Elk Creek (690 m) (Eocene of the United States)

Also known as YPM 24, 32

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 15567: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• 611 m in revised section
Mammalia
 Primates - Microsyopidae
Microsyopidae indet.1 Osborn and Wortman 1892 primate
 Primates - Omomyidae
Absarokius metoecus2 Bown and Rose 1987 tarsier
 Primates - Notharctidae
Cantius sp.1 Simons 1962 primate
 Perissodactyla - Brontotheriidae
Lambdotherium popoagicum1 Cope 1880 brontothere
 Perissodactyla -
Heptodon posticus Cope 1882 odd-toed ungulate
 Perissodactyla - Equidae
"Hyracotherium grangeri" = Sifrhippus grangeri, "Hyracotherium pernix" = Arenahippus pernix
"Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse
"H. sp. 1"
"Hyracotherium pernix" = Arenahippus pernix Marsh 1876 horse
"H. sp. 3"
 Creodonta - Oxyaenidae
Ambloctonus sinosus1 Cope 1875 creodont
 Ferae - Viverravidae
Didymictis sp. Cope 1875 placental
"curtidens/lysitensis"
 Trogontia - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
Megalesthonyx hopsoni Rose 1971 tillodont
 Ungulata - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
"latidens/miticulus"
 Ungulata - Diacodexeidae
"Bunophorus" macropternus Cope 1882 even-toed ungulate
 Ungulata - Phenacodontidae
Phenacodus vortmani Cope 1880 condylarth
 Hyaenodonta -
Prolimnocyon antiquus Matthew and Granger 1915 eutherian