Trachodon is a species of animal that lived on the surface world and the inner world of Pellucidar. they are one of the animals that lived in the Cretaceous and they lived Pellucidar.
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.