023 | Orphaned (May 2023) |
| Mexistenasellus nulemex | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Michael Tweedie | Low | Stub | 1 | January 2009 | Unsourced passages need footnotes {{More citations needed}} (January 2009) |
| Microarthropods | Mid | Stub | 1 | February 2025 | Has general references but lacks inline footnotes (February 2025) |
| Microbisium | Low | Stub | 1 | CS1 errors: ISBN date | |
| Microbisium parvulum | Low | Stub | 1 | CS1 errors: ISBN date | |
| Microphrys weddelli | Low | Stub | 1 | CS1 errors: missing periodical | |
| Mictocaris | Low | C | 1 | CS1 errors: periodical ignored | |
| Mieridduryn | Low | C | 1 | May 2025 | Clarification needed (May 2025) |
| MilliBase | Low | Stub | 1 | July 2025 | Potentially dated statements (July 2025) |
| Minbosius | Low | Stub | 1 | February 2026 | Orphaned (February 2026) |
| Minuca (crab) | Low | Stub | 1 | May 2021 | Expansion needed (May 2021) |
| Mirocaris | Low | Start | 1 | December 2018 | Unsourced passages need footnotes {{citation needed}} (December 2018) |
| Mitopus | Low | Stub | 1 | April 2025 | Unsourced passages need footnotes {{citation needed}} (April 2025) |
| Moina mongolica | Low | Stub | 1 | February 2022 | Categories needed (February 2022) |
| Mongoliulidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Monocorophium insidiosum | Low | Start | 2 | October 2025 | Unsourced passages need footnotes {{citation needed}} (October 2025), Factual verification needed (October 2025) |
| Monoporeia | Low | C | 1 | November 2025 | Update needed (November 2025) |
| Monstrillidae | Low | Start | 1 | May 2020 | Unsourced passages need footnotes {{citation needed}} (May 2020) |
| Moreiradromia antillensis | Low | Start | 1 | CS1 errors: missing periodical | |
| Multicrustacea | Low | Stub | 3 | April 2020 | Dead external links {{dead link}} (April 2020), Unsourced passages need footnotes {{citation needed}} (December 2023), Expansion needed (December 2023) |
| Mummucia | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Mummuciidae | Low | Stub | 1 | January 2023 | Potentially dated statements (January 2023) |
| Mummucina | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Munidopsis serricornis | Low | Start | 1 | April 2020 | Dead external links {{dead link}} (April 2020) |
| Munnopsidae | Low | Stub | 1 | CS1 errors: missing periodical | |
| Mursiopsis | Low | Stub | 2 | CS1 errors: missing title, CS1 errors: bare URL | |
| Mushroom bodies | Low | Start | 1 | 2021 | Potentially dated statements (2021) |
| Myodocopina | Low | Stub | 1 | September 2018 | Unsourced passages need footnotes {{More citations needed}} (September 2018) |
| Myriapoda | Top | C | 1 | August 2022 | Unsourced passages need footnotes {{citation needed}} (August 2022) |
| Mysidacea | Low | Stub | 1 | February 2018 | Dead external links {{dead link}} (February 2018) |
| N58A | Low | C | 1 | January 2024 | Orphaned (January 2024) |
| Nahual (arachnid) | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Nanahughmilleria | Low | GA | 1 | CS1 errors: periodical ignored | |
| Nanhaipotamon wupingense | Low | Stub | 1 | December 2024 | Categories needed (December 2024) |
| Natatolana neglecta | Low | Stub | 1 | CS1 errors: URL | |
| Nekton | High | Start | 1 | September 2025 | Vague or ambiguous time (September 2025) |
| Nemaspela | Low | Stub | 1 | November 2025 | Unsourced passages need footnotes {{More citations needed}} (November 2025) |
| Nemastomatidae | Low | Start | 1 | August 2025 | Dead external links {{dead link}} (August 2025) |
| Nemastomatinae | Low | Stub | 1 | CS1 errors: missing periodical | |
| Nematocarcinus tenuirostris | Low | Stub | 1 | October 2020 | Orphaned (October 2020) |
| Neobirsteiniamysis inermis | Low | Start | 1 | May 2025 | Style editing needed (May 2025) |
| Neobisiidae | Low | Stub | 1 | November 2023 | Potentially dated statements (November 2023) |
| Neocaridina davidi | Low | C | 1 | October 2018 | Unsourced passages need footnotes {{citation needed}} (October 2018) |
| Neocaridina zhangjiajiensis | Low | Stub | 1 | April 2021 | Unsourced passages need footnotes {{citation needed}} (April 2021) |
| Neoditha | Low | Stub | 1 | CS1 errors: ISBN date | |
| Neogalumna seniczaki | Low | Stub | 1 | April 2022 | Orphaned (April 2022) |
| Neolithodes | Low | Start | 2 | June 2025 | Harv and Sfn no-target errors, Unsourced passages need footnotes {{citation needed}} (June 2025) |
| Neolithodes asperrimus | Low | Start | 1 | Harv and Sfn no-target errors | |
| Neolithodes brodiei | Low | Start | 1 | Harv and Sfn no-target errors | |
| Neolithodes bronwynae | Low | Start | 1 | Harv and Sfn no-target errors | |
| Neolithodes flindersi | Low | Start | 1 | Harv and Sfn no-target errors | |
| Neolithodes grimaldii | Low | C | 1 | May 2025 | Failed verification (May 2025) |
| Neolithodes yaldwyni | Low | Start | 1 | Harv and Sfn no-target errors | |
| Neonyssus | Low | Stub | 1 | December 2021 | Orphaned (December 2021) |
| Neosiro exilis | Low | Stub | 1 | CS1 errors: ISBN date | |
| Neostrengeria perijaensis | Low | Stub | 1 | April 2025 | Unsourced passages need footnotes {{More citations needed}} (April 2025) |
| Neotrombicula fujigmo | Low | C | 1 | 2021 | Potentially dated statements (2021) |
| Neotrombidiidae | Low | Stub | 1 | CS1 errors: ISBN date | |
| Neotrombidium | Low | Stub | 1 | CS1 errors: ISBN date | |
| Neotrypaea californiensis | Low | GA | 1 | February 2018 | Dead external links {{dead link}} (February 2018) |
| Neotyranninyssus | Low | Stub | 1 | December 2021 | Orphaned (December 2021) |
| Nephridium | Low | Start | 1 | September 2025 | Has general references but lacks inline footnotes (September 2025) |
| Nephropides | Low | C | 1 | CS1 errors: periodical ignored | |
| Nephrops norvegicus | Mid | GA | 2 | March 2022 | Failed verification (March 2022), Style editing needed (November 2024) |
| Nephropsis atlantica | Low | C | 1 | CS1 errors: periodical ignored | |
| Nesonyx | Low | Start | 1 | CS1 errors: ISBN date | |
| Nevadella | Low | Start | 1 | January 2026 | Dead external links {{dead link}} (January 2026) |
| Nevadia | Low | Start | 1 | January 2026 | Dead external links {{dead link}} (January 2026) |
| New Zealand pea crab | Low | C | 1 | CS1 errors: periodical ignored | |
| Nichollsia | Low | Stub | 1 | February 2018 | Dead external links {{dead link}} (February 2018) |
| Nicothoe astaci | Low | C | 2 | CS1 errors: missing periodical, CS1 errors: periodical ignored | |
| Northern krill | Low | Stub | 1 | CS1 errors: missing periodical | |
| Nothoaspis reddelli | Low | C | 2 | September 2016 | Introduction cleanup (September 2016), Unsourced passages need footnotes {{citation needed}} (September 2016) |
| Nothopuga | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Notodelphyidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Notoedric mange | Low | C | 2 | January 2020 | CS1 errors: missing periodical, Page number citations needed (January 2020) |
| Notostraca | Mid | B | 1 | CS1 errors: periodical ignored | |
| Notozomus | Low | Stub | 1 | September 2023 | Potentially dated statements (September 2023) |
| Obelagnostus | Low | Stub | 1 | March 2025 | Unsourced passages need footnotes {{More citations needed}} (March 2025) |
| Ocypode | Low | C | 1 | April 2020 | Dead external links {{dead link}} (April 2020) |
