Circle Cliffs Poposaurus (Triassic of the United States)

Where: Garfield County, Utah (38.0° N, 111.1° W: paleocoordinates 13.8° N, 48.8° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Monitor Butte Member (Chinle Formation), Norian (228.0 - 208.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; siliciclastic sediments

Size class: macrofossils

Collected in 2003; reposited in the YPM

Collection methods: quarrying, mechanical,

Primary reference: J. A. Gauthier, S. J. Nesbitt, E. R. Schachner, G. S. Bever, and W. G. Joyce. 2011. The bipedal stem crocodilian Poposaurus gracilis: inferring function in fossils and innovation in archosaur locomotion. Bulletin of the Peabody Museum of Natural History 52(1):107-126 [R. Butler/R. Butler]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 108771: authorized by Richard Butler, entered by Richard Butler on 04.05.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Pseudosuchia -
Poposaurus gracilis Mehl 1915 archosaur
YPM VP 057100, nearly complete skeleton lacking skull