MP-42 (Eocene of the United States)

Where: Park County, Wyoming (44.4° N, 108.7° W: paleocoordinates 49.0° N, 92.1° 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. Polly. 1997. Ancestry and Species Definition in Paleontology: A Stratocladistic Analysis of Paleocene-Eocene Viverravidae (Mammalia, Carnivora) from Wyoming. Contributions from the Museum of Paleontology, University of Michigan 30(1):1-53 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 15685: 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
 Primates - Microsyopidae
Microsyops latidens Cope 1882 primate
 Primates - Notharctidae
Cantius abditus Gingerich and Simons 1977 primate
 Perissodactyla - Equidae
"Hyracotherium pernix" = Arenahippus pernix
"Hyracotherium pernix" = Arenahippus pernix Marsh 1876 horse
 Theriamorpha - Phenacodontidae
Phenacodus vortmani Cope 1880 condylarth
 Artiodactyla - Diacodexeidae
Bunophorus etsagicus Cope 1882 even-toed ungulate
 Theriamorpha - Viverravidae
Didymictis protenus Cope 1874 placental
Viverravus acutus Matthew and Granger 1915 placental
 Condylarthra - Hyopsodontidae
Hyopsodus minor Loomis 1905 condylarth
Hyopsodus lysitensis Gingerich 1974 condylarth
Reptilia
 Testudines -
Testudines indet. Batsch 1788 turtle