MP-15 (Eocene of the United States)

Where: Park County, Wyoming (44.5° N, 108.5° W: paleocoordinates 49.1° N, 91.9° 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 15681: 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-4
Mammalia
 Cimolesta - Coryphodontidae
Coryphodon eocaenus1 Owen 1846 pantodont
 Condylarthra - Hyopsodontidae
Hyopsodus sp.1 Leidy 1870 condylarth
 Ferae - Viverravidae
Didymictis leptomylus1 Cope 1880 placental
Didymictis protenus2 Cope 1874 placental
 Creodonta - Hyaenodontidae
Prototomus secundarius Cope 1875 creodont
 Perissodactyla - Equidae
"Hyracotherium pernix" = Arenahippus pernix1
"Hyracotherium pernix" = Arenahippus pernix1 Marsh 1876 horse
 Perissodactyla -
Homogalax protapirinus1 Wortman 1896 odd-toed ungulate
 Primates - Notharctidae
Cantius trigonodus1 Matthew 1915 primate
Reptilia
 Squamata - Anguidae
Melanosaurus sp.1 Gilmore 1928 squamates