The first, and only, fossils discovered were several skull bones found in Argentina. Scientists put them back together in the lab to create a skull. The skull is similar to that of other members of its family. Like most abelisaurs, it is blunt and short in length, but tall in vertical height from a front view. "Abelisaurus" probably preyed on the large sauropod dinosaurs of the time, such as "Amargasaurus", in packs. It may also have hunted smaller plant-eating dinosaurs, such as the small ornithopod "Gasparinisaura".