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1.37" Serrated Tyrannosaur Tooth - Judith River Formation
This is a beautiful, 1.37" long serrated tyrannosaur tooth collected this summer 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 produces Tyrannosaurus rex. Based on the carinae locations, the tooth would have been positioned near the anterior end of the skull.
The serrations along the distal edge remained intact and the tooth is free of repair or restoration. The enamel is weathered and there is some feeding wear on each side of the tooth.
The serrations along the distal edge remained intact and the tooth is free of repair or restoration. The enamel is weathered and there is some feeding wear on each side of the tooth.
Comes with a floating frame display case.
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
Morphometry of the teeth of western North American tyrannosaurids and its applicability to quantitative classification
About the Judith River Formation
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.
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.
SPECIES
Albertosaurus, Gorgosaurus, or Daspletosaurus
LOCATION
Hill County, Montana
FORMATION
Judith River Formation
SIZE
1.37" long (straight-line)
CATEGORY
SUB CATEGORY
ITEM
#335899
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