Species
Extinct

Thespesius occidentalis

nomen dubium, species not entered Hadrosauridae
(Leidy 1856)
This taxon is considered nomen dubium, species not entered of the valid taxon Hadrosauridae according to the Paleobiology Database. See the page for Hadrosauridae →
Bibliography
Original description
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