PBDB Collection

Elk Creek (670 m) (Eocene of the United States)

Also known as YPM 8, 160, 162, 196, 197, 199

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 15565: 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
Cimolesta - Esthonychidae	Megalesthonyx hopsoni, Esthonyx bisulcatus Megalesthonyx hopsoni Rose 1971 tillodont Esthonyx bisulcatus Cope 1874 tillodont
Condylarthra - Hyopsodontidae	Hyopsodus sp., Hyopsodus powellianus Hyopsodus sp. Leidy 1870 condylarth "latidens/miticulus" Hyopsodus powellianus Cope 1884 condylarth
Creodonta - Oxyaenidae	Oxyaena sp. Oxyaena sp. Cope 1874 creodont "intermedia/forcipata"
Theriamorpha -	Vulpavus canavus, Uintacyon asodes Vulpavus canavus Cope 1881 placental Uintacyon asodes Gazin 1952 placental
Theriamorpha - Viverravidae	Viverravus sp. Viverravus sp. Marsh 1872 placental "V. acutus/gracilis"
Perissodactyla - Brontotheriidae	Lambdotherium popoagicum¹, Eotitanops sp.³ Lambdotherium popoagicum¹ Cope 1880 brontothere Eotitanops sp.³ Osborn 1907 brontothere YPM 8, 591 m
Perissodactyla -	Heptodon calciculus Heptodon calciculus Cope 1880 odd-toed ungulate
Artiodactyla - Homacodontidae	Antiacodon sp.⁴ Antiacodon sp.⁴ Marsh 1872 even-toed ungulate
Artiodactyla - Diacodexeidae	Diacodexis sp.¹, Diacodexis secans Diacodexis sp.¹ Cope 1882 even-toed ungulate Diacodexis secans Cope 1881 even-toed ungulate probably correct, see Krishtalka and Stucky 1985
Primates - Notharctidae	Cantius frugivorus¹ Cantius frugivorus¹ Cope 1875 primate
Primates - Omomyidae	Absarokius abbotti, Absarokius metoecus² Absarokius abbotti Loomis 1906 tarsier OK, B & R 87: Y-162 Absarokius metoecus² Bown and Rose 1987 tarsier Y-160
Primates - Microsyopidae	Microsyopidae indet.¹ Microsyopidae indet.¹ Osborn and Wortman 1892 primate

¹Alroy 2002; ²Bown and Rose 1987; ³Gunnell and Yarborough 2000; ⁴Stucky 1984