Opal (UM BB-9) (Eocene of the United States)

Where: Lincoln County, Wyoming (41.8° N, 110.7° W: paleocoordinates 45.9° N, 96.9° 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 16308: authorized by John Alroy, entered by John Alroy on 21.09.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

 Perissodactyla - Hyrachyidae
Hyrachyus sp. Leidy 1871 odd-toed ungulate
 Ungulata - Homacodontidae
Microsus cuspidatus Leidy 1870 even-toed ungulate
 Hyaenodonta - Hyaenodontidae
Sinopa rapax Leidy 1871 eutherian
 Oxyaenodonta - Oxyaenidae