MP-194 (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-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 46767: authorized by Will Clyde, entered by Will Clyde on 24.01.2005, edited by John Alroy

Creative Commons license: CC BY (attribution)

Taxonomic list

Actinopteri
 Acipenseriformes - Acipenseridae
? Acipenseridae indet. Bonaparte 1831
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp. Agassiz 1843 gar
Reptilia
 Testudines - Trionychidae
Trionychidae indet. Gray 1825 softshell turtle
 Loricata -
"Crocodilia indet." = Crocodylia
"Crocodilia indet." = Crocodylia Owen 1842 crocodilian
Mammalia
 Primates - Microsyopidae
Microsyops angustidens Matthew 1915 primate
 Primates - Notharctidae
Cantius abditus Gingerich and Simons 1977 primate
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
 Cimolesta - Pantolestidae
Palaeosinopa veterrima Matthew 1901 eutherian
 Glires -
 Perissodactyla -
Homogalax protapirinus Wortman 1896 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
 Ferae - Viverravidae
Didymictis protenus Cope 1874 placental
 Carnivora - Miacidae
Miacis exiguus Matthew and Granger 1915 carnivoran
 Carnivora -
Vulpavus australis Matthew and Granger 1915 carnivoran
 Trogontia - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
 Tribosphenida - Arctocyonidae
? Thryptacodon antiquus Matthew and Granger 1915 condylarth
 Ungulata - Hyopsodontidae
Hyopsodus simplex Loomis 1905 condylarth
 Ungulata - Diacodexeidae
Diacodexis metsiacus Cope 1882 even-toed ungulate
 Ungulata - Phenacodontidae
Phenacodus trilobatus Cope 1881 condylarth
Phenacodus intermedius Granger 1915 condylarth