Deltadromeus is a possible ceratosaur, although some evidence points to it being an allosaur. It was a big predator nonetheless, attaining a length of 25-30 feet and weighing about 1 ton. It was relatively light-weight. This, along with long legs, suggests that it was a fast predator with a top speed of 25 to 30 miles per hour. Deltadromeus lived about 100 million years ago in Africa.