PaleoDB taxon number: 54176
Full reference: O. C. Marsh. 1888. Notice of a new genus of Sauropoda and other new dinosaurs from the Potomac Formation. American Journal of Science 35:89-94
Sister taxa: none
Type specimen: USNM 2135, a tooth. Its type locality is Muirkirk, Arundel, which is in an Aptian lacustrine claystone in the Arundel Clay Formation of Maryland.
Ecology: ground dwelling herbivore