| Ocypode africana | Low | C | 1 | October 2018 | Dead external links {{dead link}} (October 2018) |
| Ocypode cursor | Low | C | 2 | April 2020 | Dead external links {{dead link}} (April 2020), CS1 errors: periodical ignored |
| Odontodactylus brevirostris | Low | C | 2 | August 2025 | Unsourced passages need footnotes {{citation needed}} (August 2025, December 2025) |
| Odontodactylus latirostris | Low | Stub | 2 | January 2024 | Categories needed (January 2024), Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Odontodactylus scyllarus | Low | Start | 2 | December 2017 | Unsourced passages need footnotes {{citation needed}} (December 2017, December 2025) |
| Odontopygidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Odonturus dentatus | Low | Stub | 1 | December 2019 | Unsourced passages need footnotes {{citation needed}} (December 2019) |
| Oedignathus | Low | Start | 1 | April 2020 | Dead external links {{dead link}} (April 2020) |
| Oelandocaris | Low | C | 1 | CS1 errors: periodical ignored | |
| Offacolidae | Low | Stub | 1 | April 2025 | Unsourced passages need footnotes {{citation needed}} (April 2025) |
| Ogovea | Low | Start | 1 | CS1 errors: missing periodical | |
| Ogygiocarella | Low | C | 1 | July 2018 | Unsourced passages need footnotes {{citation needed}} (July 2018) |
| Okeanobatidae | Low | Stub | 1 | June 2022 | Unsourced passages need footnotes {{More citations needed}} (June 2022) |
| Okiseius alniseius | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{More citations needed}} (December 2025) |
| Okiseius cowbay | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{More citations needed}} (December 2025) |
| Okiseius eharai | Low | Stub | 1 | May 2021 | Unsourced passages need footnotes {{More citations needed}} (May 2021) |
| Okiseius sikkimensis | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{More citations needed}} (December 2025) |
| Okiseius tibetagramins | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{More citations needed}} (December 2025) |
| Olenelloides | Low | Start | 1 | November 2023 | Dead external links {{dead link}} (November 2023) |
| Olenoides | Low | Start | 1 | CS1 errors: ISBN date | |
| Oligonychus | Low | Start | 1 | January 2026 | Dead external links {{dead link}} (January 2026) |
| Olmecazomus | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Oltacola | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Ommatoiulus moreleti | Low | C | 1 | September 2023 | Unsourced passages need footnotes {{citation needed}} (September 2023) |
| Ommatoiulus sabulosus aimatopodus | Low | Stub | 1 | November 2016 | Unsourced passages need footnotes {{citation needed}} (November 2016) |
| Onchodellus hispani | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{More citations needed}} (December 2025) |
| Oparba | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Oparbella | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Opilioacarus | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Opiliones | High | B | 2 | April 2019 | Unsourced passages need footnotes {{citation needed}} (April 2019, February 2025) |
| Opisthosoma | Mid | Start | 1 | September 2025 | Unsourced passages need footnotes {{citation needed}} (September 2025) |
| Oppiella nova | Low | Stub | 1 | CS1 errors: missing periodical | |
| Oregonia (crab) | Low | Start | 1 | CS1 errors: periodical ignored | |
| Orientzomus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Ornithodoros coriaceus | Low | C | 1 | May 2021 | Has general references but lacks inline footnotes (May 2021) |
| Ornithodoros moubata | Low | Start | 1 | December 2019 | Unsourced passages need footnotes {{citation needed}} (December 2019) |
| Orophe cabinetus | Low | Stub | 1 | October 2024 | Unsourced passages need footnotes {{citation needed}} (October 2024) |
| Orthoporus ornatus | Low | C | 1 | October 2023 | Unsourced passages need footnotes {{citation needed}} (October 2023) |
| Orya barbarica | Low | Stub | 1 | CS1 errors: ISBN date | |
| Orygmaspis | Low | Start | 1 | CS1 errors: ISBN date | |
| Oryidae | Low | Stub | 1 | CS1 errors: ISBN date | |
| Oscar Harger | Low | Stub | 1 | May 2025 | Unsourced passages need footnotes {{More citations needed}} (May 2025) |
| Othoes (arachnid) | Low | Stub | 1 | February 2023 | Potentially dated statements (February 2023) |
| Otostigmus | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Otostigmus multidens | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Ovalipes ocellatus | Low | C | 1 | Harv and Sfn no-target errors | |
| Ovozomus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Oxydesmidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Oziotelphusa hippocastanum | Low | Stub | 1 | CS1 errors: external links | |
| Pacal (arachnid) | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Pachygrapsus minutus | Low | Stub | 2 | February 2026 | Unsourced passages need footnotes {{More citations needed}} (February 2026), Categories needed (February 2026) |
| Pachygrapsus plicatus | Unknown | 1 | February 2026 | Unsourced passages need footnotes {{More citations needed}} (February 2026) | |
| Pachylaelaps karawaiewi | Low | Stub | 1 | August 2024 | Orphaned (August 2024) |
| Pachylaelaps novus | Low | Stub | 1 | August 2024 | Orphaned (August 2024) |
| Pachylaelaps siculus | Low | Stub | 1 | January 2025 | Orphaned (January 2025) |
| Pachylaelaps strigifer | Low | Stub | 1 | January 2025 | Orphaned (January 2025) |
| Pachylaelaps tesselatus | Low | Stub | 1 | May 2024 | Unsourced passages need footnotes {{More citations needed}} (May 2024) |
| Pachylasma laeviscutum | Low | Stub | 1 | May 2022 | Categories needed (May 2022) |
| Pachymerium minutum | Low | C | 1 | CS1 errors: ISBN date | |
| Pachymerium syriacum | Low | Stub | 1 | CS1 errors: ISBN date | |
| Pacifastacus fortis | Low | Start | 2 | September 2025 | Page number citations needed (September 2025), Unsourced passages need footnotes {{citation needed}} (September 2025) |
| Paciphacops | Low | Stub | 1 | January 2026 | Dead external links {{dead link}} (January 2026) |
| Paguridae | Low | Stub | 1 | September 2024 | Update needed (September 2024) |
| Pagurus | Low | Stub | 1 | June 2012 | Potentially dated statements (June 2012) |
| Pagurus hemphilli | Low | C | 1 | January 2026 | Categories needed (January 2026) |
| Pagurus hirsutiusculus | Low | C | 1 | March 2018 | Dead external links {{dead link}} (March 2018) |
| Pahvantia | Low | Start | 1 | May 2025 | Clarification needed (May 2025) |
| Pain in crustaceans | High | B | 1 | February 2021 | Unsourced passages need footnotes {{citation needed}} (February 2021) |
| Palaemon cummingi | Low | Start | 1 | April 2023 | Factual verification needed (April 2023) |
| Palaemon maculatus | Low | Stub | 1 | November 2022 | Unsourced passages need footnotes {{citation needed}} (November 2022) |
| Palaemonidae | Low | Start | 2 | CS1 errors: missing periodical, CS1 errors: periodical ignored | |
| Palaeocharinus | Low | Stub | 1 | CS1 errors: ISBN date | |
| Paleomerus | Low | GA | 1 | September 2024 | Dead external links {{dead link}} (September 2024) |
| Palibythus | Low | C | 2 | April 2020 | Dead external links {{dead link}} (April 2020, July 2025) |
| Palicus gracilis | Low | Stub | 1 | October 2024 | Update needed (October 2024) |
