MP-154 (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 46736: authorized by Will Clyde, entered by Will Clyde on 24.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Placentalia -
Rodentia indet. Bowdich 1821 rodent
 Primates - Microsyopidae
Microsyops cardiorestes Gunnell 1989 primate
 Primates - Notharctidae
Cantius abditus Gingerich and Simons 1977 primate
 Perissodactyla -
Cardiolophus semihians Cope 1882 odd-toed ungulate
"Hyracotherium cristatum" = Systemodon tapirinus Cope 1875 odd-toed ungulate
Homogalax protapirinus Wortman 1896 odd-toed ungulate
 Perissodactyla - Equidae
"Hyracotherium pernix" = Arenahippus pernix
"Hyracotherium pernix" = Arenahippus pernix Marsh 1876 horse
 Theriamorpha - Phenacodontidae
Phenacodus trilobatus Cope 1881 condylarth
Phenacodus intermedius Granger 1915 condylarth
 Artiodactyla - Diacodexeidae
Diacodexis metsiacus Cope 1882 even-toed ungulate
 Creodonta - Oxyaenidae
Palaeonictis occidentalis Osborn 1892 creodont
 Theriamorpha - Viverravidae
Didymictis protenus Cope 1874 placental
Viverravus acutus Matthew and Granger 1915 placental
 Theriamorpha -
Vulpavus australis Matthew and Granger 1915 placental
 Condylarthra - Hyopsodontidae
Hyopsodus simplex Loomis 1905 condylarth
 Cimolesta - Coryphodontidae
Coryphodon armatus Cope 1872 pantodont
 Cimolesta - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
Reptilia
 Testudines -
Testudines indet. Batsch 1788 turtle
 Squamata -
 Crocodylia - Alligatoridae
Allognathosuchus sp. Mook 1921 crocodilian
Actinopteri
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp. Agassiz 1843 gar