Oak Creek (Miocene of the United States)

Where: Todd County, South Dakota (43.2° N, 100.7° W: paleocoordinates 43.7° N, 97.6° W)

• coordinate based on political unit

When: Miocene (23.0 - 5.3 Ma)

Environment/lithology: terrestrial

Primary reference: E. L. Troxell. 1916. An early Pliocene one-toed horse, Pliohippus lullianus sp. nov. American Journal of Science 42(250):335-348 [J. Alroy/J. Alroy/J. Ju]more details

PaleoDB collection 18297: authorized by John Alroy, entered by John Alroy on 26.03.1995

Creative Commons license: CC BY (attribution)

Taxonomic list

• probably the modern town of Okreek, which is 16 mi E of Mission and also in Todd County
not discussed by Macdonald 1960 or Green 1971 and in any event a different collection; treated as a separate locality by Tabrum 1981
a merycodont is reported from "an eight of a mile away and about seventy-five feet lower"

specimen resembling "Protohippus placidus" found "Three miles from the main quarry"
Mammalia
 Perissodactyla - Rhinocerotidae
Teleoceras sp. Hatcher 1894 rhinoceros
 Perissodactyla - Equidae
Hipparionini indet. Quinn 1955 hipparionine horse
compared to "Hipparion"
Equini indet. Quinn 1955 horse
compared to "Protohippus"
Pliohippus pernix Marsh 1874 horse
 Proboscidea - Proboscidea
Proboscidea indet. proboscidean
 Artiodactyla - Camelidae
Camelidae indet. Gray 1821 camel