PBDB Collection

Elk Creek (600 m) (Eocene of the United States)

Also known as YPM 18b, 19, 36, USGS D-1625 (595 m)

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 15556: 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
Theriamorpha - Leptictidae	Palaeictops bicuspis Palaeictops bicuspis Cope 1880 eutherian
Theriamorpha - Stylinodontidae	Ectoganus gliriformis¹ Ectoganus gliriformis¹ Cope 1874 taeniodont
Cimolesta - Coryphodontidae	Coryphodon sp. Coryphodon sp. Owen 1845 pantodont "2"
Cimolesta - Esthonychidae	Esthonyx bisulcatus Esthonyx bisulcatus Cope 1874 tillodont
Condylarthra - Hyopsodontidae	Hyopsodus sp., Hyopsodus sp., Hyopsodus powellianus Hyopsodus sp. Leidy 1870 condylarth "latidens/miticulus" Hyopsodus sp. Leidy 1870 condylarth "loomisi/minor" Hyopsodus powellianus Cope 1884 condylarth
Acreodi - Hapalodectidae	Hapalodectes leptognathus Hapalodectes leptognathus Osborn and Wortman 1892 condylarth
Creodonta - Hyaenodontidae	Tritemnodon strenuus¹, Prototomus sp. Tritemnodon strenuus¹ Cope 1875 creodont Prototomus sp. Cope 1874 creodont "1"
Creodonta - Oxyaenidae	Oxyaena sp. Oxyaena sp. Cope 1874 creodont "intermedia/forcipata"
Theriamorpha -	Miacis sp.¹, Vulpavus australis, Uintacyon asodes Miacis sp.¹ Cope 1872 placental Vulpavus australis Matthew and Granger 1915 placental Uintacyon asodes Gazin 1952 placental
Theriamorpha - Viverravidae	Viverravus sp., Didymictis sp. Viverravus sp. Marsh 1872 placental "V. acutus/gracilis" Didymictis sp. Cope 1875 placental "curtidens/lysitensis"
Perissodactyla - Equidae	"Hyracotherium pernix" = Arenahippus pernix, "Hyracotherium grangeri" = Sifrhippus grangeri, "Hyracotherium cf. index" = Minippus index "Hyracotherium pernix" = Arenahippus pernix Marsh 1876 horse "H. sp. 3" "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	Bunophorus sp.¹, Diacodexis sp.¹ Bunophorus sp.¹ Sinclair 1914 even-toed ungulate Diacodexis sp.¹ Cope 1882 even-toed ungulate
Theriamorpha - Pantolestoidae	Palaeosinopa veterrima Palaeosinopa veterrima Matthew 1901 placental
Rodentia - Ischyromyidae	Paramys cf. excavatus, Paramys cf. copei, cf. Mytonomys coloradensis¹ Paramys cf. excavatus Loomis 1907 rodent Paramys cf. copei Loomis 1907 rodent cf. Mytonomys coloradensis¹ Wood 1962 rodent
Primates - Notharctidae	Cantius abditus¹ Cantius abditus¹ Gingerich and Simons 1977 primate
Primates - Omomyidae	Absarokius abbotti, Absarokius metoecus² Absarokius abbotti Loomis 1906 tarsier OK, B & R 87: Y-18, USGS D-1625 Absarokius metoecus² Bown and Rose 1987 tarsier Y-18b
Primates - Microsyopidae	Microsyopidae indet.¹ Microsyopidae indet.¹ Osborn and Wortman 1892 primate
Primates - Paromomyidae	Phenacolemurinae indet. Phenacolemurinae indet. Simpson 1955 primate "Phenacolemur sp. 2"

¹Alroy 2002; ²Bown and Rose 1987