Little Muddy IV (UM BB-104) (Eocene of the United States)

Where: Uinta County, Wyoming (41.2° N, 110.5° W: paleocoordinates 45.2° N, 96.8° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Bridger Formation, Bridgerian (50.3 - 46.2 Ma)

Environment/lithology: terrestrial

Primary reference: G. F. Gunnell. 1998. Mammalian Fauna From the Lower Bridger Formation (Bridger A, Early Middle Eocene) of the Southern Green River Basin, Wyoming. Contributions from the Museum of Paleontology, University of Michigan 30(3):83-130 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 16257: authorized by John Alroy, entered by John Alroy on 15.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• indicated by Gunnell to be in Lincoln County near Opal, but actually in Uinta County on Little Muddy Creek; see map of Zonneveld et al. 2000
mentioned by Clyde et al. 1997 but no mammals were listed
Mammalia
 Primates - Microsyopidae
Microsyops cf. elegans Marsh 1871 primate
 Perissodactyla - Hyrachyidae
Hyrachyus sp. Leidy 1871 odd-toed ungulate