MP-273 (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 46834: authorized by Will Clyde, entered by Will Clyde on 24.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Theriamorpha - Leptictidae
Palaeictops bicuspis Cope 1880 eutherian
 Rodentia - Ischyromyidae
Paramys copei Loomis 1907 rodent
Acritoparamys atwateri Loomis 1907 rodent
 Primates - Microsyopidae
"Haplomylus speirianus" = Microsyops speirianus
"Haplomylus speirianus" = Microsyops speirianus Cope 1880 primate
 Primates - Notharctidae
Cantius mckennai Gingerich and Simons 1977 primate
 Primates - Omomyidae
Tetonius matthewi Bown and Rose 1987 tarsier
originally entered as "Tetonius mathewi"
 Perissodactyla -
Cardiolophus radinskyi Gingerich 1991 odd-toed ungulate
Homogalax protapirinus Wortman 1896 odd-toed ungulate
 Perissodactyla - Equidae
"Hyracotherium aemulor" = Arenahippus aemulor
"Hyracotherium aemulor" = Arenahippus aemulor Gingerich 1991 horse
 Theriamorpha - Phenacodontidae
Ectocion osbornianus Cope 1882 condylarth
 Artiodactyla - Diacodexeidae
Diacodexis metsiacus Cope 1882 even-toed ungulate
 Creodonta - Oxyaenidae
Oxyaena intermedia Denison 1938 creodont
Oxyaena gulo Matthew and Granger 1915 creodont
 Creodonta - Hyaenodontidae
Prototomus phobos Gingerich and Deutsch 1989 creodont
? Galecyon mordax Matthew and Granger 1915 creodont
 Theriamorpha - Metacheiromyidae
Palaeanodon ignavus Matthew 1918 placental
 Condylarthra - Hyopsodontidae
Hyopsodus latidens Denison 1937 condylarth
 Macroscelidea - Apheliscidae
Apheliscus wapitiensis Van Valen 1967 elephant shrew
 Cimolesta - Coryphodontidae
Coryphodon radians Cope 1872 pantodont
 Cimolesta - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
Reptilia
 Crocodylia - Alligatoridae
Allognathosuchus sp. Mook 1921 crocodilian