MP-181 (Eocene of the United States)

Where: Wyoming (44.5° N, 108.7° W: paleocoordinates 49.3° N, 91.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Willwood Formation, Wasatchian (55.8 - 50.3 Ma)

• Wa-5

• 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: W. C. Clyde. 1997. Stratigraphy and mammalian paleontology of the McCullough Peaks, northern Bighorn Basin, Wyoming: Implications for biochronology, basin development, and community reorganization across the Paleocene-Eocene boundary. PhD Thesis, University of Michigan [W. Clyde/W. Clyde/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 46755: authorized by Will Clyde, entered by Will Clyde on 24.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Squamata -
Mammalia
 Theriamorpha - Leptictidae
Palaeictops bicuspis Cope 1880 eutherian
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
 Condylarthra - Hyopsodontidae
Hyopsodus simplex Loomis 1905 condylarth
 Theriamorpha - Viverravidae
Didymictis sp. Cope 1875 placental
 Theriamorpha -
Vassacyon promicrodon Wortman and Matthew 1899 placental
 Perissodactyla - Equidae
"Hyracotherium pernix" = Arenahippus pernix
"Hyracotherium pernix" = Arenahippus pernix Marsh 1876 horse
 Perissodactyla -
"Hyracotherium cristatum" = Systemodon tapirinus
"Hyracotherium cristatum" = Systemodon tapirinus Cope 1875 odd-toed ungulate
 Artiodactyla - Diacodexeidae
Bunophorus small sp. Sinclair 1914 even-toed ungulate
 Primates - Notharctidae
Cantius abditus Gingerich and Simons 1977 primate
Actinopteri
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp. Agassiz 1843 gar