MP-286 (Eocene of the United States)

Where: Wyoming (44.4° 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-6

• 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 46847: authorized by Will Clyde, entered by Will Clyde on 24.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

 Condylarthra - Hyopsodontidae
Hyopsodus minor Loomis 1905 condylarth
 Macroscelidea - Apheliscidae
Apheliscus insidiosus Cope 1874 elephant shrew
 Primates - Notharctidae
Cantius abditus Gingerich and Simons 1977 primate
 Primates - Microsyopidae
Microsyops latidens Cope 1882 primate
 Primates - Omomyidae
Absarokius metoecus Bown and Rose 1987 tarsier
originally entered as "Absarokius motoecus"
 Rodentia - Ischyromyidae
Paramys v. large sp. Leidy 1871 rodent
Paramys taurus Korth 1984 rodent
Paramys copei Loomis 1907 rodent
 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
 Theriamorpha - Phenacodontidae
Phenacodus vortmani Cope 1880 condylarth
 Artiodactyla - Diacodexeidae
Diacodexis metsiacus, "Diacodexis robustus" = Bunophorus robustus
Diacodexis metsiacus Cope 1882 even-toed ungulate
"Diacodexis robustus" = Bunophorus robustus Sinclair 1914 even-toed ungulate
 Theriamorpha - Viverravidae
Didymictis protenus Cope 1874 placental
Viverravus acutus Matthew and Granger 1915 placental
 Theriamorpha -
Vassacyon promicrodon Wortman and Matthew 1899 placental
 Cimolesta - Coryphodontidae
Coryphodon armatus Cope 1872 pantodont
 Cimolesta - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
 Squamata -