Original: As the most abundant large predator in the Morrison Formation , Allosaurus was at the top of the food chain , probably preying on contemporaneous large herbivorous dinosaurs and perhaps even other predators ( e.g. Ceratosaurus ) .
Simplified: Allosaurus was at the top of the food chain . It probably preyed on large herbivorous dinosaurs and perhaps even other predators ( e.g. Ceratosaurus ) .