The creature is similar to the Tyrannosaurus rex with tiny arms and large hind legs. Skulls of these dinosaurs are unusual and had crests, horns and other protuberances. The skull of this dinosaur has been termed similar to those of iguana. Through the analysis of the skull, experts have also concluded that this species of dinosaurs may have had a greater and better sense of hearing. “A peculiarity of this dinosaur is that it has cavities in the ear area that other abelisaurids did not have, which could have given this species different auditory capacities, possibly a greater hearing range,” Federico Gianechin, one of the lead authors of the study told CNN. “This, together with its keen sense of smell, would have given great capabilities as a predator to this species.”