Wind River Popo Agie vertebrates (Triassic of the United States)

Where: Fremont County, Wyoming (43.2° N, 109.0° W: paleocoordinates 12.2° N, 38.7° W)

• coordinate based on nearby landmark

• basin-level geographic resolution

When: Popo Agie Formation (Chugwater Group), Carnian (237.0 - 228.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by Williston in 1904; reposited in the FMNH

• collected by Williston while at University of Chicago

Primary reference: S. W. Williston. 1904. Notice of some new reptiles from the Upper Trias of Wyoming. Journal of Geology 12:688-697 [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 91590: authorized by Richard Butler, entered by Richard Butler on 05.10.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

 Pseudosuchia - Stagonolepididae
Desmatosuchus sp.1 Case 1920 archosaur
Osteoderm; no locality given
 Loricata - Rauisuchidae
Dolichobrachium gracile n. gen. n. sp.
Dolichobrachium gracile n. gen. n. sp. Williston 1904 rauisuchid
Scapulocoracoid, humerus, ribs and partial skull
 Pseudosuchia -
Poposaurus gracilis2 Mehl 1915 archosaur
FMNH UR 358, partial left ilium initially referred to Paleorhinus bransoni