| Palinurina | Low | Start | 1 | December 2024 | Unsourced passages need footnotes {{More citations needed}} (December 2024) |
| Palpigradi | Mid | C | 2 | June 2021 | Unsourced passages need footnotes {{citation needed}} (June 2021), Potentially dated statements (September 2022) |
| Pancrustacea | High | Start | 1 | June 2022 | Update needed (June 2022) |
| Pandalus hypsinotus | Low | Stub | 1 | March 2020 | Unsourced passages need footnotes {{More citations needed}} (March 2020) |
| Pandaridae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Pandinus | Low | C | 1 | July 2025 | Dead external links {{dead link}} (July 2025) |
| Panonychus | Low | Stub | 1 | CS1 errors: ISBN date | |
| Panopeus herbstii | Low | Start | 1 | September 2024 | Unsourced passages need footnotes {{More citations needed}} (September 2024) |
| Panulirus marginatus | Low | Stub | 2 | October 2024 | Unsourced passages need footnotes {{More citations needed}} (October 2024), Unsourced passages need footnotes {{citation needed}} (October 2024) |
| Panulirus ornatus | Low | C | 1 | February 2022 | Unsourced passages need footnotes {{citation needed}} (February 2022) |
| Paracerceis sculpta | Low | C | 1 | April 2020 | Dead external links {{dead link}} (April 2020) |
| Paracrangonyx | Low | Start | 1 | March 2018 | Dead external links {{dead link}} (March 2018) |
| Paradoxides | Low | C | 1 | CS1 errors: ISBN date | |
| Paradoxosomatidae | Low | Stub | 1 | 2013 | Potentially dated statements (2013) |
| Paradoxostomatidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Paragaleodes | Low | Stub | 1 | February 2023 | Potentially dated statements (February 2023) |
| Parakonarus kopure | Low | Stub | 1 | August 2016 | Orphaned (August 2016) |
| Paralithodes platypus | Low | C | 1 | September 2024 | Unsourced passages need footnotes {{citation needed}} (September 2024) |
| Paralomis aspera | Low | Stub | 1 | Harv and Sfn no-target errors | |
| Paralomis dawsoni | Low | Start | 1 | 2023 | Potentially dated statements (2023) |
| Paralomis tuberipes | Low | Start | 1 | 2020 | Potentially dated statements (2020) |
| Paraphrynus | Low | Stub | 1 | January 2017 | Unsourced passages need footnotes {{More citations needed}} (January 2017) |
| Parapinnixa affinis | Low | C | 1 | CS1 errors: archive-url | |
| Paratanaidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Paratanais paraoa | Low | Stub | 1 | July 2016 | Orphaned (July 2016) |
| Paratanais tara | Low | Stub | 1 | August 2016 | Orphaned (August 2016) |
| Paravaejovis spinigerus | Low | Stub | 1 | CS1 errors: missing periodical | |
| Parhippolyte uveae | Low | Start | 1 | CS1 errors: ISBN date | |
| Parobisium | Low | Stub | 1 | July 2024 | Potentially dated statements (July 2024) |
| Parribacus | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Parribacus antarcticus | Low | Stub | 2 | May 2025 | CS1 errors: periodical ignored, Dead external links {{dead link}} (May 2025) |
| Paul Bartsch | Low | C | 3 | December 2023 | CS1 errors: missing periodical, Vague or ambiguous time (December 2023), Unsourced passages need footnotes {{More citations needed}} (February 2025) |
| Peachella | Low | Start | 1 | January 2026 | Dead external links {{dead link}} (January 2026) |
| Pedipalp | Mid | C | 3 | February 2016 | Weasel-worded phrases (February 2016), Unsourced passages need footnotes {{citation needed}} (November 2019), Pages with broken anchors (see article talk page, remove when fixed) |
| Peltidiidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Peltogasterella sulcata | Low | Stub | 1 | May 2022 | Categories needed (May 2022) |
| Peltura | Low | Stub | 1 | October 2025 | Dead external links {{dead link}} (October 2025) |
| Penaeus | Low | Stub | 1 | July 2016 | Disputed statements (July 2016) |
| Penaeus esculentus | Low | C | 1 | March 2018 | Dead external links {{dead link}} (March 2018) |
| Penaeus monodon | Mid | C | 1 | CS1 errors: missing periodical | |
| Peniculisa | Low | Start | 1 | Pages with broken anchors (see article talk page, remove when fixed) | |
| Pentacheles laevis | Low | Stub | 1 | December 2023 | Unsourced passages need footnotes {{More citations needed}} (December 2023) |
| Pentastomida | Mid | B | 3 | May 2021 | CS1 errors: missing periodical, Dead external links {{dead link}} (May 2021), Unsourced passages need footnotes {{citation needed}} (July 2021) |
| Penthaleus major | Low | B | 1 | CS1 errors: ISBN date | |
| Pentidotea kirchanskii | Low | Stub | 1 | December 2024 | Categories needed (December 2024) |
| Peracarida | Low | Stub | 2 | June 2025 | Clarification needed (June 2025), Expansion needed (June 2025) |
| Pergalumna indistincta | Low | Stub | 1 | April 2016 | Orphaned (April 2016) |
| Periclimenes sagittifer | Low | Stub | 2 | April 2020 | Unsourced passages need footnotes {{citation needed}} (April 2020, November 2021) |
| Periglischrodes | Low | Stub | 1 | June 2024 | Orphaned (June 2024) |
| Perisesarma bidens | Low | Stub | 1 | August 2024 | Unsourced passages need footnotes {{citation needed}} (August 2024) |
| Peronopsis | Low | Stub | 1 | CS1 errors: ISBN date | |
| Petrobia | Low | Stub | 1 | CS1 errors: ISBN date | |
| Petrochirus diogenes | Low | Stub | 1 | March 2018 | Dead external links {{dead link}} (March 2018) |
| Phacopidae | Low | Start | 1 | CS1 errors: ISBN date | |
| Phacops | Low | Start | 2 | CS1 errors: periodical ignored, CS1 errors: ISBN date | |
| Phauloppia | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Philipp Franz von Siebold | Low | B | 1 | CS1 errors: ISBN date | |
| Philodanidae | Low | Stub | 1 | February 2026 | Cites no sources (February 2026) |
| Philomedidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Phronima | Low | Stub | 1 | December 2024 | Unsourced passages need footnotes {{citation needed}} (December 2024) |
| Phrynichus (arachnid) | Low | Stub | 1 | CS1 errors: ISBN date | |
| Phrynus longipes | Low | C | 3 | November 2020 | Has general references but lacks inline footnotes (November 2020), Unsourced passages need footnotes {{citation needed}} (March 2021, February 2024) |
| Phytoptidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Piaroa (arachnid) | Low | Stub | 1 | August 2022 | Potentially dated statements (August 2022) |
| Pilarta | Low | Stub | 1 | November 2025 | Unsourced passages need footnotes {{citation needed}} (November 2025) |
| Pilocamptus | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Pinnixa chaetopterana | Low | C | 1 | CS1 errors: periodical ignored | |
| Pirimela | Low | Start | 1 | CS1 errors: ISBN date | |
| Pitfall trap | Mid | Start | 1 | CS1 errors: ISSN | |
| Placoparia | Low | Start | 1 | CS1 errors: ISBN date | |
| Plateremaeidae | Low | Stub | 1 | CS1 errors: ISBN date | |
| Platymaia alcocki | Low | Stub | 3 | March 2021 | Unsourced passages need footnotes {{More citations needed}} (March 2021), Unsourced passages need footnotes {{citation needed}} (March 2021), Categories needed (December 2024) |
| Platyrhacidae | Low | Start | 1 | June 2014 | Incomplete lists (June 2014) |
| Platysquilla | Low | Stub | 1 | March 2018 | Dead external links {{dead link}} (March 2018) |
| Pleistacantha cervicornis | Low | Stub | 1 | July 2025 | Unsourced passages need footnotes {{More citations needed}} (July 2025) |
| Pleistacantha maxima | Low | Stub | 2 | July 2025 | Clarification needed (July 2025), Unsourced passages need footnotes {{More citations needed}} (July 2025) |
