Twentyfive Mile District ( of the United States)

Where: Goshen County, Wyoming (42.0° N, 104.2° W: paleocoordinates 42.9° N, 99.2° W)

• coordinate based on political unit

When: Marsland Formation (Hemingford Group), Harrisonian (24.8 - 20.4 Ma)

• = Upper Harrison beds

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: X. Wang, R. H. Tedford, and B. E. Taylor. 1999. Phylogenetic systematics of the Borophaginae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 243:1-392 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 17850: authorized by John Alroy, entered by John Alroy on 26.03.1995

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Carnivora - Amphicyonidae
Ysengrinia americana1 Wortman 1901 bear-dog
 Carnivora - Canidae
Desmocyon thomsoni Matthew 1907 bone-crushing dog
 Artiodactyla - Merycoidodontidae
Merycochoerus matthewi2 Loomis 1924 oreodont
Merychyus arenarum3 Cope 1884 oreodont
Merychyus minimus3 Peterson 1907 oreodont