Ankistrodon Facts
| Diet | Carnivore |
| Height | 0.5m |
| Length | 2m |
| Weight | 50 kg |
| Environment | Land |
| Era | Triassic |
| Period | Triassic |
| Type | Other |
| Location | India |

| Diet | Carnivore |
| Height | 0.5m |
| Length | 2m |
| Weight | 50 kg |
| Environment | Land |
| Era | Triassic |
| Period | Triassic |
| Type | Other |
| Location | India |
Although once thought to be a theropod dinosaur, Ankistrodon is now known to be an archosauriform reptile that lived during the Early Triassic period, around 252 to 247 million years ago. This ancient reptile was first described by the renowned British zoologist Thomas Henry Huxley in 1865, based on fossil remains discovered in the Panchet Formation of India. Initially classified as a dinosaur due to its teeth, scientific understanding has evolved significantly since its discovery.
Ankistrodon was actually a proterosuchid, an early group of archosauriform reptiles that were among the ancestors of crocodiles, dinosaurs, and other archosaurs. These creatures were important in understanding the evolution of later reptile groups. As a carnivorous reptile, Ankistrodon would have hunted smaller animals in the recovering ecosystems following the devastating Permian-Triassic extinction event.
The creature was relatively modest in size, estimated to have been around 2 metres in length and standing about half a metre tall. Like other proterosuchids, it would have been a quadrupedal predator with a robust build and powerful jaws filled with curved teeth - the feature that gave it its name, meaning 'curved tooth'.
However, recent scientific analysis has cast doubt on Ankistrodon's validity as a distinct genus. In 2023, researcher Ezcurra determined that the teeth upon which the genus was based are indistinguishable from those of Proterosuchus, making Ankistrodon a nomen dubium - a name of doubtful validity in scientific classification.
Ankistrodon was characterised by its curved, pointed teeth that gave the genus its name. As a proterosuchid, it would have had a robust, quadrupedal build with a relatively long skull and powerful jaws suited for catching prey.
As an early archosauriform predator, Ankistrodon likely hunted smaller reptiles and other vertebrates in the Early Triassic landscapes of India. It would have been a terrestrial predator, using its curved teeth to grip and process prey.
Ankistrodon was first described by Thomas Henry Huxley in 1865. The original fossils were discovered at Panchet Formation, India.