Description
Genuine Tyrannosaurus Rex Tooth Fossil from the Hell Creek Formation
This authentic Tyrannosaurus rex partial tooth fossil originates from the world-famous Hell Creek Formation of Garfield County, Montana, USA, one of the most important Late Cretaceous fossil localities in North America. Tyrannosaurus rex is among the most iconic predatory dinosaurs ever discovered, and fossil teeth from this species are highly sought after by collectors, palaeontology enthusiasts, and natural history institutions.
The specimen offered here represents a partial fossilised tooth from Tyrannosaurus rex, preserving the characteristic robust structure typical of large theropod dinosaur teeth. Tyrannosaurus teeth were designed for powerful bone-crushing bites, and even partial examples provide fascinating insight into the feeding biology of this apex predator.
The photographs in this listing show the exact fossil specimen you will receive, allowing collectors to view the fossil’s preservation, texture, and morphology before purchase. Full sizing can be clearly seen in the listing photos.
This fossil is a genuine specimen and includes a Certificate of Authenticity lifetime guarantee generic card, confirming its authenticity.
Taxonomic Identification and Classification
Tyrannosaurus rex belongs to a group of large carnivorous theropod dinosaurs that dominated terrestrial ecosystems near the end of the Cretaceous Period.
Scientific classification includes:
- Kingdom: Animalia
- Phylum: Chordata
- Class: Reptilia
- Clade: Dinosauria
- Order: Saurischia
- Suborder: Theropoda
- Family: Tyrannosauridae
- Genus: Tyrannosaurus
- Species: Tyrannosaurus rex
The species Tyrannosaurus rex was formally described in 1905 by American palaeontologist Henry Fairfield Osborn of the American Museum of Natural History.
Tyrannosaurids were among the largest terrestrial predators in Earth’s history, with Tyrannosaurus rex reaching lengths of up to approximately 12 metres and possessing some of the most powerful jaws known among dinosaurs.
Geological Age and Stratigraphy
This fossil originates from the Hell Creek Formation, a geological formation dating to the Late Cretaceous Period, specifically the Maastrichtian Stage, approximately 66–68 million years ago.
The Hell Creek Formation extends across parts of Montana, North Dakota, South Dakota, and Wyoming. It is internationally recognised for its exceptionally rich fossil record documenting the final ecosystems that existed shortly before the Cretaceous–Paleogene mass extinction event.
Sediments of the Hell Creek Formation consist primarily of:
- Sandstone
- Mudstone
- Siltstone
- Lignite coal deposits
These sediments were deposited in ancient river systems, floodplains, and coastal environments.
Tooth Morphology and Feeding Adaptations
Tyrannosaurus rex teeth are distinctive among theropod dinosaurs. Unlike the slender blade-like teeth of many other carnivorous dinosaurs, Tyrannosaurus teeth are thick, conical, and heavily built, adapted to withstand tremendous biting forces.
Typical morphological features include:
- Thick, robust tooth cross-section
- Slight backward curvature
- Serrated cutting edges known as denticles
- Strong enamel surface designed for durability
The serrations along the tooth edges helped Tyrannosaurus tear through flesh and bone, while the overall shape of the tooth allowed the animal to grip and crush prey effectively.
Even partial teeth often preserve portions of these serrated edges or enamel surfaces, making them identifiable as tyrannosaurid fossils.
Depositional Environment of the Hell Creek Formation
During the Late Cretaceous, the region that is now Montana formed part of a vast lowland environment near the western shoreline of the Western Interior Seaway, a large inland sea that divided North America.
The Hell Creek ecosystem consisted of:
- River channels and floodplains
- Forested lowlands
- Swamps and wetlands
- Seasonal river systems
These environments supported a diverse range of animals including dinosaurs, crocodilians, turtles, fish, mammals, and plants.
Other dinosaurs commonly discovered in the Hell Creek Formation include:
- Triceratops
- Edmontosaurus
- Ankylosaurus
- Pachycephalosaurus
Tyrannosaurus rex occupied the role of apex predator within this ecosystem.
Fossilisation Process
Dinosaur teeth fossilise when the original tooth becomes buried in sediment shortly after being shed or lost. Over millions of years, minerals carried by groundwater gradually replace the original biological material, preserving the structure of the tooth as stone.
The Hell Creek Formation is particularly known for preserving isolated dinosaur teeth because theropods frequently replaced their teeth throughout life. Tyrannosaurus rex likely shed dozens of teeth over its lifetime, increasing the chances that individual teeth would become fossilised.
Collecting and Scientific Interest
Tyrannosaurus rex fossils represent some of the most iconic specimens in palaeontology. Teeth from this species are especially valued because they provide direct evidence of the anatomy and feeding behaviour of this enormous predator.
Collectors appreciate Tyrannosaurus rex tooth fossils for several reasons:
- Direct association with one of the most famous dinosaurs in history
- Geological origin from the Late Cretaceous Hell Creek Formation
- Distinctive morphology of tyrannosaurid teeth
- Historical significance in palaeontological research
Such fossils are frequently displayed in natural history collections, palaeontology displays, and educational exhibits.
Authentic Fossil Specimen
This specimen is a genuine Tyrannosaurus rex partial tooth fossil from the Hell Creek Formation in Garfield County, Montana, USA. It has been carefully selected for its preservation and collector appeal.
Key features include:
- Authentic Tyrannosaurus rex tooth fossil (partial)
- Formation: Hell Creek Formation
- Age: Late Cretaceous, Maastrichtian Stage
- Locality: Garfield County, Montana, USA
- Family: Tyrannosauridae
- Apex predator theropod dinosaur fossil
- Exact specimen shown in listing photographs
- Full sizing visible in listing images
- Includes Certificate of Authenticity lifetime guarantee generic card
This remarkable fossil provides a direct connection to the ancient ecosystems of the Late Cretaceous and one of the most formidable predators ever to walk the Earth, making it an exceptional addition to fossil collections and natural history displays.
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