Full reference: G. G. Simpson. 1941. A giant rodent from the Oligocene. Science 93:474-475
Sister taxa: none
Type specimen: Amer. Mus. No. 39081, a partial skeleton (fairly complete skull and jaws, most of a fore limb and other fragments). Its type locality is Manitsha Site, which is in an Orellan terrestrial horizon in South Dakota.
Ecology: ground dwelling herbivore
Distribution: found only at Manitsha Site
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.