Elk Creek (80 m) (Eocene of the United States)

Also known as YPM 200; UW V-73129 = USGS D-1228 (see Rose and Bown 1982)

Where: Washakie County, Wyoming (44.0° N, 108.0° W: paleocoordinates 48.7° N, 90.9° W)

• coordinate based on political unit

When: Willwood Formation, Wasatchian (55.8 - 50.3 Ma)

Environment/lithology: terrestrial

Primary reference: D. M. Schankler. 1980. Faunal Zonation of the Willwood Formation in the Central Bighorn Basin, Wyoming. University of Michigan Papers on Paleontology 24:99-114 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 15503: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Cimolesta -
"Esthonyx grangeri" = Azygonyx grangeri
"Esthonyx grangeri" = Azygonyx grangeri Simpson 1937 tillodont
 Condylarthra - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
"loomisi/minor"
 Creodonta - Oxyaenidae
Palaeonictis occidentalis Osborn 1892 creodont
 Creodonta - Hyaenodontidae
Prototomus sp. Cope 1874 creodont
"1"
 Theriamorpha - Viverravidae
Didymictis leptomylus Cope 1880 placental
 Theriamorpha - Phenacodontidae
Ectocion osbornianus Cope 1882 condylarth
 Perissodactyla - Equidae
"Hyracotherium grangeri" = Sifrhippus grangeri
"Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse
"H. sp. 1"
 Artiodactyla - Diacodexeidae
Diacodexis sp.1 Cope 1882 even-toed ungulate
 Rodentia - Ischyromyidae
Paramys cf. excavatus Loomis 1907 rodent
 Primates - Micromomyidae
Tinimomys graybulliensis3 Szalay 1974 primate
USGS D-1228
 Primates - Omomyidae
Teilhardina sp.2 Simpson 1940 tarsier
T. crassidens-americana intergrade; USGS D-1228, UW V-73129
 Primates - Microsyopidae
"Haplomylus speirianus" = Microsyops speirianus
"Haplomylus speirianus" = Microsyops speirianus Cope 1880 primate
 Primates - Notharctidae
Cantius sp.1 Simons 1962 primate