MP-284 (Eocene of the United States)

Where: Wyoming (44.6° N, 108.7° W: paleocoordinates 49.4° N, 91.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• Wa-4

• 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 46845: 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 - Coryphodontidae
Coryphodon radians Cope 1872 pantodont
 Primates - Notharctidae
Cantius trigonodus Matthew 1915 primate
 Rodentia - Ischyromyidae
Paramys copei Loomis 1907 rodent
Paramys taurus Korth 1984 rodent
 Perissodactyla -
Homogalax protapirinus Wortman 1896 odd-toed ungulate
 Perissodactyla - Equidae
"Hyracotherium pernix" = Arenahippus pernix
"Hyracotherium pernix" = Arenahippus pernix Marsh 1876 horse
 Macroscelidea - Apheliscidae
Haplomylus scottianus Gingerich 1994 elephant shrew
 Tillodontia - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
 Ungulata - Hyopsodontidae
Hyopsodus latidens Denison 1937 condylarth
 Ungulata - Diacodexeidae
Diacodexis metsiacus Cope 1882 even-toed ungulate
 Hyaenodonta -
Didelphodus absarokae Cope 1881 eutherian