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Calcarichelys

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Extinct genus of turtle

Calcarichelys Temporal range:Campanian–Maastrichtian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Testudines
Suborder:	Cryptodira
Family:	†Protostegidae
Genus:	†Calcarichelys Zangerl, 1953
Type species
Calcarichelys gemma Zangerl, 1953

Calcarichelys ('spur turtle' or 'thorn turtle')^[1] is an extinctgenus ofprotostegid turtle from theLate Cretaceous of the Selma Formation inAlabama, and possibly fromAngola.^[2]^[1]^[3]^[4] It contains only one species,C. gemma.^[3]^[5]

Discovery

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The holotype specimen ofCalcarichelys is known fromMooreville Chalk,Alabama.^[1] More complete specimens are later described from same formation.^[3] Another specimen that possibly belongs toCalcarichelys or related species is known from theMaastrichtian of Bentiaba,Angola.^[4]

Description

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Calcarichelys is a small protostegid, with acarapace length of 25.3 cm (10.0 in).^[3] It is probably closely related toChelosphargis, as they share some characteristics.^[1]^[3] UnlikeChelosphargis,Calcarichelys is characterized by thornlike neural plates.^[1]^[3]

References

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^^a ^b ^c ^d ^eZangerl, Rainer; Museum, Chicago Natural History (1953).The vertebrate fauna of the Selma Formation of Alabama. [Chicago, Ill.]: Chicago Natural History Museum.
^"Mindat.org".www.mindat.org. Retrieved2022-04-22.
^^a ^b ^c ^d ^e ^fHooks, G. E. (1998-04-10)."Systematic revision of the Protostegidae, with a redescription of Calcarichelys gemma Zangerl, 1953".Journal of Vertebrate Paleontology.18 (1):85–98.doi:10.1080/02724634.1998.10011036.ISSN 0272-4634.
^^a ^bMateus, Octávio; Polcyn, Michael; Jacobs, Louis; Araujo, Ricardo; Schulp, A.; Marinheiro, João; Pereira, Bruno; Vineyard, Diana (2012-01-01)."Cretaceous amniotes from Angola: dinosaurs, pterosaurs, mosasaurs, plesiosaurs, and turtles".V Jornadas Internacionales sobre Paleontolog'ia de Dinosaurios y su Entorno.
^"Calcarichelys - Encyclopedia of Life".eol.org. Retrieved2022-04-22.

Testudines

Kingdom:Animalia
Phylum:Chordata
Class:Reptilia
Clade:Diapsida
Order:Testudines

Genus

Chelonioidea
(Sea turtles)

Cheloniidae	†Allopleuron Caretta †Carolinochelys Chelonia †Eochelone Eretmochelys †Gigantatypus †Glarichelys †Itilochelys Lepidochelys †Mexichelys †Miocaretta Natator †Pacifichelys †Syllomus †Tasbacka
Dermochelyidae	†Arabemys †Corsochelys †Cosmochelys Dermochelys †Eosphargis †Mesodermochelys †Psephophorus
	†Euclastes †Peritresius †Procolpochelys †Protosphargis †Puppigerus

Kinosternoidea

Dermatemydidae	Dermatemys
Kinosternidae	Claudius †Hoplochelys Kinosternon Staurotypus Sternotherus

Testudinoidea

Emydidae	†Acherontemys Chrysemys Clemmys Deirochelys Emys Actinemys Emydoidea Glyptemys Graptemys Malaclemys Pseudemys Terrapene Trachemys †Wilburemys
Geoemydidae	Batagur †Banhxeochelys Cuora Cyclemys Geoclemys Geoemyda Hardella Heosemys Leucocephalon Malayemys Mauremys Melanochelys Morenia Notochelys Orlitia Pangshura Rhinoclemmys Sacalia Siebenrockiella Vijayachelys
Platysternidae	Platysternon
Testudinidae	Aldabrachelys Astrochelys Centrochelys Chelonoidis Chersina Cylindraspis †Cymatholcus †Floridemys Geochelone Gopherus †Hadrianus †Hesperotestudo Homopus Indotestudo Kinixys Malacochersus Manouria †Megalochelys †Oligopherus Psammobates Pyxis †Solitudo Stigmochelys †Stylemys Testudo

Trionychia

Carettochelyidae	†Allaeochelys †Anosteira Carettochelys
Trionychidae	Amyda Apalone †Axestemys Chitra Cyclanorbis Cycloderma †Drazinderetes Dogania †Gilmoremys †Hutchemys †Khunnuchelys Lissemys Nilssonia Palea †Palaeoamyda Pelochelys Pelodiscus Rafetus Trionyx
	†Basilochelys †Sinaspideretes

Chelydridae	Chelydra †Chelydrops †Chelydropsis †Emarginachelys †Macrocephalochelys Macrochelys †Planiplastron †Protochelydra
†Nanhsiungchelyidae	†Anomalochelys †Basilemys †Jiangxichelys
†Protostegidae	†Alienochelys †Archelon †Atlantochelys †Bouliachelys †Calcarichelys †Cratochelone †Desmatochelys †Iserosaurus †Notochelone †Ocepechelon †Pneumatoarthrus †Protostega †Rhinochelys †Santanachelys †Terlinguachelys
	†Adocus †Argillochelys †Bashuchelys †Ctenochelys †Prionochelys †Toxochelys

Pleurodira

†Araripemydidae	†Araripemys
†Bothremydidae	†Araiochelys †Arenila †Azabbaremys †Bothremys †Cearachelys †Chedighaii †Chupacabrachelys †Eotaphrosphys †Foxemys †Galianemys †Ilatardia †Inaechelys †Itapecuruemys †Jainemys †Kinkonychelys †Kurmademys †Labrostochelys †Nigeremys †Phosphatochelys †Polysternon †Puentemys †Rosasia †Rhothonemys †Sankuchemys †Taphrosphys †Ummulisani †Zolhafah
Chelidae	Acanthochelys Chelodina Chelus Elseya Elusor Emydura Hydromedusa †Lomalatachelys Mesoclemmys Myuchelys Phrynops Platemys †Prochelidella Pseudemydura Rheodytes Rhinemys †Yaminuechelys
Pelomedusidae	Pelomedusa Pelusios
Podocnemididae	†Albertwoodemys †Bauruemys †Brontochelys †Caninemys †Carbonemys †Cerrejonemys †Cordichelys Erymnochelys †Lapparentemys †Latentemys Peltocephalus Podocnemis †Stupendemys
†Sahonachelyidae	†Sahonachelys †Sokatra

	†Caribemys †Caririemys †Tacuarembemys

Phylogenetic arrangement of turtles based onTurtles of the World 2017 Update: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status. † = extinct.

See alsoList of Testudines families

Taxon identifiers
Calcarichelys	Wikidata:Q20672629 Wikispecies:Calcarichelys EoL:4522548 GBIF:4818908 IRMNG:1211688 Open Tree of Life:4948105 Paleobiology Database:36331

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