| Diet | Carnivore |
| Height | 0.8m |
| Length | 2.5m |
| Weight | 25 kg |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Theropod |
| Location | North America |
Acheroraptor was a fearsome theropod dinosaur that roamed the ancient landscapes of what is now Montana during the final days of the dinosaurs. Living between 67.2 and 66 million years ago, this predator witnessed the very end of the Cretaceous period, making it one of the last dinosaurs to exist before the mass extinction event.
As a member of the raptor family, Acheroraptor was built for hunting. It stood about 80 centimetres tall at the hip and measured approximately 2.5 metres in length, making it roughly the size of a large wolf. Like its famous relatives, this theropod possessed the characteristic sickle-shaped claws on its feet, which it used to slash and grip prey. Its sharp, serrated teeth were perfectly designed for slicing through flesh.
Acheroraptor lived in the lush, subtropical environment of the Hell Creek Formation, sharing its habitat with giants like Tyrannosaurus rex and Triceratops. As an agile predator, it likely hunted smaller dinosaurs, early mammals, and other vertebrates that lived in this diverse ecosystem. Its lightweight build and powerful leg muscles would have made it an excellent pursuit predator, capable of quick bursts of speed when chasing down prey.
What makes Acheroraptor particularly special is that it represents the only definitively identified raptor species from the Hell Creek Formation, giving us unique insights into how these remarkable predators survived right up until the end of the dinosaur age.
Acheroraptor possessed the classic raptor features including large, sickle-shaped claws on its feet and sharp, curved teeth with serrated edges. Its maxilla (upper jaw bone) shows distinctive characteristics that separate it from other raptors, including specific tooth placement and bone structure.
Acheroraptor was likely an active predator that used its speed and agility to hunt smaller prey. Like other raptors, it probably used its sickle claws to pin down and slash at victims whilst using its sharp teeth to deliver killing bites.
| Phylum | Chordata |
| Class | Saurischia |
| Order | Avetheropoda |
| Family | Dromaeosauridae |
| Genus | Acheroraptor |
Acheroraptor was first described by David Evans, Derek Larson, and Philip J. Currie in 2013. The original fossils were discovered at Hell Creek Formation, Montana, USA.
