West of Elk Mountain (Eocene of the United States)

Where: Lincoln County, Wyoming (41.8° N, 110.7° W: paleocoordinates 46.9° N, 94.4° W)

• coordinate based on political unit

When: Main Body Member (Wasatch Formation), Wasatchian (55.8 - 50.3 Ma)

Environment/lithology: terrestrial

Primary reference: C. L. Gazin. 1962. A Further Study Of The Lower Eocene Mammalian Faunas Of Southwestern Wyoming. Smithsonian Miscellaneous Collections 144(1):1-98 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 15889: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• low in the local section and shown as beneath Fossil Butte in a figure
multiple localities along four miles of strike; southernmost is in sec 30 T 20N R 119W
Mammalia
 Primates - Notharctidae
Cantius cf. frugivorus1 Cope 1875 primate
 Cimolesta - Coryphodontidae
Coryphodon radians Cope 1872 pantodont
said to be "C. anthracoideus" by Lucas 1998b
Coryphodon armatus3 Cope 1872 pantodont
 Rodentia - Ischyromyidae
Paramys excavatus Loomis 1907 rodent
 Perissodactyla - Palaeotheriidae
Hyracotherium sp.1 Owen 1841 odd-toed ungulate
 Ferae - Viverravidae
Didymictis sp.1 Cope 1875 placental
 Ferae -
Vassacyon cf. promicrodon Wortman and Matthew 1899 placental
 Macroscelidea - Apheliscidae
Haplomylus speirianus Cope 1880 elephant shrew
 Trogontia - Esthonychidae
Esthonyx spatularius2 Cope 1880 tillodont
 Ungulata - Hyopsodontidae
Hyopsodus sp.1 Leidy 1870 condylarth
 Ungulata - Diacodexeidae
Diacodexis sp.1 Cope 1882 even-toed ungulate
 Ungulata - Phenacodontidae
Meniscotherium chamense4 Cope 1874 condylarth
Phenacodus cf. vortmani Cope 1880 condylarth
 Acreodi - Mesonychidae
Pachyaena gracilis Matthew and Granger 1915 condylarth
 Hyaenodonta - Hyaenodontidae
Prototomus cf. secundarius1 Cope 1875 eutherian
Tritemnodon cf. strenuus1 Cope 1875 eutherian