Where: Rio Blanco County, Colorado (40.0° N, 108.2° W: paleocoordinates 47.3° N, 79.6° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Williams Fork Formation, Late/Upper Campanian to Late/Upper Campanian (83.5 - 66.0 Ma)

• Listed as 'Edmontonian' by Cohen et al. (2020)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: mesofossils

Primary reference: J. E. Cohen, B. M. Davis, and R. L. Cifelli. 2020. Geologically oldest Pediomyoidea (Mammalia, Marsupialiformes) from the Late Cretaceous of North America, with implications for taxonomy and diet of earliest Late Cretaceous mammals. Journal of Vertebrate Paleontology e1835935:1-13 [P. Mannion/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 215635: authorized by Philip Mannion, entered by Philip Mannion on 18.11.2020

Creative Commons license: CC BY (attribution)