The Popo Agie Formation ( / p oʊ ˈ p oʊ ʒ ə / poh- POH -zhə ) 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 .
3-505: Apachesaurus sp. Complete skull A metoposaurid temnospondyl; specimen from the Popo Agie Formation was originally described as Anaschisma sp. and later Eupelor browni [REDACTED] Koskinonodon perfecta Complete skull A metoposaurid temnospondyl; specimen from the Popo Agie Formation was originally described as Borborophagus wyomingensis [REDACTED] Metoposauridae indet. Complete skull Specimen
6-508: 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 Formation [REDACTED] Eubrachiosaurus browni FMNH UC 633, a partial left scapula, left humerus, and left pelvis from Lander, Wyoming A dicynodont [REDACTED] This article about
9-642: Was originally described as Anaschisma browni Heptasuchus UW 11562, a partial skull and postcranial skeleton; UW 11563 through UW 11565, partial postcranial remains; both from Big Horn Mountains, Wyoming A rauisuchian [REDACTED] (in background) Beesiiwo 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 [REDACTED] (in foreground) Poposaurus UR 358,
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