DiplocynodonDiplocynodon est un genre éteint d'Alligatoroidea qui a vécu pendant le Paléocène et jusqu'au Miocène moyen en Europe. L'espèce type, Diplocynodon ratelii a été créée par le paléontologue français Auguste Pomel en 1847. Au , Diplocynodon steineri a été nommé du nom de la ville de Styrie en Autriche et Diplocynodon styriacus a été nommé en Autriche et en France. Une troisième espèce autrichienne, Enneodon ungeri, a été placée dans son propre genre.
AlligatoroideaLes Alligatoroidea sont une super-famille de reptiles apparue à la fin du Crétacé et contenant la famille des Alligatoridae. Cladistiquement, ils sont définis comme comprenant Alligator mississippiensis (Alligator américain) et tous les crocodiliens qui lui sont plus apparentés qu'à Crocodylus niloticus (Crocodile du Nil). Leurs groupe frère est celui des Crocodyloidea. le clade Globidonta comprend: la famille Alligatoridae: †Brachychampsa, Gilmore 1911 †Stangerochampsa, Wu et al.
StangerochampsaStangerochampsa is an extinct genus of globidontan alligatoroid, possibly an alligatorine or a stem-caiman, from the Late Cretaceous of Alberta. It is based on RTMP.86.61.1, a skull, partial lower jaws, and partial postcranial skeleton discovered in the late Campanian–early Maastrichtian-age Horseshoe Canyon Formation. Stangerochampsa was described in 1996 by Wu and colleagues. The type species is S. mccabei. The generic name honors the Stanger family, the owners of the ranch where the specimen was found, and the species name honors James Ross McCabe, who discovered, collected, and prepared it.
GlobidontaGlobidonta is a clade of alligatoroids that includes alligators, caimans, and closely related extinct forms. It is defined as a stem-based clade including Alligator mississippiensis (the American Alligator) and all forms more closely related to it than to Diplocynodon. The group's fossil range extends back into the Late Cretaceous with early alligatoroids such as Albertochampsa and Brachychampsa. Extinct globidontans were particularly common in North America and Eurasia, and their modern range also includes South America.
CeratosuchusCeratosuchus ("horned crocodile") is an extinct genus of alligatorine crocodylian from latest Paleocene rocks of Colorado's Piceance Basin and earliest Eocene rocks of Wyoming's Bighorn Basin in North America, a slice of time known as the Clarkforkian North American Land Mammal Age. Like its modern relatives, Ceratosuchus was a swamp-dwelling predator. It is named for the pair of flattened, triangular bony plates that extend from the back of its head. The type species is C.
