PBDB Collection

Elk Creek (680 m) (Eocene of the United States)

Also known as YPM 3, 31, 33 (= UCMP V96073), 163, 166, 195, 198

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

Reposited in the UCMP

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 15566: 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 - Coryphodontidae	Coryphodon sp. Coryphodon sp. Owen 1845 pantodont "2"
Cimolesta - Esthonychidae	Megalesthonyx hopsoni, Esthonyx bisulcatus, Esthonyx acutidens Megalesthonyx hopsoni Rose 1971 tillodont described by Rose 1972 from YPM 33 Esthonyx bisulcatus Cope 1874 tillodont Esthonyx acutidens Cope 1881 tillodont
Theriamorpha - Phenacodontidae	Phenacodus intermedius, Phenacodus vortmani Phenacodus intermedius Granger 1915 condylarth confirmed by Thewissen 1990 Phenacodus vortmani Cope 1880 condylarth
Perissodactyla -	Heptodon posticus Heptodon posticus Cope 1882 odd-toed ungulate
Perissodactyla - Brontotheriidae	Lambdotherium popoagicum¹ Lambdotherium popoagicum¹ Cope 1880 brontothere
Perissodactyla - Equidae	"Hyracotherium grangeri" = Sifrhippus grangeri "Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse "H. sp. 1"
Artiodactyla - Diacodexeidae	Diacodexis sp.¹, Diacodexis secans, "Bunophorus" macropternus Diacodexis sp.¹ Cope 1882 even-toed ungulate Diacodexis secans Cope 1881 even-toed ungulate probably OK "Bunophorus" macropternus Cope 1882 even-toed ungulate
Artiodactyla - Homacodontidae	Antiacodon sp.⁴ Antiacodon sp.⁴ Marsh 1872 even-toed ungulate
Acreodi - Hapalodectidae	Hapalodectes leptognathus Hapalodectes leptognathus Osborn and Wortman 1892 condylarth
Theriamorpha - Viverravidae	Didymictis sp., Viverravus sp. Didymictis sp. Cope 1875 placental "curtidens/lysitensis" Viverravus sp. Marsh 1872 placental "V. acutus/gracilis"
Theriamorpha -	Vulpavus canavus Vulpavus canavus Cope 1881 placental
Creodonta - Hyaenodontidae	Prototomus sp. Prototomus sp. Cope 1874 creodont "1"
Rodentia - Sciuravidae	cf. Knightomys depressus cf. Knightomys depressus Loomis 1907 rodent
Rodentia - Ischyromyidae	Paramys cf. copei Paramys cf. copei Loomis 1907 rodent
Primates - Microsyopidae	Microsyopidae indet.¹ Microsyopidae indet.¹ Osborn and Wortman 1892 primate
Primates - Omomyidae	Absarokius abbotti, Absarokius metoecus² Absarokius abbotti Loomis 1906 tarsier OK, B & R 87: Y-3, 31, 195 Absarokius metoecus² Bown and Rose 1987 tarsier Y-3
Primates - Notharctidae	Cantius sp.¹ Cantius sp.¹ Simons 1962 primate
Condylarthra - Hyopsodontidae	Hyopsodus sp., Hyopsodus powellianus Hyopsodus sp. Leidy 1870 condylarth "latidens/miticulus" Hyopsodus powellianus Cope 1884 condylarth
Reptilia
Testudines - Kinosternoidea	Baptemys sp.³ Baptemys sp.³ Leidy 1870 mud turtle UCMP V96073
Testudines - Geoemydidae	Echmatemys sp.³ Echmatemys sp.³ Hay 1906 turtle UCMP V96073

¹Alroy 2002; ²Bown and Rose 1987; ³Holroyd et al. 2001; ⁴Stucky 1984