Lang Springs (Eocene of the United States)

Where: Moffat County, Colorado (40.6° N, 108.1° W: paleocoordinates 44.4° N, 94.4° W)

• coordinate based on political unit

When: Washakie Formation, Bridgerian (50.3 - 46.2 Ma)

Environment/lithology: terrestrial

Primary reference: R. K. Stucky, D. R. Prothero, W. G. Lohr and J. R. Snyder. 1996. Magnetic stratigraphy, sedimentology, and mammalian faunas of the early Uintan Washakie Formation, Sand Wash Basin, northwestern Colorado. In D. R. Prothero, R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 40-51 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 16251: authorized by John Alroy, entered by John Alroy on 12.04.1997

Creative Commons license: CC BY (attribution)

Taxonomic list

• Locality 20 of West and Dawson 1975; considerably to the NE of the main Sand Wash collecting area, and based on map of Stucky et al. probably includes three localities
below Robin's Egg Blue Tuff, and therefore most likely equivalent to the very top of the Kinney Rim Mbr.
fauna is included in the table listing the general Sand Wash fauna, and where there is clear evidence I have assumed that such records pertain only to Lang Springs
no particular evidence that this is Uintan
Mammalia
 Didelphimorphia - Didelphidae
 Condylarthra - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
 Perissodactyla -
Tapiroidea indet. Gill 1872 odd-toed ungulate
"tapir"
 Perissodactyla - Equidae
Orohippus sylvaticus2 Leidy 1870 horse
not clear why this is omitted by Stucky et al.
 Theriamorpha - Viverravidae
Viverravus sp.2 Marsh 1872 placental
not clear why this is omitted by Stucky et al.
 Rodentia - Sciuravidae
Tillomys cf. senex2 Marsh 1872 rodent
not clear why this is omitted by Stucky et al.
 Primates - Microsyopidae
Microsyops sp. Leidy 1872 primate
 Primates - Omomyidae
Hemiacodon sp.1 Marsh 1872 tarsier
 Dinocerata - Uintatheriidae
Uintatheriidae indet. Flower 1876 uintathere
"uintathere"