MP-220 (Eocene of the United States)

Where: Wyoming (44.7° N, 108.8° W: paleocoordinates 49.5° N, 91.6° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• Wa-3

• 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 46789: authorized by Will Clyde, entered by Will Clyde on 24.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Loricata -
"Crocodilia indet." = Crocodylia
"Crocodilia indet." = Crocodylia Owen 1842 crocodilian
Mammalia
 Cimolesta - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
 Cimolesta - Coryphodontidae
Coryphodon radians Cope 1872 pantodont
Coryphodon eocaenus Owen 1846 pantodont
 Condylarthra - Hyopsodontidae
Hyopsodus loomisi McKenna 1960 condylarth
 Creodonta - Hyaenodontidae
Arfia opisthotoma Matthew 1901 creodont
 Theriamorpha - Viverravidae
Didymictis protenus Cope 1874 placental
 Acreodi - Mesonychidae
Pachyaena sp. Cope 1874 condylarth
 Theriamorpha - Phenacodontidae
Phenacodus intermedius Granger 1915 condylarth
 Perissodactyla - Equidae
"Hyracotherium aemulor" = Arenahippus aemulor
"Hyracotherium aemulor" = Arenahippus aemulor Gingerich 1991 horse
 Perissodactyla -
Homogalax protapirinus Wortman 1896 odd-toed ungulate
 Rodentia - Ischyromyidae
Paramys sp. Leidy 1871 rodent
 Primates - Notharctidae
Cantius mckennai Gingerich and Simons 1977 primate