"Trachodon" was based on ANSP 9260, seven unassociated teeth, one of which had double roots. With better remains from "Hadrosaurus", he began to reconsider his taxonomy, and suggested, at least informally, that "Trachodon" should refer to the double-rooted tooth, and the other teeth should be referred to "Hadrosaurus". In the Bone Wars that followed, and their wake, the taxonomy of "Trachodon" and its relatives became increasingly confusing, with one author going so far as to sink all known hadrosaur species into "Trachodon" except for "Claosaurus agilis", but as new material was described from the Rocky Mountain region, Alberta, and Saskatchewan, later authors began progressively restricting the reach of this genus.