PBDB

Elk Creek (590 m) (Eocene of the United States)

Also known as YPM 20, 23, 171, 173, 177, 186, 314, USGS D-1436 (585 m), 1175, 1573

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 15555: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• possibly relevant: Dissacus serior O'Leary and Rose 1995a: type, USGS D-1754, "511-m level"
YPM 314 and USGS 1573 are in Washakie County

Show authors, comments, and common names

Mammalia
Condylarthra - Hyopsodontidae	Hyopsodus sp., Hyopsodus powellianus Hyopsodus sp. Leidy 1870 condylarth "latidens/miticulus" Hyopsodus powellianus Cope 1884 condylarth
Macroscelidea - Amphilemuridae	Macrocranion nitens Macrocranion nitens Matthew 1918 elephant shrew
Primates - Notharctidae	Cantius abditus¹, Cantius nunienus¹ Cantius abditus¹ Gingerich and Simons 1977 primate Cantius nunienus¹ Cope 1881 primate
Primates - Paromomyidae	Phenacolemurinae indet. Phenacolemurinae indet. Simpson 1955 primate "Phenacolemur sp. 1" and "P. sp. 2"
Primates - Omomyidae	Absarokius metoecus², Absarokius abbotti Absarokius metoecus² Bown and Rose 1987 tarsier Y-314, USGS D-1573 Absarokius abbotti Loomis 1906 tarsier OK, B & R 87: Y-314, USGS D-1175, 1436, 1573
Rodentia - Ischyromyidae	Paramys cf. excavatus, Paramys cf. copei Paramys cf. excavatus Loomis 1907 rodent Paramys cf. copei Loomis 1907 rodent
Procreodi - Arctocyonidae	Thryptacodon antiquus, Anacodon ursidens Thryptacodon antiquus Matthew and Granger 1915 condylarth Anacodon ursidens Cope 1882 condylarth
Perissodactyla - Equidae	"Hyracotherium grangeri" = Sifrhippus grangeri, "Hyracotherium cf. index" = Minippus index "Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse "H. sp. 1" "Hyracotherium cf. index" = Minippus index Cope 1873 horse
Perissodactyla -	Heptodon posticus, Heptodon calciculus Heptodon posticus Cope 1882 odd-toed ungulate Heptodon calciculus Cope 1880 odd-toed ungulate
Theriamorpha - Phenacodontidae	Phenacodus sp.¹, Phenacodus vortmani Phenacodus sp.¹ Cope 1873 condylarth Phenacodus vortmani Cope 1880 condylarth
Artiodactyla - Diacodexeidae	Diacodexis sp.¹, Bunophorus sp.¹ Diacodexis sp.¹ Cope 1882 even-toed ungulate Bunophorus sp.¹ Sinclair 1914 even-toed ungulate
Creodonta - Oxyaenidae	Oxyaena sp. Oxyaena sp. Cope 1874 creodont "intermedia/forcipata"
Creodonta - Hyaenodontidae	Prototomus sp. Prototomus sp. Cope 1874 creodont "1"
Theriamorpha - Viverravidae	Didymictis sp., Viverravus sp. Didymictis sp. Cope 1875 placental "curtidens/lysitensis" Viverravus sp. Marsh 1872 placental "V. acutus/gracilis"
Theriamorpha -	Miacis sp.¹, Vulpavus australis, Vulpavus canavus, Uintacyon asodes Miacis sp.¹ Cope 1872 placental Vulpavus australis Matthew and Granger 1915 placental Vulpavus canavus Cope 1881 placental Uintacyon asodes Gazin 1952 placental
Cimolesta - Pantolestidae	Palaeosinopa veterrima Palaeosinopa veterrima Matthew 1901 eutherian
Cimolesta - Esthonychidae	Esthonyx bisulcatus Esthonyx bisulcatus Cope 1874 tillodont
Theriamorpha - Leptictidae	Prodiacodon tauricinerei Prodiacodon tauricinerei Jepsen 1930 eutherian

¹Alroy 2002; ²Bown and Rose 1987