American crocodile Crocodylus acutus, photographed by Tomascastelazo.

Belongs within: Eusuchia.

The family Crocodylidae includes the crocodiles Crocodylus and their closest fossil relatives. The false gharial Tomistoma schlegelii may also be a member of this group, though its phylogenetic position has been open to debate. Members of this family have relatively narrow, elongate heads. The largest living species, the saltwater crocodile Crocodylus porosus, may reach lengths of well over six metres. Other species may be considerably smaller; the Australian freshwater crocodile C. johnstoni, for instance, is usually less than two metres in length.

|--Tadzhikosuchus macrodentis Efimov 1982B93
|--Allognathosuchus polydonSP96
| |--E. arambourgi Ginsburg & Buffetaut 1978LA04
| |--E. brumpti Joleaud 1920LA04
| `--E. nitriae Fourtau 1920LA04
|--Champsa fissipesG42
`--Crocodylus Laurenti 1768C18
| i. s.: C. affinisC77
| C. alligatorB00
| C. chamensis Cope 1874C77
| C. elliottiiC77
| C. gangeticusB00
| C. grypus Cope 1875C77
| C. heterodonC77
| C. liodon Marsh 1871C77
| C. luciusG42
| C. megarhinusSF03
| C. (Botosaurus) selaslophensis Etheridge 1917F71
| C. wheelerii Cope 1875C77
|--+--C. johnstoni Krefft 1873B81, C18
| `--+--C. porosus Schneider 1801B81, C18
| `--+--C. palustrisB81
| | |--C. p. palustrisUSDI77
| | `--C. p. kimbulaUSDI77
| `--+--C. novaeguineaeB81
| | |--C. n. novaeguineaeUSDI77
| | `--C. n. mindorensisUSDI77
| `--C. siamensisB81
`--+--+--C. cataphractusB81
| `--C. niloticus Laurenti 1768B81, MA04 [incl. Lacerta crocodilus Linnaeus 1758B00, L58]
`--+--+--C. acutusB81
| `--C. rhombiferB81
`--+--C. intermediusB81
`--C. moreletiiB81

*Type species of generic name indicated


[B93] Benton, M. J. 1993. Reptilia. In: Benton, M. J. (ed.) The Fossil Record 2 pp. 681–715. Chapman & Hall: London.

[B00] Brongniart, A. 1800. Essai d’une classification naturelle des reptiles. IIe partie. Formation et disposition des genres. Bulletin des Sciences, par la Societé Philomathique de Paris 2 (36): 89–91.

[B81] Brooks, D. R. 1981. Hennig’s parasitological method: a proposed solution. Systematic Zoology 30 (3): 229–249.

[C18] Cogger, H. G. 2018. Reptiles and Amphibians of Australia updated 7th ed. CSIRO Publishing: Collingwood.

[C77] Cope, E. D. 1877. Report upon the extinct Vertebrata obtained in New Mexico by parties of the expedition of 1874. Geographical Surveys West of the One Hundredth Meridian 4 (2): i–iv, 1–370.

[F71] Fletcher, H. O. 1971. Catalogue of type specimens of fossils in the Australian Museum, Sydney. Australian Museum Memoir 13: 1–167.

[G42] Gulliver, G. 1842. On the blood-corpuscles of the British ophidian reptiles, and observations on the blood-corpuscles of other oviparous Vertebrata. Proceedings of the Zoological Society of London 10: 108–111.

[L58] Linnaeus, C. 1758. Systema Naturae per Regna Tria Naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis revised 10th ed. vol. 1. Laurentii Salvii: Holmiae.

[LA04] Llinás Agrasar, E. 2004. Crocodile remains from the Burdigalian (lower Miocene) of Gebel Zelten (Libya). Geodiversitas 26 (2): 309–321.

[MA04] Modesto, S. P., & J. S. Anderson. 2004. The phylogenetic definition of Reptilia. Systematic Biology 53 (5): 815–821.

[PS01] Pickford, M., & B. Senut. 2001. The geological and faunal context of Late Miocene hominid remains from Lukeino, Kenya. Comptes Rendus de L’Academie des Sciences—Series IIA—Earth and Planetary Sciences 332: 145–152.

[SF03] Salisbury, S. W., E. Frey, D. M. Martill & M. C. Buchy. 2003. A new crocodilian from the Lower Cretaceous Crato Formatioin of north-eastern Brazil. Palaeontographica Abteilung A: Paläozoologie—Stratigraphie 270: 3–47.

[SL01] Sereno, P. C., H. C. E. Larsson, C. A. Sidor & B. Gado. 2001. The giant crocodyliform Sarcosuchus from the Cretaceous of Africa. Science 294: 1516–1519.

[SP96] Stucky, R. K., D. R. Prothero, W. G. Lohr & J. R. Snyder. 1996. Magnetic stratigraphy, sedimentology, and mammalian faunas of the Early Uintan Washakie Formation, Sand Wash Bain, northwestern Colorado. In: Prothero, D. R., & R. J. Emry (eds) The Terrestrial Eocene–Oligocene Transition in North America pp. 40–51. Cambridge University Press.

[USDI77] United States Department of the Interior. 1977. Endangered and threatened wildlife and plants—republication of list of species. Federal Register 42: 36420–36431.

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