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Gavialis

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(Redirected fromGavialis lewisi)
Genus of reptiles

Gavialis
Temporal range: EarlyMiocene - recent,20–0 Ma
Thegharial (Gavialis gangeticus), the only living species ofGavialis
Scientific classificationEdit this classification
Kingdom:Animalia
Phylum:Chordata
Class:Reptilia
Clade:Archosauria
Order:Crocodilia
Superfamily:Gavialoidea
Family:Gavialidae
Subfamily:Gavialinae
Genus:Gavialis
Oppel, 1811
Species
A skull of the extinctGavialis speciesG. bengawanicus, which lived in the Pleistocene

Gavialis is agenus ofcrocodylians that includes the livinggharialGavialis gangeticus and one known extinct species,Gavialis bengawanicus.[1]G. gangeticus comes from theIndian subcontinent,[2] whileG. bengawanicus is known fromJava.Gavialis likely first appeared in the Indian Subcontinent in the Pliocene and dispersed into theMalay Archipelago through a path called the Siva–Malayan route in theQuaternary. Remains attributed toGavialis have also been found onSulawesi andWoodlark Island east of theWallace Line, suggesting a prehistoric lineage ofGavialis was able to traverse marine environments and reach places possibly as far as westernOceania.[3]

The genusGavialis was reevaluated in 2018 based on specimens in theNatural History Museum, London that were collected in theSivalik Hills. The author concluded thatG. gangeticus andG. bengawanicus are the only two species in the genusGavialis, withG. hysudricus as a junior synonym ofG. gangeticus.Rhamphosuchus is proposed to includeG. leptodus,G. pachyrhynchus,G. curvirostris andG. breviceps. The speciesG. browni andG. lewisi require further revisions.[1]G. dixoni has been assigned its own genus,Dollosuchus.[4] In 2025,G. pachyrhynchus and its junior synonymG. breviceps were included within the genusRhamphosuchus as a new combinationR. pachyrhynchus, whileG. curvirostris was assigned to its own genus,Pseudogavialis.[5]

The belowcladogram of the majorextant crocodile groups is based on the latest molecular studies, and shows the gharial's close relationship to thefalse gharial, and how thegavialids andcrocodiles are more closely related than thealligatoroids:[6][7][8][9][10]

Crocodilia

Here is a more detailed cladogram that showsGavialis's proposed placement withinGavialidae, includingextinct members:[9]

Gavialidae

References

[edit]
  1. ^abMartin, J. E. (2018)."The taxonomic content of the genusGavialis from the Siwalik Hills of India and Pakistan"(PDF).Papers in Palaeontology.5 (3):483–497.doi:10.1002/spp2.1247.S2CID 134966832.
  2. ^Lull, R. S. (1944). "Fossil gavials from north India".American Journal of Science.242 (8):417–430.Bibcode:1944AmJS..242..417L.doi:10.2475/ajs.242.8.417.
  3. ^Delfino, M.; De Vos, J. (2010). "A revision of the Dubois crocodylians,Gavialis bengawanicus andCrocodylus ossifragus, from the Pleistocene Homo erectus beds of Java".Journal of Vertebrate Paleontology.30 (2): 427.Bibcode:2010JVPal..30..427D.doi:10.1080/02724631003617910.S2CID 86396515.
  4. ^Swinton, W. E. (1937). "The crocodile of Maransart (Dollosuchus dixoni [Owen])".Mémoires du Musée d'Histoire Naturelle de Belgique.80: 1–44.
  5. ^Courville, E.; Métais, G.; Antoine, P.-O.; Marivaux, L.; Jouve, S. (2025)."Giant longirostrine crocodylians from the Lower Miocene of Pakistan: new material and taxonomic review".Papers in Palaeontology.11 (3). e70010.doi:10.1002/spp2.70010.
  6. ^Harshman, J.; Huddleston, C. J.; Bollback, J. P.; Parsons, T. J.; Braun, M. J. (2003)."True and false gharials: A nuclear gene phylogeny of crocodylia"(PDF).Systematic Biology.52 (3):386–402.doi:10.1080/10635150309323.PMID 12775527. Archived fromthe original(PDF) on 2022-10-09. Retrieved2021-06-28.
  7. ^Gatesy, J.; Amato, G. (2008). "The rapid accumulation of consistent molecular support for intergeneric crocodylian relationships".Molecular Phylogenetics and Evolution.48 (3):1232–1237.doi:10.1016/j.ympev.2008.02.009.PMID 18372192.
  8. ^Erickson, G. M.; Gignac, P. M.; Steppan, S. J.; Lappin, A. K.; Vliet, K. A.; Brueggen, J. A.; Inouye, B. D.; Kledzik, D. & Webb, G. J. W. (2012)."Insights into the ecology and evolutionary success of crocodilians revealed through bite-force and tooth-pressure experimentation".PLOS ONE.7 (3) e31781.Bibcode:2012PLoSO...731781E.doi:10.1371/journal.pone.0031781.PMC 3303775.PMID 22431965.
  9. ^abMichael S. Y. Lee; Adam M. Yates (27 June 2018)."Tip-dating and homoplasy: reconciling the shallow molecular divergences of modern gharials with their long fossil".Proceedings of the Royal Society B.285 (1881).doi:10.1098/rspb.2018.1071.PMC 6030529.PMID 30051855.
  10. ^Hekkala, E.; Gatesy, J.; Narechania, A.; Meredith, R.; Russello, M.; Aardema, M. L.; Jensen, E.; Montanari, S.; Brochu, C.; Norell, M.; Amato, G. (2021-04-27)."Paleogenomics illuminates the evolutionary history of the extinct Holocene "horned" crocodile of Madagascar, Voay robustus".Communications Biology.4 (1): 505.doi:10.1038/s42003-021-02017-0.ISSN 2399-3642.PMC 8079395.PMID 33907305.
ExtantCrocodilian species
FamilyAlligatoridae(Alligators and caimans)
Alligatorinae
(Alligators)
Alligator
Caimaninae
(Caimans)
Caiman
Melanosuchus
Paleosuchus
FamilyCrocodylidae(True crocodiles)
Crocodylinae
Crocodylus
Osteolaeminae
Mecistops
Osteolaemus
Gavialis
Tomistoma
Pseudosuchia
Neosuchia
Crocodilia
    • see below↓
Basal crocodilians
Mekosuchinae
Others
Orientalosuchina
Alligatorinae
Alligator
Caimaninae
Melanosuchus
Caiman
Deinosuchus riograndensisPurussaurus brasiliensis
Osteolaeminae
Crocodylinae
Crocodylus
Tomistominae
sensu stricto
Tomistoma
Gavialinae
sensu lato
Gavialis
Crocodylus anthropophagusHanyusuchus sinensis
Gavialis
Gavialis gangeticus
Gavialis bengawanicus
Gavialis browni
Gavialis pachyrhynchus
National
Other


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