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Deinodon News

deinodon: carnivore dinosaur from the Cretaceous era

Deinodon Facts

Pronunciation: DIE-no-don

Name meaning: Terrible Tooth

Diet	Carnivore
Height	Unknown
Length	Unknown
Environment	Land
Era	Cretaceous
Period	Late Cretaceous
Type	Theropod
Location	North America

Deinodon holds a special place in dinosaur history as the very first theropod to be scientifically described, though its true identity remains a mystery. Named by American palaeontologist Joseph Leidy in 1856, this enigmatic dinosaur is known only from a handful of fossilised teeth discovered in the Judith River Formation of Montana, making it what scientists call a 'nomen dubium' - a doubtful name.

The teeth that define Deinodon were collected by explorer Ferdinand Vandeveer Hayden during geological surveys of the American West. These curved, serrated teeth clearly belonged to a carnivorous theropod that lived between 83.6 and 72.2 million years ago during the Late Cretaceous period. The teeth show slight heterodonty, meaning they varied in shape and size depending on their position in the jaw, which is typical of large predatory dinosaurs.

Unfortunately, teeth alone cannot tell us much about Deinodon's size, appearance, or behaviour. The fossil evidence is simply too fragmentary to determine whether these teeth belonged to a distinct species or to another well-known dinosaur like Albertosaurus or Gorgosaurus, which lived in the same time and place. Some scientists suspect that Deinodon may actually represent juvenile teeth from these other tyrannosaurs.

Despite its uncertain status, Deinodon represents an important milestone in palaeontology, marking humanity's first scientific encounter with the group of massive predators that would later include the famous Tyrannosaurus rex.

What made Deinodon distinctive?

Deinodon's only known features are its curved, serrated teeth that show slight variation in shape and size. The teeth are typical of large carnivorous theropods but lack any unique characteristics that would distinguish them from other tyrannosaurs.

Behaviour

Without body fossils, Deinodon's behaviour can only be inferred from its teeth, which suggest it was a carnivorous predator that likely hunted other dinosaurs. The serrated edges would have been ideal for slicing through flesh and bone.

Fun Facts About Deinodon

Deinodon was the very first tyrannosaur ever described by science, predating even Tyrannosaurus rex by 49 years
The original Deinodon teeth were collected during one of the first major geological surveys of the American West
Some scientists believe that another dubious dinosaur, Aublysodon, might actually be the same animal as Deinodon
Joseph Leidy chose the name 'terrible tooth' because the serrated edges reminded him of a fearsome predator's weapon
The Judith River Formation where Deinodon was found has since yielded fossils of many complete tyrannosaurs

Discovery

Deinodon was first described by Joseph Leidy in 1856. The original fossils were discovered at Judith River Formation, Montana, USA.

Deinodon FAQ

What did Deinodon eat?

Based on its sharp, serrated teeth, Deinodon was clearly a carnivore that fed on other dinosaurs. The curved shape and serrated edges were perfect for slicing through flesh and bone, suggesting it was an active predator.

How big was Deinodon?

Unfortunately, we don't know how big Deinodon was because only teeth have been found. Without body fossils like leg bones or vertebrae, it's impossible to estimate its size or weight.

When did Deinodon live?

Deinodon lived during the Late Cretaceous period, between 83.6 and 72.2 million years ago. This was near the end of the age of dinosaurs, shortly before the mass extinction event.

Where was Deinodon found?

Deinodon fossils were discovered in the Judith River Formation of Montana, USA. This rock formation has produced many important dinosaur fossils from the Late Cretaceous period.

How do you pronounce Deinodon?

Deinodon is pronounced 'DIE-no-don', with the emphasis on the first syllable. The name comes from Greek words meaning 'terrible tooth'.

What does Deinodon mean?

Deinodon means 'terrible tooth' in Greek. Joseph Leidy chose this name because the serrated, curved teeth looked like the fearsome weapons of a prehistoric predator.

How fast could Deinodon run?

We have no way of knowing how fast Deinodon could run because only teeth have been found. Speed estimates require leg bones and body proportions that we simply don't have.

What type of dinosaur was Deinodon?

Deinodon was a theropod dinosaur, specifically believed to belong to the Tyrannosauridae family. However, this classification is based only on teeth, making it quite uncertain.

Was Deinodon related to birds?

Yes, as a theropod dinosaur, Deinodon would have been related to modern birds. All theropods, including the tyrannosaurs, are part of the dinosaur lineage that gave rise to birds.

How many Deinodon fossils have been found?

Very few Deinodon fossils have been found - just a handful of isolated teeth from the original 1850s discovery. No additional body parts like bones or claws have ever been identified.