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
 Ferae -
Vulpavus australis
Vulpavus australis Matthew and Granger 1915 placental
 Ferae - Viverravidae
Didymictis protenus3, Viverravus sp.
Didymictis protenus3 Cope 1874 placental
YM-320; "D. curtidens/lysitensis"
Viverravus sp. Marsh 1872 placental
"V. acutus/gracilis"
 Creodonta - Hyaenodontidae
Prototomus robustus2
Prototomus robustus2 Matthew and Granger 1915 creodont
"P. sp. 1" at YM 320
 Artiodactyla - Diacodexeidae
Bunophorus sp.1, Bunophorus robustus1, Diacodexis sp.1
Bunophorus sp.1 Sinclair 1914 even-toed ungulate
Bunophorus robustus1 Sinclair 1914 even-toed ungulate
Diacodexis sp.1 Cope 1882 even-toed ungulate
 Tribosphenida - 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"
 Primates - Microsyopidae
Microsyopidae indet.1
Microsyopidae indet.1 Osborn and Wortman 1892 primate
 Primates - Notharctidae
Cantius abditus1
Cantius abditus1 Gingerich and Simons 1977 primate
 Rodentia - Ischyromyidae
Paramys cf. excavatus, Paramys cf. copei
Paramys cf. excavatus Loomis 1907 rodent
Paramys cf. copei Loomis 1907 rodent
 Condylarthra - Hyopsodontidae
Hyopsodus sp., Hyopsodus sp.
Hyopsodus sp. Leidy 1870 condylarth
"latidens/miticulus"
Hyopsodus sp. Leidy 1870 condylarth
"loomisi/minor"
 Cimolesta - Coryphodontidae
Coryphodon sp.
Coryphodon sp. Owen 1845 pantodont
"2"
 Cimolesta - Esthonychidae
Esthonyx bisulcatus
Esthonyx bisulcatus Cope 1874 tillodont
1Alroy 2002; 2Gingerich and Deutsch 1989; 3Polly 1997