Reptilia - Dinosauria - Diplodocidae

Full reference: O. C. Marsh. 1884. Principal characters of American Jurassic dinosaurs. Part VII. Diplodocidae, a new family of the Sauropoda. American Journal of Science 27:161-167

Belongs to Diplodocus according to P. Upchurch et al. 2004

Sister taxa: Diplodocus carnegii, Diplodocus hallorum, Diplodocus hayi, Diplodocus longus

Type specimen: YPM 1922, a mandible. Its type locality is Lakes Quarry 5, Morrison (YPM), which is in a Kimmeridgian/Tithonian channel sandstone in the Morrison Formation of Colorado.

Ecology: ground dwelling herbivore