PBDB Collection

Elk Creek (460 m) (Eocene of the United States)

Also known as YPM 85, 320, 321

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 15543: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Mammalia
Condylarthra - Hyopsodontidae	Hyopsodus sp., Hyopsodus sp. Hyopsodus sp. Leidy 1870 condylarth "latidens/miticulus" Hyopsodus sp. Leidy 1870 condylarth "loomisi/minor"
Theriamorpha - Viverravidae	Viverravus sp., Didymictis protenus³ Viverravus sp. Marsh 1872 placental "V. acutus/gracilis" Didymictis protenus³ Cope 1874 placental YM-320; "D. curtidens/lysitensis"
Theriamorpha -	Vulpavus australis Vulpavus australis Matthew and Granger 1915 placental
Creodonta - Hyaenodontidae	Prototomus robustus² Prototomus robustus² Matthew and Granger 1915 creodont "P. sp. 1" at YM 320
Artiodactyla - Diacodexeidae	Diacodexis sp.¹, Bunophorus sp.¹, Bunophorus robustus¹ Diacodexis sp.¹ Cope 1882 even-toed ungulate Bunophorus sp.¹ Sinclair 1914 even-toed ungulate Bunophorus robustus¹ Sinclair 1914 even-toed ungulate
Theriamorpha - Phenacodontidae	Copecion brachypternus¹, Phenacodus vortmani Copecion brachypternus¹ Cope 1882 condylarth Phenacodus vortmani Cope 1880 condylarth
Perissodactyla - Equidae	"Hyracotherium grangeri" = Sifrhippus grangeri "Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse "H. sp. 1"
Rodentia - Ischyromyidae	Paramys cf. copei, Paramys cf. excavatus Paramys cf. copei Loomis 1907 rodent Paramys cf. excavatus Loomis 1907 rodent
Primates - Notharctidae	Cantius abditus¹ Cantius abditus¹ Gingerich and Simons 1977 primate
Primates - Microsyopidae	Microsyopidae indet.¹ Microsyopidae indet.¹ Osborn and Wortman 1892 primate
Cimolesta - Esthonychidae	Esthonyx bisulcatus Esthonyx bisulcatus Cope 1874 tillodont
Cimolesta - Coryphodontidae	Coryphodon sp. Coryphodon sp. Owen 1845 pantodont "2"

¹Alroy 2002; ²Gingerich and Deutsch 1989; ³Polly 1997