Saurophaganax maximus was thought to be a very large predatory theropod that lived in the famous Morrison Formation of Jurassic North America. Several of the bones assigned to this genus were very ...

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 ...