Full reference: E. D. Cope. 1877. On a dinosaurian from the Trias of Utah. Proceedings of the American Philosophical Society 16:579-584
Sister taxa: none
Type specimen: USNM 2364, a partial skeleton (humerus, three metarsals, distal end of ulna, probable sternum, and fragments). Its type locality is East Canyon Quarry, which is in an Oxfordian crevasse splay sandstone in the Morrison Formation of Utah.
Ecology: ground dwelling herbivore
Average measurements (in mm): ? ulna diameter 150.0, humerus 765.0 x 78.0, scapula length 680.0