PBDB Collection

Elk Creek (240 m) (Eocene of the United States)

Also known as YPM 351, 354, 355, 386

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 15520: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• Y-302 is at approx. 235 m

Show authors, comments, and common names

Reptilia
Testudines - Kinosternoidea	Cardichelyon rogerwoodi³ Cardichelyon rogerwoodi³ Hutchison 2013 mud turtle from V81225 (=below Yale 386)
Mammalia
Cimolesta - Esthonychidae	Esthonyx bisulcatus Esthonyx bisulcatus Cope 1874 tillodont
Cimolesta - Coryphodontidae	Coryphodon sp. Coryphodon sp. Owen 1845 pantodont "2"
Macroscelidea - Apheliscidae	Apheliscus sp., Haplomylus speirianus Apheliscus sp. Cope 1875 elephant shrew "wapitiensis/insidiosus" Haplomylus speirianus Cope 1880 elephant shrew
Macroscelidea - Amphilemuridae	Macrocranion nitens Macrocranion nitens Matthew 1918 elephant shrew
Condylarthra - Hyopsodontidae	Hyopsodus sp. Hyopsodus sp. Leidy 1870 condylarth "latidens/miticulus"
Rodentia - Ischyromyidae	Paramys cf. excavatus, Paramys cf. copei Paramys cf. excavatus Loomis 1907 rodent Paramys cf. copei Loomis 1907 rodent
Rodentia - Sciuravidae	cf. Knightomys minor¹ cf. Knightomys minor¹ Wood 1965 rodent
Dermoptera -	Plagiomene multicuspis Plagiomene multicuspis Matthew 1918 colugo
Primates - Paromomyidae	Phenacolemurinae indet.¹, Ignacius graybullianus Phenacolemurinae indet.¹ Simpson 1955 primate Ignacius graybullianus Bown and Rose 1976 primate
Primates - Notharctidae	Cantius sp.¹ Cantius sp.¹ Simons 1962 primate
Primates - Omomyidae	Teilhardina tenuicula¹, Tetonius sp.² Teilhardina tenuicula¹ Jepsen 1930 tarsier Tetonius sp.² Matthew 1915 tarsier
Tribosphenida - Phenacodontidae	Ectocion osbornianus, Phenacodus sp.¹, Phenacodus intermedius, Phenacodus vortmani⁴ Ectocion osbornianus Cope 1882 condylarth Phenacodus sp.¹ Cope 1873 condylarth Phenacodus intermedius Granger 1915 condylarth Phenacodus vortmani⁴ Cope 1880 condylarth 244 m level
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	Diacodexis sp.¹, Bunophorus robustus¹ Diacodexis sp.¹ Cope 1882 even-toed ungulate Bunophorus robustus¹ Sinclair 1914 even-toed ungulate
Creodonta - Oxyaenidae	Oxyaena sp. Oxyaena sp. Cope 1874 creodont "intermedia/forcipata"
Creodonta - Hyaenodontidae	Tritemnodon sp., Tritemnodon strenuus¹, Prototomus sp., Arfia sp.¹ Tritemnodon sp. Matthew 1906 creodont "1" Tritemnodon strenuus¹ Cope 1875 creodont Prototomus sp. Cope 1874 creodont "1" Arfia sp.¹ Van Valen 1965 creodont
Creodonta -	Prolimnocyon atavus Prolimnocyon atavus Matthew and Granger 1915 creodont
Ferae - Viverravidae	Viverravus sp., Viverravus sp., Didymictis sp. Viverravus sp. Marsh 1872 placental "V. acutus/gracilis" Viverravus sp. Marsh 1872 placental "2" Didymictis sp. Cope 1875 placental "curtidens/lysitensis"
Ferae -	Miacis sp.¹, Uintacyon massetericus Miacis sp.¹ Cope 1872 placental Uintacyon massetericus Cope 1882 placental
Leptictida - Leptictidae	Prodiacodon tauricinerei Prodiacodon tauricinerei Jepsen 1930 eutherian

¹Alroy 2002; ²Bown and Rose 1987; ³Hutchison 2013; ⁴Thewissen 1990