Only those originally named as a species of "Trachodon" are considered here. Marsh named this partial jaw "Trachodon longiceps". One species was named "Trachodon mirabilis". Barnum Brown initially identified the mummy as "Trachodon annectens". Another, a model of a Trachodon, has been displayed at Brookfield Zoo outside Chicago, Illinois. At the time, the genus "Trachodon" encompassed nearly all known hadrosaurid specimens. The type species of "Trachodon" is "T. mirabilis". An "Allosaurus" attacks a "Trachodon", and knocks it into a bog. With the Senckenberg mummy, another "Trachodon" specimen with supposed webbing was discovered in 1910. As a hadrosaurid, "Trachodon" would have been a large, bipedal/quadrupedal herbivore. "Trachodon" was based on ANSP 9260, seven unassociated teeth, one of which had double roots.