Neosuchia

Neosuchia Temporal range: Early Jurassic - Recent,
Crocodylus niloticus, a modern crocodylid
Sarcosuchus imperator, a pholidosaurid from North Africa in the Early Cretaceous
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Archosauria
Clade:	Pseudosuchia
Clade:	Crocodylomorpha
Clade:	Metasuchia
Clade:	Neosuchia Benton & Clark, 1988
Subgroups
†Burkesuchus †Gilchristosuchus †Isisfordia †Karatausuchus †Khoratosuchus †Montsecosuchus †Paluxysuchus †Stolokrosuchus? †Susisuchus †Tadzhikosuchus †Wahasuchus? †Atoposauridae †Bernissartiidae †Goniopholididae †Paralligatoridae †Stomatosuchidae †Tethysuchia †Thalattosuchia? †Wannchampsidae Eusuchia (includes crocodylians)

Neosuchia is a clade within Mesoeucrocodylia that includes all modern extant crocodilians and their closest fossil relatives. It is defined as the most inclusive clade containing all crocodylomorphs more closely related to Crocodylus niloticus (the Nile Crocodile) than to Notosuchus terrestris. Members of Neosuchia generally share a crocodilian-like bodyform adapted to freshwater aquatic life, as opposed to the terrestrial habits of more basal crocodylomorph groups. The earliest neosuchian is suggested to be the Early Jurassic Calsoyasuchus, which lived during the Sinemurian and Pliensbachian stages in North America. It is often identified as a member of Goniopholididae, though this is disputed, and the taxon may lie outside Neosuchia, which places the earliest records of the group in the Middle Jurassic.

Characteristics

Life restoration of Siamosuchus, a member of Goniopholididae

Members of Neosuchia have a wide diversity of skull shapes. Several groups convergently evolved elongate gharial-like skulls, which makes determining phylogenetic relationships of these taxa problematic.

Phylogeny

Cladogram from Groh et al. 2022:

Neosuchia	†Alligatorellus †Alligatorium †Atoposauridae †Tethysuchia †Goniopholididae †Koumpiodontosuchus †Paralligatoridae †Susisuchus †Isisfordia Eusuchia

External links

• Neosuchia in the Paleobiology Database