Elk Creek (190 m) (Eocene of the United States)

Also known as YPM 111, 140, 214, 363 (= USGS 2151)

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 15516: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• note: Y-215W was placed at this level by Schankler but is at 180 m, see Bown and Rose 1987
Mammalia
 Primates - Microsyopidae
Microsyopidae indet.1 Osborn and Wortman 1892 primate
 Primates - Omomyidae
Tetonius matthewi2 Bown and Rose 1987 tarsier
Teilhardina crassidens2 Bown and Rose 1987 tarsier
 Primates - Notharctidae
Cantius sp.1 Simons 1962 primate
 Primates - Paromomyidae
Phenacolemurinae indet.1 Simpson 1955 primate
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
"2"
Coryphodon sp. Owen 1845 pantodont
"1"
 Cimolesta - Palaeoryctidae
cf. Pararyctes sp.3 Van Valen 1966 eutherian
"Pararyctes sp. 1" from YM 363
Palaeoryctes sp.3 Matthew 1913 eutherian
 Leptictida - Leptictidae
Prodiacodon tauricinerei Jepsen 1930 eutherian
 Rodentia - Sciuravidae
cf. Knightomys minor1 Wood 1965 rodent
 Rodentia - Ischyromyidae
Paramys cf. excavatus Loomis 1907 rodent
Paramys cf. copei Loomis 1907 rodent
 Perissodactyla - Equidae
"Hyracotherium aemulor" = Arenahippus aemulor
"Hyracotherium aemulor" = Arenahippus aemulor Gingerich 1991 horse
"H. sp. 2"
 Creodonta - Oxyaenidae
Oxyaena sp. Cope 1874 creodont
"intermedia/forcipata"
Oxyaena gulo Matthew and Granger 1915 creodont
 Ferae - Viverravidae
Didymictis leptomylus Cope 1880 placental
Viverravus sp. Marsh 1872 placental
"V. acutus/gracilis"
Viverravus sp. Marsh 1872 placental
"3"
 Ferae -
Vassacyon promicrodon Wortman and Matthew 1899 placental
 Carnivora - Miacidae
Miacis sp.1 Cope 1872 carnivoran
 Macroscelidea - Apheliscidae
Haplomylus speirianus Cope 1880 elephant shrew
Apheliscus sp. Cope 1875 elephant shrew
"wapitiensis/insidiosus"
 Trogontia - Esthonychidae
Esthonyx spatularius Cope 1880 tillodont
 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
Copecion brachypternus1 Cope 1882 condylarth
Phenacodus intermedius Granger 1915 condylarth
Phenacodus vortmani Cope 1880 condylarth
 Insectivora - Apatemyidae
Labidolemur kayi1 Simpson 1929 insectivoran
 Hyaenodonta -
Prolimnocyon atavus Matthew and Granger 1915 eutherian
 Hyaenodonta - Hyaenodontidae
Prototomus sp. Cope 1874 eutherian
"1"
Tritemnodon sp. Matthew 1906 eutherian
"1"
Arfia sp.1 Van Valen 1965 eutherian
 Theriiformes - Herpetotheriidae
"Copedelphys innominata" = Herpetotherium innominatum1
"Copedelphys innominata" = Herpetotherium innominatum1 Simpson 1928 marsupial