Willow Creek rhynchosaur (Triassic of the United States)

Where: Natrona County, Wyoming (43.5° N, 106.8° W: paleocoordinates 12.0° N, 37.0° W)

• coordinate stated in text

• small collection-level geographic resolution

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

• Lower part of formation

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; conglomerate

Size class: macrofossils

Collected by N. Hotton III; reposited in the USNM

Primary reference: S. G. Lucas, A. B. Heckert, and N. Hotton, III. 2002. The rhynchosaur Hyperodapedon from the Upper Triassic of Wyoming and its global biochronological significance. In A. B. Heckert, S. G. Lucas (eds.), Upper Triassic Stratigraphy and Paleontology, New Mexico Museum of Natural History and Science Bulletin 21:149-156 [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 91493: authorized by Richard Butler, entered by Richard Butler on 30.09.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

 Eosuchia - Rhynchosauridae
Hyperodapedon cf. sanjuanensis Sill 1970 rhynchosaur
USNM 494329, left maxilla, premaxilla and other cranial fragments