1.05" Juvenile Tyrannosaur Premax Tooth - Judith River Formation

This is a 1.05" Tyrannosaur premaxillary tooth from the Judith River Formation of Montana. This formation is approximately 70 million years old, or about 5 million years old than the Hell Creek Formation which produces T-Rex.

Beautiful enamel preservation on this tooth, however there is feeding wear to the tip and edges. Comes with an acrylic display case.

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

There are three described Tyrannosaurs from the Two Medicine Formation (Judith River Group), 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 genre because they are so similar.

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

DETAILS
SPECIES
Albertosaurus, Gorgosaurus or Daspletosaurus
LOCATION
Montana
FORMATION
Judith River Formation
SIZE
1.05" long
CATEGORY
SUB CATEGORY
ITEM
#93723
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