| Pleomothra | Low | Stub | 1 | September 2017 | Unsourced passages need footnotes {{citation needed}} (September 2017) |
| Plesionida | Low | Stub | 1 | 2017 | Potentially dated statements (2017) |
| Podocopida | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Podonidae | Low | Stub | 2 | October 2024 | CS1 errors: periodical ignored, Vague or ambiguous geographic scope (October 2024) |
| Pogonognathellus | Low | Stub | 1 | April 2021 | Orphaned (April 2021) |
| Pollicipes pollicipes | Low | C | 1 | March 2018 | Dead external links {{dead link}} (March 2018) |
| Polyascus | Low | Stub | 2 | 2017 | CS1 errors: external links, Potentially dated statements (2017) |
| Polybius zariquieyi | Low | C | 1 | August 2022 | Unsourced passages need footnotes {{More citations needed}} (August 2022) |
| Polychelidae | Low | C | 1 | March 2025 | Has general references but lacks inline footnotes (March 2025) |
| Polydesmus progressus | Low | Start | 1 | CS1 errors: ISBN date | |
| Pontocyprididae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Porcelain crab | Mid | C | 2 | 2018 | Potentially dated statements (2018), Unsourced passages need footnotes {{citation needed}} (October 2022) |
| Porcellidium | Low | Stub | 1 | October 2023 | Categories needed (October 2023) |
| Porcellio laevis | Low | Start | 2 | September 2024 | Unsourced passages need footnotes {{citation needed}} (September 2024), Weasel-worded phrases (September 2024) |
| Porcellionides pruinosus | Low | Stub | 2 | August 2024 | Unsourced passages need footnotes {{More citations needed}} (August 2024), Unsourced passages need footnotes {{citation needed}} (August 2024) |
| Porocephaliasis | Low | Start | 1 | May 2020 | Dead external links {{dead link}} (May 2020) |
| Portunidae | Low | Stub | 1 | March 2025 | Unsourced passages need footnotes {{citation needed}} (March 2025) |
| Portunoidea | Low | Start | 1 | January 2025 | Unsourced passages need footnotes {{citation needed}} (January 2025) |
| Portunus sanguinolentus | Low | Start | 1 | May 2020 | Original research (May 2020) |
| Potamon rhodium | Low | Stub | 1 | July 2024 | Categories needed (July 2024) |
| Potamonautes danielsi | Low | Stub | 1 | October 2024 | Unsourced passages need footnotes {{More citations needed}} (October 2024) |
| Powassan encephalitis | Low | Start | 2 | July 2019 | Unsourced passages need footnotes {{citation needed}} (July 2019, August 2021) |
| Prawn | High | C | 1 | May 2025 | Dead external links {{dead link}} (May 2025) |
| Procambarus alleni | Low | Stub | 1 | July 2017 | Dead external links {{dead link}} (July 2017) |
| Procambarus clarkii | Mid | B | 1 | May 2024 | Unsourced passages need footnotes {{citation needed}} (May 2024) |
| Procambarus fitzpatricki | Low | Stub | 1 | August 2024 | Unsourced passages need footnotes {{citation needed}} (August 2024) |
| Procambarus zonangulus | Low | Start | 1 | August 2024 | Unsourced passages need footnotes {{citation needed}} (August 2024) |
| Prokoenenia | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Prostigmata | Mid | Start | 1 | May 2022 | Potentially dated statements (May 2022) |
| Prostygnidae | Low | Stub | 1 | March 2024 | Unsourced passages need footnotes {{More citations needed}} (March 2024) |
| Protaphorura | Low | Stub | 1 | April 2021 | Orphaned (April 2021) |
| Proteroiulus broelemanni | Low | Stub | 1 | January 2026 | Unsourced passages need footnotes {{More citations needed}} (January 2026) |
| Proteroiulus hispanus | Low | Stub | 1 | January 2026 | Unsourced passages need footnotes {{More citations needed}} (January 2026) |
| Protoschizomus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Protura | High | B | 1 | January 2025 | Page number citations needed (January 2025) |
| Pruvostina | Low | Stub | 1 | August 2023 | Orphaned (August 2023) |
| Psalenoba | Low | Stub | 1 | September 2024 | Unsourced passages need footnotes {{citation needed}} (September 2024) |
| Psammocytheridae | Low | Stub | 1 | January 2025 | Orphaned (January 2025) |
| Pselliodidae | Low | Stub | 1 | 2017 | Potentially dated statements (2017) |
| Pseudamphilochus | Low | Stub | 1 | November 2025 | Orphaned (November 2025) |
| Pseudobourletiella spinata | Low | Stub | 2 | January 2026 | CS1 errors: generic name, Orphaned (January 2026) |
| Pseudocellus | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Pseudocellus mitchelli | Low | Stub | 1 | November 2018 | Has general references but lacks inline footnotes (November 2018) |
| Pseudochactidae | Low | Stub | 1 | December 2022 | Has general references but lacks inline footnotes (December 2022) |
| Pseudocleobis | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Pseudocyclopidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Pseudogygites | Low | Stub | 1 | July 2018 | Unsourced passages need footnotes {{citation needed}} (July 2018) |
| Pseudoniscus | Low | Stub | 1 | CS1 errors: missing periodical | |
| Pseudoscorpion | Top | C | 3 | August 2025 | Pages with broken anchors (see article talk page, remove when fixed), Has general references but lacks inline footnotes (August 2025), Unsourced passages need footnotes {{More citations needed}} (August 2025) |
| Pseudotachidiidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Pseudotyrannochthonius | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Psittonyssus | Low | Stub | 1 | December 2021 | Orphaned (December 2021) |
| Psoroptes | Low | Start | 1 | CS1 errors: missing periodical | |
| Pterygotus | Low | GA | 1 | CS1 errors: ISBN date | |
| Ptilonyssoides | Low | Stub | 1 | December 2021 | Orphaned (December 2021) |
| Ptychoparia | Low | Start | 1 | CS1 errors: ISBN date | |
| Punctodendrolaelaps formicarius | Low | Stub | 1 | September 2016 | Orphaned (September 2016) |
| Purcellinus | Low | Start | 1 | CS1 errors: ISBN date | |
| Pycnodithella | Low | Stub | 1 | CS1 errors: ISBN date | |
| Pygmarrhopalites | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Pyrosejidae | Low | Stub | 1 | February 2026 | Cites no sources (February 2026) |
| Radfordia | Low | Stub | 1 | June 2021 | Unsourced passages need footnotes {{citation needed}} (June 2021) |
| Raillietiella teagueselfi | Low | Start | 1 | May 2023 | Orphaned (May 2023) |
| Rakaia (harvestman) | Low | Start | 1 | September 2024 | Clarification needed (September 2024) |
| Ramellogammarus similimanus | Low | C | 1 | CS1 errors: periodical ignored | |
| Raoiella indica | Low | C | 1 | June 2025 | Dead external links {{dead link}} (June 2025) |
| Raymondinidae | Low | Stub | 1 | CS1 errors: ISBN date | |
| Red king crab | Low | C | 1 | November 2023 | Unsourced passages need footnotes {{More citations needed}} (November 2023) |
| Redlichia | Low | Start | 1 | October 2025 | Unsourced passages need footnotes {{citation needed}} (October 2025) |
| Redlichia chinensis | Low | Stub | 1 | May 2022 | Categories needed (May 2022) |
| Redlichia takooensis | Low | Stub | 1 | February 2026 | Has general references but lacks inline footnotes (February 2026) |
| Redlichiida | Low | Start | 1 | April 2019 | Unsourced passages need footnotes {{More citations needed}} (April 2019) |
| Redlichiina | Low | Start | 1 | May 2019 | Has general references but lacks inline footnotes (May 2019) |
