The jaws also curved upward, a trait shared with some other abelisaurs. The skull is estimated to be approximately 83 cm long based on comparisons with Carnotaurus and Majungasaurus, and while Abelisaurus does not have a complete maxilla its preserved size is similar to that of Ekrixinatosaurus. As in other abelisaurids, the facial bones, especially the nasal bones, were sculptured with numerous small holes and spikes.
The jaws of this dinosaur also curved upward, a trait shared by some other abelisaurs. The skull is estimated to be about 83 cm long based on comparisons with Carnotaurus and Majungasaurus.  While Abelisaurus lacks a complete maxilla, its preserved size is similar to that of Ekrixinatosaurus. Like other abelisaurids, the facial bones, particularly the nasal bones, were adorned with numerous small holes and spikes.