Most experts have assumed that the allosaurs, about 35 feet long, were the worst threats to the herbivores of the Jurassic, some of which were gigantic and probably able to fend off even an allosaur. But epanterias would have spelled trouble for everyone.
As quoted in Malcolm W. Browne, Scientist Raises Question: Is Tyrannosaurus Still Rex?, The New York Times (January 4, 1990)
Scientist Raises Question - Is Tyrannosaurus Still Rex? - NYTimes.com