Kingdom Animalia
Phylum Chordata
Superclass Tetrapoda
Class Reptilia
Subclass Diapsida
Superorder Dinosauria
Order Saurischia
Suborder Theropoda
Family Dromaeosauridae
Subfamily Velociraptorinae
Genus Acheroraptor
1st Species Acheroraptor temertyorum
Other attributes
Time Range 66 mya
Location United States of America
Name Meaning Hell thief
Physical Dimensions 1.7 meters long
Dietary Classification Carnivore

Comparison of the only known specimen of A.temertyorum with an 1.8 meter tall human. Click to expand.

Acheroraptor is a dromaeosaurid theropod dinosaur from the Late Cretaceous of the United States of America. It was named in 2013 by David C. Evans and his crew. It was found out to be all the Dromaeosaurus remains in Montana, and currently remains as the only dromaeosaur in the Late Cretaceous Northwestern United States.


Like its cousin, Velociraptor, Acheroraptor was a lightly-built dromaeosaur. It had a slender body, moderately long legs with a sickle-shaped claw on each foot, a long tail, long arms with 3 fingers on each hand, a moderately long neck, and a long, bird-like head with a mouth containing lots of teeth. Most of its body (excluding some of its legs and all of its snout) would have been covered in long, vaned feathers.


Acheroraptor was a predator, preying on small mammals and lizards. Its teeth had knife-like serrations from back to back, and its sickle claw was used for restraining prey.


Acheroraptor had the same leg proportions as its Asian cousin, and so, would have been a relatively slow runner. However, many of its prey items were relatively small, and so, it did not need to run that fast in order to catch them. Since it did not hunt any large prey, its sickle claw was used for pinning prey to the ground. In order to hunt, it would have needed to pounce on a small mammal, press it to the ground with its sickle claw, and tear chunks of its flesh off while it was alive.

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