Elk Creek (610 m) (Eocene of the United States)

Also known as YPM 174, 175, 176, 185, 191, USGS D-1567

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 15557: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• YPM 185, 191 and USGS D-1567 are in Big Horn County, the others are in Washakie County
Mammalia
 Theriamorpha - Leptictidae
Palaeictops bicuspis Cope 1880 eutherian
 Theriamorpha - Stylinodontidae
Ectoganus gliriformis1 Cope 1874 taeniodont
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
"2"
 Cimolesta - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
Esthonyx acutidens Cope 1881 tillodont
 Condylarthra - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
"latidens/miticulus"
Hyopsodus powellianus Cope 1884 condylarth
 Theriamorpha - Metacheiromyidae
Palaeanodon ignavus Matthew 1918 placental
 Creodonta - Hyaenodontidae
Prototomus sp. Cope 1874 creodont
"1"
 Creodonta - Oxyaenidae
Oxyaena sp. Cope 1874 creodont
"intermedia/forcipata"
 Theriamorpha -
Miacis sp.1 Cope 1872 placental
Vassacyon promicrodon Wortman and Matthew 1899 placental
Vulpavus canavus Cope 1881 placental
Vulpavus australis Matthew and Granger 1915 placental
Uintacyon asodes Gazin 1952 placental
 Theriamorpha - Viverravidae
Viverravus sp. Marsh 1872 placental
"V. acutus/gracilis"
Didymictis sp. Cope 1875 placental
"curtidens/lysitensis"
 Theriamorpha -
Oodectes sp.1 Wortman 1901 placental
 Perissodactyla - Equidae
"Hyracotherium pernix" = Arenahippus pernix, "Hyracotherium grangeri" = Sifrhippus grangeri, "Hyracotherium cf. index" = Minippus index
"Hyracotherium pernix" = Arenahippus pernix Marsh 1876 horse
"H. sp. 3"
"Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse
"H. sp. 1"
"Hyracotherium cf. index" = Minippus index Cope 1873 horse
 Perissodactyla -
Heptodon calciculus Cope 1880 odd-toed ungulate
at YPM 175: Bown and Gingerich 1972
 Theriamorpha - Phenacodontidae
Phenacodus vortmani Cope 1880 condylarth
 Artiodactyla - Diacodexeidae
Bunophorus sp.1 Sinclair 1914 even-toed ungulate
"Bunophorus" macropternus Cope 1882 even-toed ungulate
Diacodexis sp.1 Cope 1882 even-toed ungulate
Diacodexis secans Cope 1881 even-toed ungulate
this is probably correct, see Krishtalka and Stucky 1985
 Rodentia - Sciuravidae
Sciuravidae indet. Miller and Gidley 1918 rodent
"1"
cf. Knightomys depressus Loomis 1907 rodent
 Rodentia - Ischyromyidae
Paramys cf. excavatus Loomis 1907 rodent
Paramys cf. copei Loomis 1907 rodent
 Primates - Notharctidae
Cantius abditus1 Gingerich and Simons 1977 primate
Cantius nunienus1 Cope 1881 primate
 Primates - Omomyidae
Absarokius abbotti Loomis 1906 tarsier
OK, B & R 87: Y-174, 175, 176, 185, USGS D-1567
 Primates - Microsyopidae
Microsyopidae indet.1 Osborn and Wortman 1892 primate
Niptomomys thelmae2 Gunnell and Gingerich 1981 primate
 Primates - Paromomyidae
Phenacolemurinae indet. Simpson 1955 primate
"Phenacolemur sp. 1"