Species
Extinct

Trachodon longiceps

subjective synonym of Edmontosaurus annectens
(Marsh 1890)
This taxon is considered subjective synonym of of the valid taxon Edmontosaurus annectens according to the Paleobiology Database. See the page for Edmontosaurus annectens →
Bibliography
Original description
O. C. Marsh. 1890. Additional characters of the Ceratopsidae, with notice of new Cretaceous dinosaurs. American Journal of Science 39:418-426 DOI ↗