MP-163 (Eocene of the United States)

Where: Park County, Wyoming (44.6° 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)

• 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: P. D. Gingerich and H. A. Deutsch. 1989. Systematics and Evolution of Early Eocene Hyaenodontidae (Mammalia, Creodonta) in the Clarks Fork Basin, Wyoming. Contributions from the Museum of Paleontology, University of Michigan 27(13):327-391 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 15704: authorized by John Alroy, entered by John Alroy on 12.04.1997, edited by Leah Gannon and Will Clyde

Creative Commons license: CC BY (attribution)

Taxonomic list

• may be in Big Horn County, Wa-4
Mammalia
 Primates - Notharctidae
Cantius trigonodus1 Matthew 1915 primate
 Perissodactyla -
"Hyracotherium ? cristatum" = Systemodon tapirinus1, Homogalax protapirinus1
"Hyracotherium ? cristatum" = Systemodon tapirinus1 Cope 1875 odd-toed ungulate
Homogalax protapirinus1 Wortman 1896 odd-toed ungulate
 Perissodactyla - Equidae
"Hyracotherium pernix" = Arenahippus pernix1
"Hyracotherium pernix" = Arenahippus pernix1 Marsh 1876 horse
 Theriamorpha - Phenacodontidae
Ectocion osbornianus1 Cope 1882 condylarth
Phenacodus intermedius1 Granger 1915 condylarth
 Artiodactyla - Diacodexeidae
Diacodexis metsiacus1 Cope 1882 even-toed ungulate
 Creodonta - Oxyaenidae
Oxyaena sp.1 Cope 1874 creodont
 Creodonta - Hyaenodontidae
Prototomus robustus Matthew and Granger 1915 creodont
 Acreodi - Mesonychidae
Pachyaena ossifraga1 Cope 1874 condylarth
 Condylarthra - Hyopsodontidae
Hyopsodus latidens1 Denison 1937 condylarth
 Macroscelidea - Apheliscidae
Haplomylus scottianus2 Gingerich 1994 elephant shrew
 Cimolesta - Coryphodontidae
Coryphodon armatus1 Cope 1872 pantodont
Coryphodon lobatus1 Cope 1877 pantodont
 Cimolesta - Esthonychidae
Esthonyx bisulcatus1 Cope 1874 tillodont
Reptilia
 Testudines -
Testudines indet.1 Batsch 1788 turtle
 Crocodylia - Alligatoridae
Allognathosuchus sp.1 Mook 1921 crocodilian