Where: Washington County, Colorado (40.2° N, 103.3° W: paleocoordinates 41.6° N, 94.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: White River Group, Chadronian (37.2 - 33.9 Ma)

• "site consists of White River Group exposures... probably Chadronian"

• member-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collection methods: DMNH collection

Primary reference: R. J. Asher, M. C. McKenna, R. J. Emry, A. R. Tabrum, and D. G. Kron. 2002. Morphology and relationships of Apternodus and other extinct, zalambdodont, placental mammals. Bulletin of the American Museum of Natural History 273:1-117 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 27244: authorized by John Alroy, entered by John Alroy on 24.11.2002

Creative Commons license: CC BY (attribution)