MP-187 (Eocene of the United States)

Where: Wyoming (44.6° N, 108.8° W: paleocoordinates 49.4° N, 91.6° 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 46761: authorized by Will Clyde, entered by Will Clyde on 24.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Actinopteri
 Amiiformes - Amiidae
Amia sp. Linnaeus 1766 bowfin
Reptilia
 Testudines -
Testudines indet. Batsch 1788 turtle
 Loricata -
"Crocodilia indet." = Crocodylia
"Crocodilia indet." = Crocodylia Owen 1842 crocodilian
Mammalia
 Cimolesta - Coryphodontidae
Coryphodon lobatus Cope 1877 pantodont
 Cimolesta - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
 Primates - Notharctidae
Cantius trigonodus Matthew 1915 primate
 Glires -
Rodentia indet. Savage 1951 rodent
 Condylarthra - Hyopsodontidae
Hyopsodus latidens Denison 1937 condylarth
 Tribosphenida - Phenacodontidae
Ectocion osbornianus Cope 1882 condylarth
Copecion brachypternus Cope 1882 condylarth
Phenacodus intermedius Granger 1915 condylarth
 Perissodactyla -
Homogalax protapirinus Wortman 1896 odd-toed ungulate
Cardiolophus semihians Cope 1882 odd-toed ungulate
 Perissodactyla - Equidae
"Hyracotherium pernix" = Arenahippus pernix, "Hyracotherium cristatum" = Eohippus cristatus
"Hyracotherium pernix" = Arenahippus pernix Marsh 1876 horse
"Hyracotherium cristatum" = Eohippus cristatus Wortman 1896 horse
 Creodonta - Oxyaenidae
Oxyaena forcipata Cope 1874 creodont
 Ferae - Viverravidae
Didymictis protenus Cope 1874 placental
 Artiodactyla - Diacodexeidae
Diacodexis metsiacus Cope 1882 even-toed ungulate