2.52" Serrated Tyrannosaur Tooth in Situ - Judith River Formation

Serrated Tyrannosaur Tooth in Situ - Judith River Formation #200259

This is a beautiful, 2.52" long serrated Tyrannosaur tooth collected this summer from the Judith River Formation of Montana. This formation is approximately 70 million years old, or about 5 million years older than the Hell Creek Formation which produces T-Rex. It has been almost entirely exposed from the rock it was found in, though a significant amount of rock was left in place for an in situ presentation.

The tooth has nice enamel preservation, fine serrations on both edges of the blade and very minor tip wear. There are two repaired cracks through the tooth where the rock and tooth broke during collection. The rock has been stabilized with glue to prevent further breakage of both the tooth and rock.

It comes with an acrylic display stand.

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

The Judith River Formation is one of the world's most prolific sources of Late Cretaceous vertebrate fossils. At least sixteen Orders containing more than forty Genera are known from the formation. These include fish, amphibians, mammals, and insects in addition to reptiles and avian (birds) and non-avian dinosaurs. Among the more interesting specimens is Leonardo, a mummified and fossilized Brachylophosaurus. This is a hadrosaur, a duck-billed dinosaur found with amazing soft-tissue preservation: skin impressions can be found on 90 percent of its body! The pattern in the skin on its feet is even preserved. In addition to Leonardo, the Judith River Formation contains the remains of the theropod Hesperornis, the only known freshwater Hespernorthid, a penguin-like bird.

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