2.01" Tyrannosaur Tooth - Montana

This is a robust 2.01" Tyrannosaurid 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.

There are good serrations on both edges and an interesting wear facet on the tip where it was rubbing against another tooth. This tooth was originally found in two pieces with some separation between the pieces. The end of one piece was compressed, so they didn't fit together a perfectly as hoped.

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