PBDB Collection

Elk Creek (370 m) (Eocene of the United States)

Also known as YPM 82a, 277, 280, 282, 283, 298, 299, 419, 142, 334, 360, USGS D-1422, D-1635

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 15532: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• USGS D-1422 is from Washakie County

Show authors, comments, and common names

Reptilia
Testudines -	Planetochelys dithyros⁴ Planetochelys dithyros⁴ Hutchison 2013 turtle at UCMP V80012 (=Yale 280)
Mammalia
Cimolesta - Coryphodontidae	Coryphodon sp. Coryphodon sp. Owen 1845 pantodont "2"
Cimolesta - Esthonychidae	Esthonyx bisulcatus Esthonyx bisulcatus Cope 1874 tillodont
Macroscelidea - Apheliscidae	Apheliscus sp., Haplomylus scottianus³ Apheliscus sp. Cope 1875 elephant shrew "wapitiensis/insidiosus" Haplomylus scottianus³ Gingerich 1994 elephant shrew YM-319; presumably includes "H. speirianus"
Condylarthra - Hyopsodontidae	Hyopsodus sp. Hyopsodus sp. Leidy 1870 condylarth "latidens/miticulus"
Acreodi - Mesonychidae	Pachyaena ossifraga Pachyaena ossifraga Cope 1874 condylarth
Creodonta - Hyaenodontidae	Tritemnodon sp., Tritemnodon strenuus¹, Prototomus sp. Tritemnodon sp. Matthew 1906 creodont "1" Tritemnodon strenuus¹ Cope 1875 creodont Prototomus sp. Cope 1874 creodont "1"
Creodonta -	Prolimnocyon atavus Prolimnocyon atavus Matthew and Granger 1915 creodont at USGS D-1422: Gebo and Rose 1993
Creodonta - Oxyaenidae	Oxyaena sp. Oxyaena sp. Cope 1874 creodont "intermedia/forcipata"
Theriamorpha -	Vulpavus australis Vulpavus australis Matthew and Granger 1915 placental
Theriamorpha - Viverravidae	Didymictis sp. Didymictis sp. Cope 1875 placental "curtidens/lysitensis"
Perissodactyla - Equidae	"Hyracotherium aemulor" = Arenahippus aemulor, "Hyracotherium grangeri" = Sifrhippus grangeri "Hyracotherium aemulor" = Arenahippus aemulor Gingerich 1991 horse "H. sp. 2" "Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse "H. sp. 1"
Theriamorpha - Phenacodontidae	Ectocion osbornianus, Phenacodus sp.¹ Ectocion osbornianus Cope 1882 condylarth Phenacodus sp.¹ Cope 1873 condylarth
Artiodactyla - Diacodexeidae	Bunophorus sp.¹, Diacodexis sp.¹ Bunophorus sp.¹ Sinclair 1914 even-toed ungulate Diacodexis sp.¹ Cope 1882 even-toed ungulate
Procreodi - Arctocyonidae	Thryptacodon antiquus Thryptacodon antiquus Matthew and Granger 1915 condylarth
Theriamorpha - Pantolestoidae	Palaeosinopa veterrima Palaeosinopa veterrima Matthew 1901 placental
Rodentia - Sciuravidae	cf. Knightomys minor¹, cf. Knightomys depressus cf. Knightomys minor¹ Wood 1965 rodent cf. Knightomys depressus Loomis 1907 rodent
Rodentia - Ischyromyidae	Paramys cf. excavatus, Paramys cf. copei Paramys cf. excavatus Loomis 1907 rodent Paramys cf. copei Loomis 1907 rodent
Primates - Notharctidae	Cantius sp.¹ Cantius sp.¹ Simons 1962 primate
Primates - Omomyidae	Pseudotetonius ambiguus² Pseudotetonius ambiguus² Matthew 1915 tarsier
Primates - Microsyopidae	Microsyopidae indet.¹ Microsyopidae indet.¹ Osborn and Wortman 1892 primate
Primates - Paromomyidae	Phenacolemurinae indet.¹ Phenacolemurinae indet.¹ Simpson 1955 primate
Dermoptera -	Plagiomene multicuspis Plagiomene multicuspis Matthew 1918 colugo

¹Alroy 2002; ²Bown and Rose 1987; ³Gingerich 1994; ⁴Hutchison 2013