Popo Agie Formation
Introduction The '''Popo Agie Formation''' is a Triassic geologic formation that crops out in western Wyoming, western Colorado, and Utah. It was deposited during the Late Triassic in fluvial (river) and lacustrine (lake) environments that existed across much of what is now the American southwest. Fragmentary fossils of prehistoric reptiles and amphibians, including pseudosuchian reptiles and temnospondyl amphibians, have been discovered in the Popo Agie Formation. Dinosaur remains are also among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.
Paleobiota ===Amphibians=== Taxon Member Material Notes Images''Apachesaurus'' sp.Complete skullA metoposaurid temnospondyl; specimen from the Popo Agie Formation was originally described as ''Anaschisma'' sp. and later ''Eupelor browni''150px''Koskinonodon perfecta''Complete skullA metoposaurid temnospondyl; specimen from the Popo Agie Formation was originally described as ''Borborophagus wyomingensis''150pxMetoposauridae indet.Complete skullSpecimen was originally described as ''Anaschisma browni''===Reptiles=== Taxon Member Material Notes Images''Heptasuchus clarki''UW 11562, a partial skull and postcranial skeleton; UW 11563 through UW 11565, partial postcranial remains; both from Big Horn Mountains, Wyoming A rauisuchian150px(in background)''Beesiiwo cooowuse''USNM 494329, a left maxilla and left dentary from Hole in the Wall, Wyoming; TxVP 46037.1, UWGM 7027 and UWGM 7028, maxillary fragments from Cottonwood Creek, Wyoming A rhynchosaur, previously assigned to ''cf. Hyperodapedon sanjuanensis''150px(in foreground)''Poposaurus gracilis''UR 358, a partial ilium from Lander, Wyoming; UR 357, a partial skeleton including vertebrae, hips, and limb bones A bipedal poposauroid first described from the Popo Agie Formation and known from more complete specimens from the Chinle Formation150px===Synapsids=== Taxon Member Material Notes Images''Eubrachiosaurus browni''FMNH UC 633, a partial left scapula, left humerus, and left pelvis from Lander, WyomingA dicynodont150px
See also * List of dinosaur-bearing rock formations** List of stratigraphic units with indeterminate dinosaur fossils
Footnotes
References * Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds. ): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. .