ammonites
Poebrotherium chadronense Prothero 1996 (even-toed ungulate)

Mammalia - Artiodactyla

Full reference: D. R. Prothero. 1996. Camelidae. The Terrestrial Eocene-Oligocene Transition in North America 609-651

Belongs to Poebrotherium according to D. R. Prothero 1996

Sister taxa: Poebrotherium eximium, Poebrotherium franki, Poebrotherium wilsoni

Type specimen: Its type locality is Airstrip (TMM 40504), which is in a Chadronian terrestrial horizon in the Capote Mountain Tuff Formation of Texas

Ecology: ground dwelling grazer-browser

Average measurements (in mm): M1 10.2 x 10.9, M2 12.7 x 12.6, M3 13.3 x 13.4