Allosaurus was the most common large carnivore of the Late Jurassic in North America. It was a smaller predecessor of the Cretaceous Tyrannosaurus. Strong forelimbs with sharp claws, powerful hind ...

Fossil preservation over such vast ... a dinosaur graveyard containing a diverse mix of remains, such as Diplodocus, Camarasaurus, Allosaurus, and Stegosaurus, that had been brought together ...

The discovery comes from a handful of specimens including an extraordinarily complete and well-preserved fossil skeleton excavated from a site centered around an Allosaurus nest in northern ...