Sand Butte Level 2 (Eocene of the United States)

Where: Sweetwater County, Wyoming (41.7° N, 109.0° W: paleocoordinates 46.6° N, 92.6° W)

• coordinate based on political unit

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

Environment/lithology: terrestrial

Primary reference: C. L. Gazin. 1965. Early Eocene mammalian faunas and their environment in the vicinity of the Rock Springs Uplift, Wyoming. Wyoming Geological Association Guidebook 19:171-180 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 15721: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• Graybullian
Mammalia
 Rodentia - Paramyidae
Paramyidae indet. Miller and Gidley 1918 rodent
 Rodentia - Sciuravidae
Sciuravidae indet. Miller and Gidley 1918 rodent
 Primates - Microsyopidae
"Haplomylus speirianus" = Microsyops speirianus
"Haplomylus speirianus" = Microsyops speirianus Cope 1880 primate
 Primates - Notharctidae
Cantius cf. frugivorus Cope 1875 primate
 Perissodactyla - Equidae
Equidae indet. Gray 1821 horse
 Theriamorpha - Phenacodontidae
Meniscotherium cf. tapiacitum Cope 1882 condylarth
 Theriamorpha - Viverravidae
Didymictis sp. Cope 1875 placental
 Condylarthra - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth