0.8" Tyrannosaur Serrated Fossil Tooth Cretaceous Dinosaur Judith River FM MT COA
Location: Judith River Formation, Hill County, Montana (Private Land Origin)
Weight: 0.3 Ounces
Dimensions: 0.8 Inches Long, 0.4 Inches Wide, 0.2 Inches Thick
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Probably an excellent Albertosaurus or Gorgosaurus tooth, based on the size and base height of the tooth cross-section
Name: Albertosaurus, Gorgosaurus, and Daspletosaurus
Type: Carnivore.
Time period: Cretaceous Age, 70 to 75 Million Years old
Around 70 million years ago, during the Late Cretaceous, northern North America was inhabited by formidable Tyrannosaurs, including Albertosaurus, Daspletosaurus, and Gorgosaurus. These predators lived in regions now represented by the Judith River Formation in Montana and various formations in Alberta, Canada. The Judith River Formation predates the famous Hell Creek Formation, home of Tyrannosaurus rex, by about five million years. All three species are early relatives of T. rex and, while large and powerful, were smaller than their later cousin.
Daspletosaurus and Gorgosaurus were comparable in size, coexisting at lengths of roughly 30 feet and weights of up to 5,000 pounds, dominating their ecosystems as apex predators. Albertosaurus also reached about 30 feet long but was lighter, with a maximum weight near 4,000 pounds, and appears to have evolved slightly after its Judith River relatives.
The teeth of these tyrannosaurs share similar size and morphology, making isolated specimens challenging to identify. Daspletosaurus, being slightly larger and closely related to Tyrannosaurus rex, had teeth more similar to T. rex, while Albertosaurus' teeth were smaller, more slender, and specialized for slicing flesh.
These exquisitely preserved Late Cretaceous tyrannosaur fossils and teeth from northern North America highlight the diversity of early T. rex relatives, providing remarkable insight into the evolution, hunting adaptations, and predatory dominance of these iconic dinosaurs.
