Allosaurus, (genus Allosaurus), subsumes Antrodemus, large carnivorous dinosaurs that lived from 150 million to 144 million years ago during the Late Jurassic Period; they are best known from fossils found in the western United States, particularly from the Cleveland-Lloyd Quarry in Utah and the Garden Park Quarry in ...

When did Allosaurus go extinct?

There were at least 3 species of Allosaurus at various times in the late Jurassic. By the end of the late Jurassic, Allosaurus went extinct with many of the other dinosaurs during the faunal turnover leading into the Cretaceous.

What killed the Allosaurus?

Fossil shows that allosaurus was maimed by tail spike attack

BELOW THE BELT The tail spike on a Stegosaurus (illustrated above) has been implicated in the death of an Allosaurus 147 million years ago.