| Relapsing fever | Low | Start | 4 | October 2010 | Unsourced passages need footnotes {{citation needed}} (October 2010, July 2020, May 2021), Accuracy disputes or self-published (September 2025) |
| Repinaella | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Resseropsis | Low | Stub | 1 | May 2021 | Unsourced passages need footnotes {{More citations needed}} (May 2021) |
| Rhagodeca | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Rhagoderma | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Rhagodes | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Rhagodes caucasicus | Low | Stub | 1 | April 2025 | Unsourced passages need footnotes {{citation needed}} (April 2025) |
| Rhagodessa | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Rhagodeya | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Rhagodia (arachnid) | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Rhagodidae | Low | Stub | 1 | November 2022 | Potentially dated statements (November 2022) |
| Rhagodima | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Rhagodinus | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Rhagodira | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Rhagoditta | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Rhagodixa | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Rhagodoca | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Rhagodopa | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Rhagoduna | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Rhinocarcinosoma | Low | GA | 1 | CS1 errors: ISBN date | |
| Rhinosterna | Low | Stub | 1 | December 2021 | Orphaned (December 2021) |
| Rhipicephalus | Low | Stub | 1 | March 2018 | Unsourced passages need footnotes {{citation needed}} (March 2018) |
| Rhipicephalus microplus | Low | Start | 2 | January 2021 | Expansion needed (January 2021), Clarification needed (December 2022) |
| Rhipicephalus sanguineus | High | Start | 1 | 2010 | Potentially dated statements (2010) |
| Rhizocephala | Low | C | 2 | July 2017 | Unsourced passages need footnotes {{citation needed}} (July 2017, October 2024) |
| Rhodacarella | Low | Stub | 1 | June 2024 | Orphaned (June 2024) |
| Ricinoides | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Ricinulei | Mid | C | 1 | September 2022 | Potentially dated statements (September 2022) |
| Rimicaris kairei | Low | C | 3 | April 2025 | Cleanup needed (April 2025, April 2025), Clarification needed (April 2025) |
| Robert Henry Pulleine | Low | Stub | 1 | July 2025 | Unsourced passages need footnotes {{More citations needed}} (July 2025) |
| Ronald A. Ochoa | Low | C | 1 | September 2025 | Unsourced passages need footnotes {{citation needed}} (September 2025) |
| Rostrum (anatomy) | Low | Start | 1 | October 2025 | Unsourced passages need footnotes {{citation needed}} (October 2025) |
| Rowlandius | Low | Start | 1 | June 2022 | Potentially dated statements (June 2022) |
| Rugodentus | Low | Stub | 1 | January 2026 | Orphaned (January 2026) |
| Rutidermatidae | Low | Stub | 1 | December 2024 | Orphaned (December 2024) |
| Sacculina | Low | Start | 1 | September 2019 | Rewrite needed (September 2019) |
| Sahyadrimetrus scaber | Low | Start | 1 | April 2024 | Orphaned (April 2024) |
| Salmon louse | Low | Start | 1 | October 2025 | Style editing needed (October 2025) |
| Salmoneus (crustacean) | Low | Stub | 1 | 2024 | Potentially dated statements (2024) |
| Salterolithus | Low | Stub | 1 | January 2026 | Dead external links {{dead link}} (January 2026) |
| Salteropterus | Low | GA | 1 | CS1 errors: missing periodical | |
| Samoa (harvestman) | Low | Stub | 1 | CS1 errors: external links | |
| Saprosecans | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Saprosecans baloghi | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Saprosecans bialoviensis | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Sarcoptes equi | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Sarcoptes scabiei | High | C | 1 | January 2014 | Unsourced passages need footnotes {{citation needed}} (January 2014) |
| Sarcoptidae | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Sarcotaces | Low | Stub | 1 | May 2021 | Cites unreliable sources (May 2021) |
| Saron (crustacean) | Low | Stub | 1 | 2023 | Potentially dated statements (2023) |
| Saron marmoratus | Low | C | 1 | May 2025 | Dead external links {{dead link}} (May 2025) |
| Sathrochthonius | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Scabies | Mid | B | 2 | July 2020 | Unsourced passages need footnotes {{citation needed}} (July 2020), Pages with broken anchors (see article talk page, remove when fixed) |
| Schendyla dalmatica | Low | C | 1 | CS1 errors: ISBN date | |
| Schendyla nemorensis | Low | Stub | 1 | CS1 errors: ISBN date | |
| Schendylops | Low | Start | 1 | CS1 errors: ISBN date | |
| Schendylops australis | Low | C | 1 | CS1 errors: ISBN date | |
| Schizomus | Low | Stub | 1 | June 2022 | Potentially dated statements (June 2022) |
| Schizomus arganoi | Low | Stub | 1 | August 2024 | Categories needed (August 2024) |
| Schizomus brevicaudus | Low | Stub | 1 | August 2024 | Categories needed (August 2024) |
| Schizomus cambridgei | Low | Stub | 1 | August 2024 | Categories needed (August 2024) |
| Schizomus cereus | Low | Stub | 1 | June 2022 | Orphaned (June 2022) |
| Schizomus crassicaudatus | Low | Stub | 1 | August 2024 | Categories needed (August 2024) |
| Schizophyxia | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Schmalenseeia | Low | Start | 1 | CS1 errors: requires URL | |
| Scillaelepas | Low | Stub | 1 | May 2024 | Categories needed (May 2024) |
| Scolecitrichidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Scolopendra angulata | Low | Stub | 1 | CS1 errors: missing periodical | |
| Scolopendra dawydoffi | Low | Start | 1 | August 2022 | Cites unreliable sources (August 2022) |
| Scolopendra viridicornis | Low | Stub | 1 | March 2025 | Original research (March 2025) |
| Scorpionism in Central America | Low | B | 1 | May 2020 | Orphaned (May 2020) |
| Scutacaridae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Scutigera aethiopica | Low | Stub | 1 | June 2025 | Has general references but lacks inline footnotes (June 2025) |
| Scutigeromorpha | Low | C | 1 | November 2024 | Page number citations needed (November 2024) |
| Scyllarus | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Scyllarus pygmaeus | Low | C | 1 | CS1 errors: periodical ignored | |
| Scyphax ornatus | Low | Stub | 1 | November 2024 | Orphaned (November 2024) |
| Sea louse | Mid | B | 1 | CS1 errors: periodical ignored | |
| Sea spider | High | C | 1 | March 2015 | Page number citations needed (March 2015) |
| Sebidae | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Sechelleptus | Low | Stub | 1 | May 2024 | Categories needed (May 2024) |
| Selenopeltis | Low | Stub | 1 | January 2018 | Unsourced passages need footnotes {{More citations needed}} (January 2018) |
| Semadiscus | Low | Stub | 1 | February 2016 | Weasel-worded phrases (February 2016) |
| Seminellogon bituberculosus | Low | Start | 1 | CS1 errors: missing periodical | |
| Sensiphorura | Low | Stub | 1 | April 2024 | Categories needed (April 2024) |
| Sensiphorura tiunovi | Low | Stub | 1 | April 2024 | Categories needed (April 2024) |
| Senticaudata | Mid | Stub | 1 | June 2025 | Expansion needed (June 2025) |
