Serrated, 1.54" Tyrannosaur Tooth - Judith River Formation

Serrated, Tyrannosaur Tooth - Judith River Formation #123513

This is a 1.54" long Tyrannosaur tooth 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. This specimen has very good enamel and serration preservation along both edges. The tip of this tooth is missing but this is likely the result of feeding behavior. The serrations on the distal edge of this tooth are in very good condition with slight wear.

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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