Elk Creek (470 m) (Eocene of the United States)

Also known as YPM 248, 251, 268

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. University of Michigan Papers on Paleontology 24 [J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 15544: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Primates - Notharctidae
Cantius abditus1 Gingerich and Simons 1977 primate
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
"2"
 Leptictida - Leptictidae
Prodiacodon tauricinerei Jepsen 1930 eutherian
 Rodentia - Ischyromyidae
Paramys cf. excavatus Loomis 1907 rodent
cf. Mytonomys coloradensis1 Wood 1962 rodent
 Lipotyphla - Geolabididae
Centetodon neashami n. sp.2 Bown and Schankler 1982 placental
YPM 251; "C. sp. 1/2"
 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"
 Ferae - Viverravidae
Didymictis sp. Cope 1875 placental
"curtidens/lysitensis"
Viverravus sp. Marsh 1872 placental
"V. acutus/gracilis"
 Trogontia - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
 Tribosphenida - Arctocyonidae
Thryptacodon antiquus Matthew and Granger 1915 condylarth
 Ungulata - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
"loomisi/minor"
 Ungulata - Diacodexeidae
Bunophorus sp.1 Sinclair 1914 even-toed ungulate
Bunophorus robustus1 Sinclair 1914 even-toed ungulate
Diacodexis sp.1 Cope 1882 even-toed ungulate
 Ungulata - Phenacodontidae
Phenacodus vortmani Cope 1880 condylarth
 Hyaenodonta -
Prolimnocyon atavus Matthew and Granger 1915 eutherian