West of Rock Springs Level 4 (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: Luman Tongue Member (Wasatch Formation), Wasatchian (55.8 - 50.3 Ma)

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

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

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 15894: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• Lysitean?
Show authors, comments, and common names
Mammalia
 Placentalia -
Condylarthra indet.
Condylarthra indet. Cope 1881 placental
said to be a "small form... new condylarth"
 Condylarthra - Hyopsodontidae
Hyopsodus cf. powellianus, Hyopsodus cf. mentalis
Hyopsodus cf. powellianus Cope 1884 condylarth
Hyopsodus cf. mentalis Cope 1875 condylarth
 Perissodactyla - Equidae
Equidae indet.
Equidae indet. Gray 1821 horse
 Placentalia -
Rodentia indet.
Rodentia indet. Bowdich 1821 rodent
 Primates - Microsyopidae
Microsyops sp.
Microsyops sp. Leidy 1872 primate