| Sesarmops | Low | Start | 1 | November 2023 | Categories needed (November 2023) |
| Sessilia | Low | Stub | 1 | July 2019 | Page number citations needed (July 2019) |
| Seychellum | Low | GA | 1 | February 2026 | Dead external links {{dead link}} (February 2026) |
| Shrimp | Top | B | 6 | April 2018 | Dead external links {{dead link}} (April 2018, May 2025), CS1 errors: periodical ignored, Update needed (March 2025), Cleanup needed (September 2025, September 2025) |
| Shrimp and prawn as food | Low | C | 1 | April 2025 | Rewrite needed (April 2025) |
| Shrimp farming | Low | Start | 1 | October 2012 | Potentially dated statements (October 2012) |
| Shrimp paste | Low | C | 4 | April 2019 | Unsourced passages need footnotes {{citation needed}} (April 2019, February 2021, March 2021), Clarification needed (January 2022) |
| Sicyonia brevirostris | Low | Start | 1 | October 2024 | Cites unreliable sources (October 2024) |
| Sicyonia ingentis | Low | C | 1 | May 2017 | Dead external links {{dead link}} (May 2017) |
| Simple eye in invertebrates | Mid | C | 1 | April 2024 | Clarification needed (April 2024) |
| Siriella | Low | Stub | 1 | CS1 errors: external links | |
| Siriocaris | Low | Start | 1 | January 2025 | Unsourced passages need footnotes {{More citations needed}} (January 2025) |
| Sminthuridae | Low | Stub | 1 | April 2025 | Unsourced passages need footnotes {{citation needed}} (April 2025) |
| Sminthurus mencenbergae | Low | Stub | 2 | CS1 errors: missing title, CS1 errors: bare URL | |
| Sminthurus viridis | Low | Start | 2 | February 2017 | Unsourced passages need footnotes {{citation needed}} (February 2017, April 2025) |
| Soft-shell crab | Low | Stub | 1 | August 2023 | Unsourced passages need footnotes {{citation needed}} (August 2023) |
| Solifugae | High | B | 5 | 2009 | Potentially dated statements (2009), Clarification needed (September 2016), Unsourced passages need footnotes {{citation needed}} (February 2019, July 2025), Expansion needed (July 2025) |
| Solpuga | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Solpugassa | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Solpugeira | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Solpugella | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Solpugiba | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Solpugidae | Low | Stub | 1 | January 2025 | Potentially dated statements (January 2025) |
| Solpugista | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Solpuguna | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Solpugyla | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Sororoditha | Low | Stub | 1 | CS1 errors: ISBN date | |
| Sotanostenochrus | Low | Stub | 1 | January 2026 | Potentially dated statements (January 2026) |
| Spelaeoniscidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Sphaeridia | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Sphaeriodesmus filamentosus | Low | Stub | 1 | July 2023 | Unsourced passages need footnotes {{More citations needed}} (July 2023) |
| Sphaerolaelaps holothyroides | Low | Stub | 1 | October 2022 | Orphaned (October 2022) |
| Sphaerolichidae | Low | Stub | 1 | February 2026 | Cites no sources (February 2026) |
| Sphaeroma taborans | Low | Stub | 1 | March 2025 | Unsourced passages need footnotes {{More citations needed}} (March 2025) |
| Sphaeroma terebrans | Low | C | 1 | June 2024 | Page number citations needed (June 2024) |
| Spider | Top | GA | 2 | 2025 | Potentially dated statements (2025, January 2026) |
| Spider anatomy | Mid | B | 2 | June 2024 | CS1 errors: missing periodical, Has general references but lacks inline footnotes (June 2024) |
| Spider mite | Mid | C | 2 | January 2023 | Clarification needed (January 2023), Dead external links {{dead link}} (March 2025) |
| Spinocalanidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Spiny lobster | Mid | Start | 1 | CS1 errors: periodical ignored | |
| Spiny lobster culture in Vietnam | Mid | C | 1 | March 2018 | Unsourced passages need footnotes {{citation needed}} (March 2018) |
| Spirobolellus praslinus | Low | Stub | 1 | July 2024 | Unsourced passages need footnotes {{More citations needed}} (July 2024) |
| Squamacula | Low | Stub | 1 | February 2020 | Page number citations needed (February 2020) |
| Squat lobster | Mid | B | 1 | February 2026 | Too technical (February 2026) |
| Squilla | Low | Stub | 4 | September 2025 | Style editing needed (September 2025), Factual verification needed (September 2025), Update needed (September 2025), Unsourced passages need footnotes {{citation needed}} (September 2025) |
| Squilla mantis | Low | C | 3 | May 2018 | Dead external links {{dead link}} (May 2018, August 2025), Unsourced passages need footnotes {{citation needed}} (August 2025) |
| Stanko Karaman | Low | Stub | 1 | June 2025 | Unsourced passages need footnotes {{More citations needed}} (June 2025) |
| Statocyst | Low | Start | 1 | June 2022 | Unsourced passages need footnotes {{citation needed}} (June 2022) |
| Stenasellus stygopersicus | Low | Stub | 1 | February 2026 | Cites unreliable sources (February 2026) |
| Steneotarsonemus laticeps | Low | Stub | 1 | January 2023 | Dead external links {{dead link}} (January 2023) |
| Stenochrus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Stenoniodes | Low | Start | 1 | October 2025 | Orphaned (October 2025) |
| Stenotaenia asiaeminoris | Low | C | 1 | CS1 errors: ISBN date | |
| Sternophoridae | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Sternophysinx | Low | Stub | 1 | May 2025 | Orphaned (May 2025) |
| Sternostomoides | Low | Stub | 1 | December 2021 | Orphaned (December 2021) |
| Stomatogastric nervous system | Low | Start | 1 | November 2014 | Has general references but lacks inline footnotes (November 2014) |
| Strabopidae | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Strabops | Low | GA | 2 | September 2024 | Dead external links {{dead link}} (September 2024), CS1 errors: ISBN date |
| Stratiolaelaps scimitus | Low | Start | 1 | January 2021 | Unsourced passages need footnotes {{More citations needed}} (January 2021) |
| Strigamia maritima | Low | C | 2 | October 2025 | Original research (October 2025), Style editing needed (October 2025) |
| Strongylosoma asiaeminoris | Low | Stub | 1 | March 2025 | Categories needed (March 2025) |
| Strongylosoma bisulcatum | Low | Stub | 1 | March 2025 | Categories needed (March 2025) |
| Stygophalangium karamani | Low | Stub | 1 | January 2024 | Unsourced passages need footnotes {{citation needed}} (January 2024) |
| Styloniscus | Low | Stub | 1 | 2010 | Potentially dated statements (2010) |
| Subgenual organ | Low | Start | 1 | November 2019 | Unsourced passages need footnotes {{citation needed}} (November 2019) |
| Subparmatus | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Suctobelbidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Suidasiidae | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Sunellidae | Low | Start | 1 | Reference errors | |
| Surazomus | Low | Stub | 1 | June 2022 | Potentially dated statements (June 2022) |
| Syarinidae | Low | Stub | 1 | CS1 errors: ISBN date | |
| Sylon hippolytes | Low | Stub | 2 | March 2025 | Unsourced passages need footnotes {{citation needed}} (March 2025), Unsourced passages need footnotes {{More citations needed}} (March 2025) |
