Elk Creek (710 m) (Eocene of the United States)

Also known as YPM 17+

Where: Big Horn County, Wyoming (44.5° N, 108.0° W: paleocoordinates 49.2° N, 90.8° W)

• coordinate based on political unit

• small collection-level geographic resolution

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 15568: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Rodentia - Ischyromyidae
Paramys cf. copei Loomis 1907 rodent
 Perissodactyla - Brontotheriidae
Lambdotherium popoagicum Cope 1880 brontothere
 Perissodactyla - Equidae
"Hyracotherium grangeri" = Sifrhippus grangeri
"Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse
"H. sp. 1"
 Condylarthra - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
"latidens/miticulus"
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
"2"
 Cimolesta - Esthonychidae
Megalesthonyx hopsoni Rose 1971 tillodont