MP-81 (Eocene of the United States)

Where: Park County, Wyoming (44.5° N, 108.8° W: paleocoordinates 49.1° N, 92.2° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Willwood Formation, Early/Lower Eocene (55.8 - 48.6 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; lithified siliciclastic sediments

Size classes: macrofossils, mesofossils

Reposited in the UMMP

Collection methods: surface (float), surface (in situ),

Primary reference: P. D. Gingerich and H. A. Deutsch. 1989. Systematics and Evolution of Early Eocene Hyaenodontidae (Mammalia, Creodonta) in the Clarks Fork Basin, Wyoming. Contributions from the Museum of Paleontology, University of Michigan 27(13):327-391 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 15691: authorized by John Alroy, entered by John Alroy on 21.09.1998, edited by Leah Gannon and Will Clyde

Creative Commons license: CC BY (attribution)

Taxonomic list

• may be in Big Horn County, Wa-6
Mammalia
 Cimolesta - Coryphodontidae
Coryphodon eocaenus1 Owen 1846 pantodont
 Condylarthra - Hyopsodontidae
Hyopsodus miticulus1 Cope 1874 condylarth
Hyopsodus minor1 Loomis 1905 condylarth
 Creodonta - Hyaenodontidae
Tritemnodon strenuus Cope 1875 creodont
 Theriamorpha - Viverravidae
Viverravus sp.1 Marsh 1872 placental
Viverravus acutus2 Matthew and Granger 1915 placental
 Perissodactyla - Palaeotheriidae
Hyracotherium sp.1 Owen 1841 odd-toed ungulate
 Perissodactyla -
? Heptodon sp.1 Cope 1882 odd-toed ungulate
 Artiodactyla - Diacodexeidae
Diacodexis metsiacus1 Cope 1882 even-toed ungulate
 Rodentia - Ischyromyidae
Paramys sp.1 Leidy 1871 rodent
 Primates - Notharctidae
Cantius abditus1 Gingerich and Simons 1977 primate
 Primates - Microsyopidae
Microsyops latidens1 Cope 1882 primate