Poposauridae

Poposauridae is a family of large carnivorous archosaurs which lived alongside dinosaurs during the Late Triassic. They were around 2.5 to 5 metres (8 ft 2 in to 16 ft 5 in) long. Poposaurids are known from fossil remains from North and South America. While originally believed to be theropod dinosaurs (they mirrored the theropods in a number of respects, such as features of the skull and bipedal locomotion), cladistic analysis has shown them to be more closely related to crocodiles.

Poposauridae Temporal range: Late Triassic
Poposaurus gracilis
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Archosauria
Clade:	Pseudosuchia
Clade:	†Poposauroidea
Family:	†Poposauridae Nopcsa, 1923
Genera
†Dolichobrachium †Poposaurus

An early cladistic analysis of crocodylotarsan archosaurs included Poposaurus, Postosuchus, Teratosaurus, and Bromsgroveia within Poposauridae.^[1] However, later studies found Teratosaurus to be a rauisuchid.^[2][3] All recent phylogenetic analyses place Postosuchus either as a rauisuchid ^[4] or a prestosuchid.^[5][6][7]

Genera

Genus	Status	Age	Location	Description	Images
†Dolichobrachium	Nomen dubium.	Late Triassic	North America
†Lythrosuchus	Junior synonym.			Junior synonym of Poposaurus
†Poposaurus	Valid.	Late Triassic	North America.