Fossil Butte (Upper) (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: 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 15597: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• said to be in the "Knight Fm." and "close below the Green River shales" (i.e., Fossil Butte Mbr.)
apparently same as Fossil Butte NM west of Kemmerer; see Grande 1984
Mammalia
 Primates - Notharctidae
Copelemur australotutus n. sp.2 Beard 1988 primate
single "Pelycodus nr. jarrovii" specimen from "the north side (saddle) of Fossil Butte"; the only other specimen from the north side explicitly mentioned by Gazin is Meniscotherium sp., from the upper levels
 Rodentia - Reithroparamyidae
Reithroparamys sp. Matthew 1920 rodent
apparently the specimen from "Lysite equivalent, saddle north of Fossil Butte" that is "questionably referred" to R. debequensis by Wood 1962
 Perissodactyla -
Heptodon sp. Cope 1882 odd-toed ungulate
 Perissodactyla - Equidae
Equidae indet.1 Gray 1821 horse
 Ferae - Viverravidae
Didymictis altidens Cope 1880 placental
 Carnivora -
Vulpavus australis3 Matthew and Granger 1915 carnivoran
 Taeniodonta - Stylinodontidae
Ectoganus sp. Cope 1874 taeniodont
 Ungulata - Hyopsodontidae
Hyopsodus sp.1 Leidy 1870 condylarth
Hyopsodus powellianus1 Cope 1884 condylarth
 Ungulata - Homacodontidae
Hexacodus uintensis Gazin 1952 even-toed ungulate
 Ungulata - Phenacodontidae
Meniscotherium chamense4 Cope 1874 condylarth
 Hyaenodonta - Hyaenodontidae
Prototomus cf. secundarius1 Cope 1875 eutherian