Trachodon is a species of dinosaur that lived on on the Outer Crust and it lives in Pellucidar, they are hadrosaurs which were one of the most common groups of dinosaurs that roamed the Outer Crust during the Late Cretaceous, they are roughly the size of an elephant and are gentle herbivores.
They live in the Phelian Swamp in herds, they are preyed upon by both Giant Snakes and the Horibs, presumaly the Zarith and the Tarag prey on them as well their Native Pellucidarian name is unknown.