This taxon is considered subjective synonym of
of the valid taxon Edmontosaurus
according to the Paleobiology Database.
See the page for Edmontosaurus →
Bibliography
Original description
R. Chapman and M. K. Brett-Surman. 1990. Morphometric observations on hadrosaurid ornithopods. In K. Carpenter and P. J. Currie (eds.), Dinosaur Systematics: Perspectives and Approaches, Cambridge University Press, Cambridge
DOI ↗