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 (the Pellucidar name for Tyrannosaurus Rex) and the Tarag ( the Pellucidar name for Saber Tooth Tiger) prey on them as well their Native Pellucidarian name is unknown.