PBDB Collection

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

Show authors, comments, and common names

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

¹Alroy 2002; ²Gunnell and Gingerich 1981