U.S. Highway 40 Roadcut (Miocene of the United States)

Also known as USGS D645 (65-G-6)

Where: grand County, Colorado (40.1° N, 106.2° W: paleocoordinates 41.4° N, 102.4° W)

• small collection-level geographic resolution

When: troublesome Formation, Early/Lower Hemingfordian (20.4 - 16.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

• none given

Size class: macrofossils

Reposited in the USGS

Primary reference: R. M. Hunt, Jr. 2003. Intercontinental migration of large mammalian carnivores: earliest occurrence of the Old World beardog Amphicyon (Carnivora, Amphicyonidae) in North America. Bulletin of the American Museum of Natural History 279:77-115 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 35608: authorized by John Alroy, entered by John Alroy on 30.12.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

• only one taxon is reported
Mammalia
 Carnivora - Amphicyonidae
Amphicyon galushai Hunt 2003 bear-dog