| Symphypleona | Low | Start | 1 | July 2020 | Unsourced passages need footnotes {{citation needed}} (July 2020) |
| Symphysops | Low | Start | 1 | February 2026 | Unsourced passages need footnotes {{More citations needed}} (February 2026) |
| Syncaris pacifica | Low | B | 1 | April 2023 | Unsourced passages need footnotes {{citation needed}} (April 2023) |
| Synopiidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Tachypleini | Low | Stub | 1 | January 2024 | Unsourced passages need footnotes {{More citations needed}} (January 2024) |
| Tagma (biology) | Mid | Start | 2 | October 2013 | Has general references but lacks inline footnotes (October 2013), Dead external links {{dead link}} (April 2023) |
| Tamara Mkheidze | Low | Stub | 1 | June 2019 | Unsourced passages need footnotes {{More citations needed}} (June 2019) |
| Tanaopsis rawhitia | Low | Stub | 1 | April 2016 | Orphaned (April 2016) |
| Tantulocarida | Low | Start | 2 | June 2018 | Expansion needed (June 2018, November 2024) |
| Tanymastix stagnalis | Low | B | 1 | June 2018 | Dead external links {{dead link}} (June 2018) |
| Tarabulida | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Tardisia | Low | Start | 1 | January 2025 | Unsourced passages need footnotes {{More citations needed}} (January 2025) |
| Tasmanian giant freshwater crayfish | Mid | B | 1 | CS1 errors: archive-url | |
| Tectoporus | Low | Stub | 1 | May 2021 | Expansion needed (May 2021) |
| Telodeinopus aoutii | Low | Start | 2 | April 2024 | Rewrite needed (April 2024), Unsourced passages need footnotes {{citation needed}} (April 2024) |
| Telson | Mid | Start | 1 | August 2014 | Clarification needed (August 2014) |
| Tenuipalpus | Low | Stub | 1 | November 2018 | Unsourced passages need footnotes {{citation needed}} (November 2018) |
| Terrestricythere | Low | Stub | 2 | June 2019 | Potentially dated statements (June 2019), Orphaned (November 2024) |
| Tetragonicipitidae | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Tetrapachylasma arcuatum | Low | Stub | 1 | May 2022 | Categories needed (May 2022) |
| Tetrapulmonata | Low | Start | 1 | March 2016 | Potentially dated statements (March 2016) |
| Texella reddelli | Low | C | 1 | March 2019 | Unsourced passages need footnotes {{citation needed}} (March 2019) |
| Thaerocytheridae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Thalassinidea | Low | Start | 1 | October 2024 | Dead external links {{dead link}} (October 2024) |
| Thalestridae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Thelyphonellus | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Thelyphonida | Low | C | 1 | September 2025 | Potentially dated statements (September 2025) |
| Thelyphonus | Low | Start | 1 | October 2022 | Potentially dated statements (October 2022) |
| Thelyphonus sepiaris | Low | Start | 1 | April 2024 | Unsourced passages need footnotes {{citation needed}} (April 2024) |
| Thenus | Low | Start | 1 | CS1 errors: periodical ignored | |
| Thermosphaeroma thermophilum | Low | Start | 1 | October 2024 | Incomplete citations (October 2024) |
| Theromaster brunneus | Low | Stub | 1 | CS1 errors: ISBN date | |
| Thomas Bell (zoologist) | Low | C | 1 | CS1 errors: generic name | |
| Thomas Henry Huxley | Low | B | 6 | January 2016 | Unsourced passages need footnotes {{citation needed}} (January 2016, May 2017, June 2022, April 2023), Style editing needed (June 2022), Unsourced passages need footnotes {{More citations needed}} (June 2022) |
| Threatened arthropods | Mid | Start | 1 | April 2021 | Unsourced passages need footnotes {{citation needed}} (April 2021) |
| Thymopsis nilenta | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Tick | Top | GA | 6 | July 2023 | Pages with broken anchors (see article talk page, remove when fixed), Dead external links {{dead link}} (July 2023, March 2024, August 2024), Unsourced passages need footnotes {{citation needed}} (June 2025), Cites unreliable sources (June 2025) |
| Ticks of domestic animals | Mid | B | 3 | October 2020 | Unsourced passages need footnotes {{citation needed}} (October 2020, November 2020), Page number citations needed (November 2020) |
| Timeline of eurypterid research | Low | List | 4 | July 2021 | CS1 errors: missing periodical, Incomplete lists (July 2021), CS1 errors: periodical ignored, CS1 errors: ISBN date |
| Tirrenosiro | Low | Start | 1 | February 2024 | Categories needed (February 2024) |
| Tityus achilles | Low | Start | 1 | October 2025 | Orphaned (October 2025) |
| Tityus bahiensis | High | Start | 2 | September 2020 | Unsourced passages need footnotes {{citation needed}} (September 2020, March 2021) |
| Tityus serrulatus | Low | Start | 1 | CS1 errors: missing periodical | |
| Tityus tenuicauda | Low | Stub | 1 | May 2024 | Unsourced passages need footnotes {{citation needed}} (May 2024) |
| Tomolonus | Low | Stub | 1 | March 2025 | Orphaned (March 2025) |
| Tonglaiia | Low | Stub | 1 | September 2025 | Cites unreliable sources (September 2025) |
| Tonkinbolus | Low | Stub | 1 | January 2020 | Unsourced passages need footnotes {{More citations needed}} (January 2020) |
| Torrenticola (mite) | Low | Stub | 1 | December 2022 | Incomplete lists (December 2022) |
| Trachyleberididae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Trachysalambria curvirostris | Mid | C | 1 | May 2019 | Dead external links {{dead link}} (May 2019) |
| Trapezia rufopunctata | Low | Start | 1 | September 2023 | Has general references but lacks inline footnotes (September 2023) |
| Trhypochthoniidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Triarthrus | Low | C | 1 | CS1 errors: ISBN date | |
| Trichorhina acuta | Low | Stub | 1 | June 2024 | Categories needed (June 2024) |
| Trichorhina amazonica | Low | Stub | 1 | June 2024 | Categories needed (June 2024) |
| Trichorhina tomentosa | Low | Stub | 1 | May 2023 | Cites unreliable sources (May 2023) |
| Trichotoma | Low | Stub | 1 | March 2023 | Potentially dated statements (March 2023) |
| Tricrepicephalus | Low | Start | 1 | CS1 errors: ISBN date | |
| Tridenchthonius | Low | Stub | 1 | CS1 errors: ISBN date | |
| Triditarsus | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Trigonholaspis trigonarum | Low | Stub | 1 | February 2023 | Unsourced passages need footnotes {{More citations needed}} (February 2023) |
| Trilobite | Top | B | 3 | May 2017 | Dead external links {{dead link}} (May 2017, October 2025), CS1 errors: ISBN date |
| Trilobite zone | Low | Stub | 2 | November 2012 | Obsolete information (November 2012), Dead external links {{dead link}} (January 2026) |
| Trilobites (genus) | Low | List | 1 | CS1 errors: ISBN date | |
| Trilobus | Low | List | 1 | CS1 errors: ISBN date | |
| Trimerocephalus | Low | Start | 1 | CS1 errors: ISBN date | |
| Triops | Mid | C | 1 | June 2024 | Introduction cleanup (June 2024) |
| Triops newberryi | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Triplogyniidae | Low | Stub | 1 | October 2025 | Unsourced passages need footnotes {{More citations needed}} (October 2025) |
| Trithyreus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Troglostenochrus | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Trogolaphysa carpenteri | Low | Stub | 1 | June 2024 | Orphaned (June 2024) |
