1.06" Tyrannosaur Tooth - Judith River Formation

Tyrannosaur Tooth - Judith River Formation #128514

This is a 1.06" long Tyrannosaur tooth on stone, from the Judith River Formation of Montana. This formation is approximately 75 million years old, or about 9 million years older than the Hell Creek Formation which also produces T. rex. The tooth has quite a bit of wear and a couple of repaired cracks. About half of the serrations on one edge are visible.

Three species of tyrannosaur have been described from the Two Medicine & Judith River Formations: 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 genus because they are so similar.

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

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