Some of the largest terrestrial carnivores that have ever existed belong to this group of theropod dinosaurs — the carnosaurs or "flesh lizards." Tyran-nosaurus is the most familiar member of the group. They were massively built animals, and dominated life in Jurassic and Cretaceous times.
Their efficiency as predators is, however, debatable. In reality, the largest of them, such as Tyrannosaurus and Tar-bosaurus, could have been part-time scavengers. They may have been the "hyenas" of the dinosaur world rather than the "lions." Their sheer bulk would, most likely, have precluded any sustained chase. But they could have ambushed prey, and attacked in short bursts of speed, like a modern tiger.
There were also other smaller carnosaurs, lighter and more agile than their giant contemporaries.
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