Elk Creek (410 m) (Eocene of the United States)

Also known as YPM 50, 226, 262, 263, 264; USGS D-1411 (412 m)

Where: Big Horn County, Wyoming (44.5° N, 108.0° W: paleocoordinates 49.2° N, 90.8° 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 15536: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• USGS D-1411 is from Washakie County
Show authors, comments, and common names
Aves
 Diatrymiformes - Diatrymidae
Diatryma gigantea3
Diatryma gigantea3 Cope 1876 bird
Mammalia
 Cimolesta - Esthonychidae
Esthonyx bisulcatus
Esthonyx bisulcatus Cope 1874 tillodont
 Condylarthra - Hyopsodontidae
Hyopsodus sp.
Hyopsodus sp. Leidy 1870 condylarth
"loomisi/minor"
 Primates - Paromomyidae
Phenacolemurinae indet.1
Phenacolemurinae indet.1 Simpson 1955 primate
 Primates - Notharctidae
Cantius sp.1, Cantius abditus1
Cantius sp.1 Simons 1962 primate
Cantius abditus1 Gingerich and Simons 1977 primate
 Creodonta - Hyaenodontidae
Prototomus sp., Tritemnodon strenuus1
Prototomus sp. Cope 1874 creodont
"1"
Tritemnodon strenuus1 Cope 1875 creodont
 Ferae - Viverravidae
Didymictis sp.
Didymictis sp. Cope 1875 placental
"curtidens/lysitensis"
 Acreodi - Mesonychidae
Pachyaena ossifraga2
Pachyaena ossifraga2 Cope 1874 condylarth
USGS D-1411
 Tribosphenida - Phenacodontidae
Phenacodus sp.1, Copecion brachypternus1
Phenacodus sp.1 Cope 1873 condylarth
Copecion brachypternus1 Cope 1882 condylarth
 Perissodactyla - Equidae
"Hyracotherium grangeri" = Sifrhippus grangeri, "Hyracotherium aemulor" = Arenahippus aemulor
"Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse
"H. sp. 1"
"Hyracotherium aemulor" = Arenahippus aemulor Gingerich 1991 horse
"H. sp. 2"
 Artiodactyla - Diacodexeidae
Diacodexis sp.1
Diacodexis sp.1 Cope 1882 even-toed ungulate
1Alroy 2002; 2O'Leary and Rose 1995; 3Witmer and Rose 1991