Powder River 51-62 (Eocene of the United States)

Where: Johnson County, Wyoming (44.0° N, 106.6° W: paleocoordinates 48.5° N, 89.4° W)

• coordinate based on political unit

When: "Wasatch" Formation, Wasatchian (55.8 - 50.3 Ma)

Environment/lithology: terrestrial

Primary reference: E. Delson. 1971. Fossil mammals of the early Wasatchian Powder River local fauna, Eocene of northeast. Bulletin of the American Museum of Natural History 146(4) [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 16027: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Macroscelidea - Apheliscidae
Apheliscus sp.2, Haplomylus speirianus
Apheliscus sp.2 Cope 1875 elephant shrew
Haplomylus speirianus Cope 1880 elephant shrew
 Condylarthra - Hyopsodontidae
Hyopsodus sp.1
Hyopsodus sp.1 Leidy 1870 condylarth
 Artiodactyla - Diacodexeidae
Diacodexis primus4
Diacodexis primus4 Krishtalka and Stucky 1985 even-toed ungulate
 Rodentia - Ischyromyidae
Paramys sp.
Paramys sp. Leidy 1871 rodent
small; larger rodent also present
 Primates - Notharctidae
Cantius mckennai3
Cantius mckennai3 Gingerich and Simons 1977 primate
 Primates - Microsyopidae
Arctodontomys wilsoni1
Arctodontomys wilsoni1 Szalay 1969 primate
1Alroy 2002; 2Gingerich 1994; 3Gingerich and Simons 1977; 4Krishtalka and Stucky 1985