Aublysodon Facts
| Diet | Carnivore |
| Height | 3m |
| Length | 8m |
| Weight | 2 tonnes |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Theropod |
| Location | North America |

| Diet | Carnivore |
| Height | 3m |
| Length | 8m |
| Weight | 2 tonnes |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Theropod |
| Location | North America |
Aublysodon is one of palaeontology's most problematic theropod dinosaurs, known only from isolated teeth discovered in the Judith River Formation of Montana. First described in 1868 by Joseph Leidy, this mysterious creature lived during the Late Cretaceous period, roughly 94 to 72 million years ago. However, Aublysodon is considered a 'nomen dubium' - a doubtful name - because the fossil evidence is too fragmentary to definitively identify it as a distinct species.
The teeth that define Aublysodon are characteristically blunt and D-shaped in cross-section, which is how it earned its name meaning 'blunt tooth'. These dental features initially suggested it was a tyrannosaurid theropod, possibly related to the famous Tyrannosaurus rex. Based on the size and shape of these teeth, scientists have estimated that Aublysodon may have been a medium-sized predator, potentially reaching lengths of around 8 metres and standing about 3 metres tall at the hip.
As a carnivorous theropod, Aublysodon would have been a bipedal predator that hunted other dinosaurs in the ancient floodplains and forests of Late Cretaceous North America. Its blunt teeth suggest it may have been adapted for crushing bone or processing tough meat, rather than the blade-like slicing teeth seen in some other theropods.
The scientific uncertainty surrounding Aublysodon highlights the challenges palaeontologists face when working with incomplete fossil material, and serves as a reminder that our understanding of prehistoric life continues to evolve as new discoveries are made.
Aublysodon's most distinctive feature was its characteristically blunt, D-shaped teeth that were quite different from the sharp, blade-like teeth of many other theropods. These robust teeth suggested powerful jaw muscles and a bite adapted for crushing rather than slicing.
Based on its dental characteristics, Aublysodon likely engaged in bone-crushing feeding behaviour, possibly scavenging carcasses or hunting prey that required powerful bite forces to subdue. As a theropod, it would have been an active, bipedal predator that may have hunted alone or in small groups.
Aublysodon was first described by Joseph Leidy in 1868. The original fossils were discovered at Judith River Formation, Montana, USA.