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Thespesius occidentalis Leidy 1856 (hadrosaurid)

Reptilia - Neornithischia - Hadrosauridae

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

Belongs to Thespesius according to J. R. Horner et al. 2004

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