Where: Big Horn County, Wyoming (44.3° N, 108.3° W: paleocoordinates 49.1° N, 91.1° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Willwood Formation, Wasatchian (55.8 - 50.3 Ma)

• "Upper Graybull beds"

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by M. V. Walker in 1931; reposited in the USNM

Primary reference: M. A. O'Leary and K. D. Rose. 1995. Postcranial Skeleton of the Early Eocene Mesonychid Pachyaena (Mammalia: Mesonychia). Journal of Vertebrate Paleontology 15(2):401-430 [J. Alroy/J. Alroy/J. Ju]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 109254: authorized by John Alroy, entered by John Alroy on 14.05.2011

Creative Commons license: CC BY (attribution)