PaleoDB taxon number: 53381
Alternative combination: Hadrosaurus occidentalis
Full reference: J. Leidy. 1856. Notices of Extinct Vertebrata Discovered by Dr. F. V. Hayden, during the Expedition to the Sioux Country under the Command of Lieut. G. K. Warren. Proceedings of the Academy of Natural Sciences of Philadelphia 8:311-312
Sister taxa: none
Type specimen: USNM 219-221. Its type locality is between Moreau and Grand Rivers (USGS), which is in a Maastrichtian terrestrial horizon in the Lance Formation of South Dakota.
Ecology: ground dwelling herbivore