Allosaurus´s kryptonite

PALEONTHOLOGIST: When we find the allosaurus that has been killed, we don´t know what animal could make this. Then we find a teeth of a ceratosaurus, all changes.
An allosaurus is searching for food. But he is neerby of the prey of a pair of ceratosaurus. They think that he would eat their food. Allosaurus is the biggest predator of jurassic, so he don´t worry about that. One ceratosaurus jump and landed in a flank of the allosaurus. At the same time the other ceratosaurus bites the allosaurus´s leg. The allosaurus doesn´t have nothing of life and slows to the ground.
PALEONTHOLOGIST: For other 20 million years allosaurus and ceratosaurus kill betwen them. In North America, a dinosaur shows other, who was the boss of the prehistoric battle places