Aublysodon Dinosaur Teeth

Aublysodon (uncertain derivation; perhaps "backwards-flowing tooth"?) is a carnivorous dinosaur taxon named by Joseph Leidy in 1868. It is a dubious name, since the type specimen consists only of an isolated premaxillary tooth, found in strata from the Late Cretaceous Period. This specimen is now lost. Identical teeth have been found in many US states, western Canada, and Asia.  These teeth almost certainly belong to a juvenile tyrannosaurine tyrannosaurid, but cannot be identified with any more specificity.