Quinn Draw (Lower Titanotherium Beds) (Eocene of the United States)

Where: Shannon County, South Dakota (43.3° N, 102.5° W: paleocoordinates 44.6° N, 93.7° W)

• coordinate based on political unit

When: Chadron Formation, Chadronian (37.2 - 33.9 Ma)

• member-level stratigraphic resolution

Environment/lithology: terrestrial

Primary reference: H. F. Osborn. 1902. The four phyla of Oligocene titanotheres. Bulletin of the American Museum of Natural History 16(8):91-109 [J. Alroy/J. Alroy/T. Liebrecht]more details

PaleoDB collection 17012: authorized by John Alroy, entered by John Alroy on 18.10.1995

Creative Commons license: CC BY (attribution)

Taxonomic list

• relationship of unit to members of Clark and Beerbower 1967 unclear
Reptilia
 Testudines - Kinosternoidea
Xenochelys formosa n. sp.2 Hay 1906 mud turtle
"Quinn Draw... lower Titanotherium beds": collected by Albert Thomson in 1904
Mammalia
 Perissodactyla - Brontotheriidae
Brontops dispar3 Marsh 1887 brontothere
middle beds, Quinn Draw
Brontops brachycephalus1 Osborn 1902 brontothere
 Perissodactyla - Amynodontidae
Metamynodon chadronensis n. sp.4 Wood 1937 odd-toed ungulate
from "Lower Titanotherium Beds of Quin Draw, 4 miles from the Cheyenne River, Big Badlands" DUPLICATE REF 3725 or 3745
 Perissodactyla - Rhinocerotidae
Trigonias osborni1 Lucas 1900 rhinoceros