PBDB Collection

Elk Creek (270 m) (Eocene of the United States)

Also known as YPM 286, 294, USGS D-1241

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. 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 15522: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• USGS D-1241 is in Washakie County

Show authors, comments, and common names

Mammalia
Theriamorpha - Leptictidae	Prodiacodon tauricinerei, Didelphodus absarokae Prodiacodon tauricinerei Jepsen 1930 eutherian Didelphodus absarokae Cope 1881 eutherian
Cimolesta - Coryphodontidae	Coryphodon sp. Coryphodon sp. Owen 1845 pantodont "2"
Cimolesta - Esthonychidae	Esthonyx bisulcatus Esthonyx bisulcatus Cope 1874 tillodont
Condylarthra - Hyopsodontidae	Hyopsodus sp. Hyopsodus sp. Leidy 1870 condylarth "latidens/miticulus"
Macroscelidea - Apheliscidae	Apheliscus sp., Haplomylus speirianus Apheliscus sp. Cope 1875 elephant shrew "wapitiensis/insidiosus" Haplomylus speirianus Cope 1880 elephant shrew
Acreodi - Mesonychidae	Pachyaena ossifraga Pachyaena ossifraga Cope 1874 condylarth
Theriamorpha - Phenacodontidae	Ectocion osbornianus, Phenacodus sp.¹ Ectocion osbornianus Cope 1882 condylarth Phenacodus sp.¹ Cope 1873 condylarth
Perissodactyla - Equidae	"Hyracotherium aemulor" = Arenahippus aemulor "Hyracotherium aemulor" = Arenahippus aemulor Gingerich 1991 horse "H. sp. 2"
Procreodi - Arctocyonidae	Thryptacodon antiquus Thryptacodon antiquus Matthew and Granger 1915 condylarth
Artiodactyla - Diacodexeidae	Bunophorus robustus¹, Diacodexis sp.¹ Bunophorus robustus¹ Sinclair 1914 even-toed ungulate Diacodexis sp.¹ Cope 1882 even-toed ungulate
Theriamorpha - Viverravidae	Viverravus sp., Didymictis sp. Viverravus sp. Marsh 1872 placental "V. acutus/gracilis" Didymictis sp. Cope 1875 placental "curtidens/lysitensis"
Theriamorpha -	Vulpavus australis, Uintacyon massetericus Vulpavus australis Matthew and Granger 1915 placental Uintacyon massetericus Cope 1882 placental
Theriamorpha - Metacheiromyidae	Palaeanodon ignavus Palaeanodon ignavus Matthew 1918 placental
Creodonta - Oxyaenidae	Oxyaena sp. Oxyaena sp. Cope 1874 creodont "intermedia/forcipata"
Creodonta - Hyaenodontidae	Prototomus sp., Tritemnodon sp., Tritemnodon strenuus¹ Prototomus sp. Cope 1874 creodont "1" Tritemnodon sp. Matthew 1906 creodont "1" Tritemnodon strenuus¹ Cope 1875 creodont
Theriamorpha - Pantolestoidae	Palaeosinopa incerta³ Palaeosinopa incerta³ Bown and Schankler 1982 placental "P. sp. 1"
Rodentia - Sciuravidae	cf. Knightomys depressus, cf. Knightomys minor¹ cf. Knightomys depressus Loomis 1907 rodent cf. Knightomys minor¹ Wood 1965 rodent
Rodentia - Ischyromyidae	Paramys cf. excavatus, Paramys cf. copei Paramys cf. excavatus Loomis 1907 rodent Paramys cf. copei Loomis 1907 rodent
Dermoptera -	Plagiomene multicuspis Plagiomene multicuspis Matthew 1918 colugo
Primates - Paromomyidae	Phenacolemurinae indet.¹ Phenacolemurinae indet.¹ Simpson 1955 primate
Primates - Omomyidae	Tetonius sp.² Tetonius sp.² Matthew 1915 tarsier
Primates - Notharctidae	Cantius sp.¹ Cantius sp.¹ Simons 1962 primate
Primates - Microsyopidae	Niptomomys doreenae Niptomomys doreenae McKenna 1960 primate

¹Alroy 2002; ²Bown and Rose 1987; ³Bown and Schankler 1982