Mouth of White River (Eocene of the United States)

Where: Uintah County, Utah (40.2° N, 109.9° W: paleocoordinates 43.0° N, 98.9° W)

• coordinate based on political unit

When: Wagonhound Member (Uinta Formation), Uintan (46.2 - 40.4 Ma)

Environment/lithology: terrestrial

Primary reference: M. R. Dawson. 1966. Additional late Eocene rodents (Mammalia) from the Uinta basin, Utah. Annals of Carnegie Museum 38(4):97-116 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 16606: authorized by John Alroy, entered by John Alroy on 21.09.1998, edited by Terri Cleary

Creative Commons license: CC BY (attribution)

Taxonomic list

• most of this material is from the Marsh/YPM collections
this material may be from anywhere in the member
may include the following: Epihippus gracilis Granger 1908: type of Marsh 1871, and type of "E. uintensis" of Marsh 1875, both from "White River, Uinta Basin"
Mammalia
 Rodentia - Sciuravidae
Sciuravus popi n. sp. Dawson 1966 rodent
Wagonhound Mbr. in "badlands east of White River Pocket"; referred specimen, "mouth of White River"; it is conceivable that these are the same locality, if unlikely; Prothero 1996a lists S. popi at White River Pocket, probably as an expedient
 Perissodactyla -
Isectolophus annectens1 Scott and Osborn 1887 odd-toed ungulate
 Artiodactyla - Oromerycidae
Oromeryx plicatus n. sp.2 Marsh 1894 even-toed ungulate
of Marsh from "Uinta B mouth of White River"
 Theriamorpha -
Uintacyon acutus n. sp.4 Thorpe 1923 placental
"mouth of White River, Utah"
 Acreodi - Mesonychidae
Mesonyx sp.4 Cope 1872 condylarth
"near the mouth of White River, Utah"
Reptilia
 Squamata -
"Saniwa crassa" = Saniwa ensidens3
"Saniwa crassa" = Saniwa ensidens3 Leidy 1870 squamates
PU 11227, poorly preserved articulated series of 6 dorsal vertebrae with numerous fragmentary parts; right ischium and portions of other pelvic bones; right femur. "upper B or lower C, Uinta Fm"; YPM 1069, poorly preserved dorsal and caudal vertebrae