Feeding Worn 1.51" Tyrannosaur Tooth - Montana

This is a 1.51" Tyrannosaur tooth from the Two Medicine Formation (Judith River Group) of Montana. This formation is approximately 70 million years old, or about 5 million years old than the Hell Creek Formation which produces T-Rex.

This actually would have been a much larger tooth but the tip is totally worn down from rubbing against another tooth in the mouth and feeding activities. Some very interesting wear facets. One repaired crack in the base of the tooth. Serrations are still visible.

There are three described Tyrannosaurs from the Two Medicine Formation (Judith River Group), Albertosaurus, Gorgosaurus and Daspletosaurus. Research done on teeth from these three Tyrannosaurs has concluded that isolated teeth are statistically impossible to assign to a specific genre because they are so similar. I've linked to the research paper below.

Morphometry of the teeth of western North American tyrannosaurids and its applicability to quantitative classification