| Diet | Carnivore |
| Height | 0.4m |
| Length | 1m |
| Weight | 1.5 kg |
| Environment | Land |
| Era | Jurassic |
| Period | Middle Jurassic |
| Type | Theropod |
| Location | China |
Aorun was a small carnivorous theropod dinosaur that lived approximately 165 million years ago during the Middle Jurassic period. This diminutive predator roamed what is now western China, making it one of the oldest known coelurosaurian dinosaurs, though some scientists debate whether it might actually belong to the carnosaurian group instead.
Measuring only about 1 metre in length and standing roughly 40 centimetres tall at the hip, Aorun was about the size of a large domestic cat. Despite its small stature, this theropod was built for hunting, with sharp teeth and powerful legs that allowed it to pursue small prey across the ancient landscape. Its lightweight build, estimated at around 1.5 kilograms, would have made it an agile and quick-moving predator.
As a carnivore, Aorun likely fed on small vertebrates, insects, and other creatures it could overpower. Its teeth were well-suited for gripping and tearing flesh, typical of theropod dinosaurs. The discovery of Aorun has provided valuable insights into the early evolution of coelurosaurian dinosaurs, the group that would eventually give rise to birds.
Living during the Middle Jurassic, Aorun inhabited a world very different from today's China, with a warm, humid climate and lush vegetation that supported diverse dinosaur communities.
Aorun was distinguished by its very small size for a theropod dinosaur and its primitive features that place it among the earliest known coelurosaurians. It had the typical theropod body plan with long legs, sharp claws, and carnivorous teeth, but scaled down to a remarkably compact size.
Aorun likely hunted small prey using its speed and agility, darting between vegetation to catch insects, small reptiles, and early mammals. Its small size would have allowed it to exploit ecological niches unavailable to larger predators, possibly hunting both during the day and at dawn or dusk when smaller prey animals were most active.
| Phylum | Chordata |
| Class | Saurischia |
| Order | Avetheropoda |
| Genus | Aorun |
Aorun was first described by James Clark and colleagues in 2013. The original fossils were discovered at Shishugou Formation, Xinjiang, China.
