2.1" Exceptional, Serrated, Tyrannosaur Tooth - Judith River Formation

This is a beautiful, 2.1" 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. The rock that the tooth is still attached to also contains what is likely the root of a fossil crocodilian tooth.

The tooth has excellent enamel, fine serrations on both edges of the blade and very minor tip wear. There is absolutely no repair or restoration to the tooth, though there is glue stabilization of the rock around the tooth.

There are three described Tyrannosaurs from the Two Medicine Formation & Judith River Formation; 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 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 the reptiles, avian and non-avian dinosaurs (birds). Among the more interesting specimens is Leonardo, a mummified and fossilized Brachylophosaurus. This is a Hadrosaur, a duck-billed dinosaur with amazing preservation of the soft tissues of the body. The pattern in the skin of the 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.


DETAILS
SPECIES
Albertosaurus, Gorgosaurus or Daspletosaurus
LOCATION
Hill County, Montana
FORMATION
Judith River Formation
SIZE
Tooth: 2.1" long (straightline), Entire Specimen: 2.5 x 1.2"
CATEGORY
SUB CATEGORY
ITEM
#200257
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