Though not quite as well known as Tyrannosaurus Rex, Allosaurus was just as fearsome. This Jurassic Predator had sharp claws and teeth to help it hunt down prey that likely included Stegosaurus. History: Allosaurus was an apex predator during the Late Jurassic Period, around 150 million years ago. During the Bone Wars of the late 1800s, early paleontologists were rushing to name as many species as possible, and so many early Allosaurus fossils were originally named something else. The eventual name that stuck, which means different lizard referred to the animal's neck and backbones, which were unlike any other dinosaur known at the time. Scientific Name: Allosaurus (Different Lizard) Characteristics: This Allosaurus toy is sculpted in a dynamic walking stance, mouth agape and showing its teeth. It features the dinosaur's characteristic crests above its eyes, as well as its three-clawed hands. Its tail is raised high for balancing.