.77" Juvenile Tyrannosaur Premax Tooth - Judith River Formation

Juvenile Tyrannosaur Premax Tooth - Judith River Formation #225858

This is a .77" long, Tyrannosaur premaxillary tooth from the Judith River Formation of Montana. This formation is approximately 74 million years old, or about 9 million years older than the Hell Creek Formation which produces T-Rex.

These oddly shaped teeth with two ridges located on the lingual side were originally described as Aublysodon more than a century ago based on isolated teeth and jaw fragments. More recent discoveries of more complete Tyrannosaur skeletons from this formation has led to the discovery that these teeth are actually the premaxillary teeth from juveniles of other Tyrannosaur species.

There is a repaired crack at the tip of this tooth.

Comes in an acrylic display case.

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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