| Trombicula | Low | C | 3 | December 2020 | Unsourced passages need footnotes {{More citations needed}} (December 2020), Unsourced passages need footnotes {{citation needed}} (December 2020, November 2021) |
| Trombiculidae | Mid | B | 3 | May 2024 | Unsourced passages need footnotes {{citation needed}} (May 2024), Dead external links {{dead link}} (September 2024), Weasel-worded phrases (November 2025) |
| Trombiculosis | Low | Start | 2 | October 2020 | Unsourced passages need footnotes {{citation needed}} (October 2020, January 2021) |
| Trombidiformes | Low | Stub | 1 | CS1 errors: periodical ignored | |
| Tropocyclops | Low | Stub | 1 | CS1 errors: archive-url | |
| Tubuca rosea | Low | Stub | 1 | May 2022 | Categories needed (May 2022) |
| Tubuca urvillei | Low | Stub | 1 | November 2023 | Unsourced passages need footnotes {{citation needed}} (November 2023) |
| Turbinoptidae | Low | Stub | 1 | May 2024 | Unsourced passages need footnotes {{More citations needed}} (May 2024) |
| Turkmenicampa | Low | Stub | 2 | February 2021 | Orphaned (February 2021), Unsourced passages need footnotes {{More citations needed}} (January 2025) |
| Tydeus (mite) | Low | Stub | 1 | December 2022 | Unsourced passages need footnotes {{citation needed}} (December 2022) |
| Tylopterella | Low | GA | 1 | CS1 errors: ISBN date | |
| Tympanospinctus | Low | Stub | 1 | October 2022 | Orphaned (October 2022) |
| Typhloditha | Low | Stub | 1 | CS1 errors: ISBN date | |
| Typopeltis | Low | Start | 1 | October 2022 | Potentially dated statements (October 2022) |
| Tyrannochthonius | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Tyrophagus casei | Low | Stub | 1 | January 2023 | Clarification needed (January 2023) |
| Unguiblossia | Low | Stub | 1 | April 2023 | Potentially dated statements (April 2023) |
| Unionopterus | Low | GA | 1 | CS1 errors: ISBN date | |
| Upogebia deltaura | Low | Start | 1 | January 2026 | Dead external links {{dead link}} (January 2026) |
| Uristidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Urocaridella pulchella | Low | Start | 1 | November 2019 | Unsourced passages need footnotes {{citation needed}} (November 2019) |
| Urodacus manicatus | Low | Start | 1 | CS1 errors: periodical ignored | |
| Uropod | Mid | Start | 1 | CS1 errors: periodical ignored | |
| Uropoda | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{citation needed}} (December 2025) |
| Vaejovis carolinianus | Low | Stub | 1 | CS1 errors: ISBN date | |
| Vandeleumatidae | Low | Stub | 1 | June 2021 | Expansion needed (June 2021) |
| Vargula hilgendorfii | Low | C | 1 | July 2018 | Dead external links {{dead link}} (July 2018) |
| Varroa | Low | Start | 2 | January 2019 | Unsourced passages need footnotes {{citation needed}} (January 2019, March 2025) |
| Varroa destructor | Mid | GA | 1 | August 2025 | Unsourced passages need footnotes {{citation needed}} (August 2025) |
| Varroa jacobsoni | Low | C | 2 | January 2025 | Cites unreliable sources (January 2025), Unsourced passages need footnotes {{citation needed}} (January 2025) |
| Varroinae | Low | Stub | 1 | December 2025 | Potentially dated statements (December 2025) |
| Vasates | Low | Stub | 1 | August 2025 | Unsourced passages need footnotes {{More citations needed}} (August 2025) |
| Veigaia hohuanshanensis | Low | Stub | 1 | May 2022 | Unsourced passages need footnotes {{More citations needed}} (May 2022) |
| Veigaiidae | Low | Stub | 1 | August 2014 | Has general references but lacks inline footnotes (August 2014) |
| Venitus latreillei | Low | Stub | 1 | October 2025 | Orphaned (October 2025) |
| Verrucaditha | Low | Stub | 1 | CS1 errors: ISBN date | |
| Verrucadithella | Low | Stub | 1 | CS1 errors: ISBN date | |
| Viaphacops | Low | Start | 1 | CS1 errors: ISBN date | |
| Vinabayesius | Low | Stub | 1 | September 2022 | Potentially dated statements (September 2022) |
| Waldo L. Schmitt | Low | Start | 4 | May 2013 | Prose needed (May 2013), Cleanup needed (May 2013), Unsourced passages need footnotes {{citation needed}} (November 2025), Dead external links {{dead link}} (November 2025) |
| Warneticaris | Low | Stub | 1 | May 2025 | Orphaned (May 2025) |
| Waukesha butterfly animal | NA | Redirect | 1 | Pages with broken anchors (see article talk page, remove when fixed) | |
| Weeksina | Low | Stub | 1 | CS1 errors: missing periodical | |
| Wernerius inyoensis | Low | Start | 1 | October 2022 | Orphaned (October 2022) |
| Westergaardites | Low | Stub | 2 | May 2023 | Too technical (May 2023), CS1 errors: ISBN date |
| Weygoldtia | Low | Stub | 1 | October 2022 | Potentially dated statements (October 2022) |
| Whale louse | Low | C | 1 | December 2023 | Unsourced passages need footnotes {{More citations needed}} (December 2023) |
| White spot syndrome | Low | C | 2 | February 2017 | Unsourced passages need footnotes {{More citations needed}} (February 2017), Unsourced passages need footnotes {{citation needed}} (March 2021) |
| Whiteleg shrimp | Mid | C | 3 | March 2025 | Unsourced passages need footnotes {{citation needed}} (March 2025), Unsourced passages need footnotes {{More citations needed}} (March 2025), Vague or ambiguous time (August 2025) |
| William Aitcheson Haswell | Low | C | 1 | July 2022 | Unsourced passages need footnotes {{citation needed}} (July 2022) |
| William Elford Leach | Mid | C | 1 | January 2026 | Introduction cleanup (January 2026) |
| Withiidae | Low | Stub | 1 | October 2023 | Potentially dated statements (October 2023) |
| Woodlouse | Top | B | 2 | September 2025 | Unsourced passages need footnotes {{citation needed}} (September 2025), Dead external links {{dead link}} (January 2026) |
| Worthenella | Low | Stub | 1 | CS1 errors: external links | |
| Xanthidae | Low | Stub | 1 | October 2023 | Cites unreliable sources (October 2023) |
| Xenobalanus globicipitis | Low | Stub | 1 | May 2024 | Categories needed (May 2024) |
| Xenotrecha | Low | Stub | 1 | April 2025 | Style editing needed (April 2025) |
| Xenylla grisea | Low | Stub | 1 | July 2025 | Dead external links {{dead link}} (July 2025) |
| Xerces Society | Low | Stub | 1 | Pages with broken anchors (see article talk page, remove when fixed) | |
| Xiazhuangocaris | Low | Stub | 1 | December 2025 | Unsourced passages need footnotes {{More citations needed}} (December 2025) |
| Xiphosura | Top | C | 2 | December 2017 | Dead external links {{dead link}} (December 2017), Potentially dated statements (2018) |
| Youti | Low | Stub | 1 | September 2025 | Unsourced passages need footnotes {{More citations needed}} (September 2025) |
| Yunkeracarus faini | Low | Stub | 1 | September 2018 | Has general references but lacks inline footnotes (September 2018) |
| Zabius fuscus | Low | Stub | 1 | April 2018 | Cites unreliable sources (April 2018) |
| Zephroniidae | Low | Stub | 1 | CS1 errors: missing periodical | |
| Zeria | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Zeriassa | Low | Stub | 1 | August 2023 | Potentially dated statements (August 2023) |
| Zicman Feider | Low | Start | 3 | December 2017 | Conflict of interest (December 2017), Cleanup needed (December 2021, December 2021) |
| Zosimus aeneus | Low | C | 1 | July 2025 | Dead external links {{dead link}} (July 2025) |
| Zuma acuta | Low | Stub | 1 | October 2025 | Dead external links {{dead link}} (October 2025) |
| Zuma tioga | Low | Stub | 1 | October 2025 | Dead external links {{dead link}} (October 2025) |