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Tyrannosaurus Rex Tooth Fragment

Tyrannosaurus Rex Tooth Fragment

Click here to see more Tyrannosaurus Rex Specimens!

Measuring 40ft (12m) in length and weighing upwards of 14 tons, Tyrannosaurus rex was one of the largest and most powerful terrestrial predators in history. The most advanced in an 80 million year chain of tyrannosaurid evolution, T. rex had heavy, deep skulls reinforced with sutures, lightened by hollow chambers... and of course very large and powerful teeth.

Including the root, T. rex teeth can reach up to 12" in length. The visible portion or crown for adults typically measures between 4" and 6" (though this varies by specific tooth location and type).

All teeth were recovered on private land from the Hell Creek Formation.

FRAGMENTS - The T. rex tooth fragment comes inside a classic, glass-topped riker display case measuring 4 1/2" x 3 1/2". A small information card is also enclosed that also serves as the certificate of authenticity. As pictured, the specimen is also enclosed in a small acrylic specimen jar.

Complete and Partial Teeth:

3.0" (AVAILABLE) - This complete premaxilla crown is an epic specimen. Likely position pm1 (right up front), this tooth is not only a large specimen but provides an exciting peek at the interior structure. This is a centerpiece fossil for any collection.

Above: The 3.0" Tooth, an incredible object to hold.

2.5" (SOLD) - This partial premaxilla tooth is a beautiful specimen. If it were complete, this tooth would be roughly 3.2" long. As it is, the tooth has a naturally missing tip. The concretion in which it was found has been left intact and serves as a mount on the reverse side (see image below). Likely position pm3.

Above: 2.5" partial tooth in hand. Displaying serrations and reverse side. Concretion serves as a natural stand.

1.75" (SOLD) - Complete maxilla crown. Likely position mx10 or mx11.

Above: 1.75" Tooth in hand. Beautiful serrations!


2.25" (SOLD) - Complete premaxilla crown with significant curvature of the leading (mesial) edge. Likely position pm1 or pm2.

Above: 2.25" Tooth in hand. Wicked curvature profile!


4.65" (SOLD) - This specimen is an adult T. rex tooth maxilla crown from an upper jaw bone.

Above: Tooth in Hand, not sure who has who in this picture to be honest. This is a huge tooth!

Note: All identification is based on standard measurements for theropod tooth analysis include crown base mesial-distal length (CBL); crown base labio-lingual width (CBW); crown height from apex to distal enamel base (CH); apical length from medial enamel base (AL), as well as curvature profiles. Data is compared to median values for T. rex teeth per Smith (2005).

Reference: Smith, Joshua B. "Heterodonty in Tyrannosaurus rex: implications for the taxonomic and systematic utility of theropod dentitions." Journal of Vertebrate Paleontology 25.4 (2005): 865-887. [PDF]

Above: Image from "A high-resolution growth series of Tyrannosaurus rex obtained from multiple lines of evidence". Teeth mx5 and mx6 are highlighted in red.

The T. rex tooth made its first appearance in the First Edition of the Mini Museum. It is also part of the Age of Dinosaurs Collection. 

More About Tyrannosaurus rex


Above: How do you like your T. rex? With scales or fluffy like a baby chick? The science is still unsettled about adults as depicted here but juveniles definitely had feathers.

"We need to start thinking of dinosaurs as not just brutes and not just monsters, and not just things with sharp teeth and sharp claws, but as really active, intelligent, energetic animals that oftentimes had keen senses. An animal like T. rex was a predator that used brain and brawn: its big brain, its great sense of smell and its really keen sense of hearing were probably as important to it, if not more so, than its sharp claws and its sharp teeth and its big jaw muscles."

~ Steve Brusatte, Paleontologist, University of Edinburgh, author of "The Rise and Fall of the Dinosaurs: A New History of a Lost World" (2018)

Various mechanical studies of T. rex power place the "Tyrant Lizard King" firmly at the top of the charts. Paired with this incredible power, T. rex also had some of the largest teeth of any carnivorous dinosaur, with the largest measuring 1ft (30 cm).

Despite popular depictions of poor depth perception, studies show that when compared to other giant theropods, tyrannosaurids had a wide postorbital skull which resulted in forward-facing eyes and acute binocular vision. The spine of a Tyrannosaurus Rex was subject to tremendous force. The size and strength of the vertebrae were essential to providing support for this enormous predator, but the entire apparatus also had to allow for rapid changes in movement and critical striking speed.

Studies suggest the great tyrannosaurids achieved their huge size through accelerated growth spurts. At the peak of its growth spurt, a young T. rex may have put on the better part of a ton annually.

Bite marks from conspecifics have been found on the skulls of large tyrannosaurids, suggesting they may have bitten each other in dominance or reproductive interactions. It’s possible some species were gregarious, perhaps even pack-hunters; the first known tyrannosaurid trackway, from a Late Cretaceous formation in British Columbia, hints at three animals traveling together.

Among the other dinosaurs bearing tyrannosaurid bite marks are ceratopsids, hadrosaurs, and other tyrannosaurs (reflecting the sort of opportunistic cannibalism also widespread among predators). Sauropods such as Alamosaurus, which overlapped with T. rex in North America, and Opisthocoelicaudia, which shared Asian landscapes with Tarbosaurus, may also have been tyrannosaurid quarry.

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