Elk Creek (540 m) (Eocene of the United States)

Also known as YPM 47, USGS D-1507 (535 m), 1508 (535 m)

Where: Washakie County, Wyoming (44.0° N, 108.0° W: paleocoordinates 48.7° N, 90.9° 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 15549: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• USGS sites are listed at 494 m (= old 573 m) by Bown et al. 1994; I am not sure how to resolve this
possibly relevant: Absarokius abbotti Bown and Rose 1987: USGS D-1507, 1508 Absarokius metoecus Bown and Rose 1987: USGS D-1507, 1508
Mammalia
 Primates - Notharctidae
Cantius abditus Gingerich and Simons 1977 primate
 Placentalia -
Perissodactyla indet. Owen 1848 odd-toed ungulate
"1"
 Perissodactyla - Equidae
"Hyracotherium aemulor" = Arenahippus aemulor, "Hyracotherium grangeri" = Sifrhippus grangeri
"Hyracotherium aemulor" = Arenahippus aemulor Gingerich 1991 horse
"H. sp. 2"
"Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse
"H. sp. 1"
 Theriamorpha - Phenacodontidae
Phenacodus sp. Cope 1873 condylarth
 Artiodactyla - Diacodexeidae
Diacodexis sp. Cope 1882 even-toed ungulate
Bunophorus sp. Sinclair 1914 even-toed ungulate
 Creodonta - Oxyaenidae
Oxyaena sp. Cope 1874 creodont
"intermedia/forcipata"
 Theriamorpha -
Miacis sp. Cope 1872 placental
 Condylarthra - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
"latidens/miticulus"
Hyopsodus sp. Leidy 1870 condylarth
"loomisi/minor"
 Cimolesta - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont