Elk Creek (180 m) (Eocene of the United States)

Also known as YPM 87, 88, 98, 101, 144, 215W, 345, 377, 388, 408; USGS D-1224 (=UW V-73125), 1225

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

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 15514: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• YPM localities are in Big Horn County, two USGS localities are in Washakie County
note: Y-215W originally placed at 190 m, placed at 180 m by Bown and Rose (1987)
Mammalia
 Primates - Microsyopidae
Microsyopidae indet.1 Osborn and Wortman 1892 primate
 Primates - Omomyidae
Tetonius matthewi n. sp.2 Bown and Rose 1987 tarsier
Teilhardina crassidens n. sp.2 Bown and Rose 1987 tarsier
 Primates - Notharctidae
Cantius sp.1 Simons 1962 primate
 Cimolesta - Coryphodontidae
Coryphodon "sp. 2" Owen 1845 pantodont
"2"
Coryphodon "sp. 1" Owen 1845 pantodont
"1"
 Leptictida - Leptictidae
Prodiacodon tauricinerei Jepsen 1930 eutherian
 Rodentia - Sciuravidae
cf. Knightomys depressus Loomis 1907 rodent
 Rodentia - Ischyromyidae
Paramys cf. excavatus Loomis 1907 rodent
 Perissodactyla - Equidae
"Arenahippus grangeri" = Sifrhippus grangeri4
"Arenahippus grangeri" = Sifrhippus grangeri4 Gingerich 1989 horse
"H. sp. 2"
 Tribosphenida -
Talpavoides dartoni3 Bown and Schankler 1982 placental
 Ferae - Viverravidae
Didymictis leptomylus Cope 1880 placental
Viverravus "acutus/gracilis" Marsh 1872 placental
"V. acutus/gracilis"
Viverravus sp. Marsh 1872 placental
"2"
 Ferae -
Uintacyon massetericus Cope 1882 placental
 Macroscelidea - Apheliscidae
Haplomylus speirianus Cope 1880 elephant shrew
Apheliscus sp. Cope 1875 elephant shrew
"wapitiensis/insidiosus"
 Macroscelidea - Amphilemuridae
Macrocranion nitens Matthew 1918 elephant shrew
 Trogontia - Esthonychidae
Esthonyx spatularius Cope 1880 tillodont
 Tribosphenida - Arctocyonidae
Thryptacodon antiquus Matthew and Granger 1915 condylarth
 Ungulata - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
"loomisi/minor"
 Ungulata - Diacodexeidae
Diacodexis sp.1 Cope 1882 even-toed ungulate
 Ungulata - Phenacodontidae
Ectocion osbornianus Cope 1882 condylarth
Phenacodus intermedius Granger 1915 condylarth
Phenacodus vortmani Cope 1880 condylarth
 Acreodi - Mesonychidae
Pachyaena ossifraga Cope 1874 condylarth
 Hyaenodonta - Hyaenodontidae
Tritemnodon sp. Matthew 1906 eutherian
"1"
Arfia sp.1 Van Valen 1965 eutherian