Paleontologists have discovered a new dinosaur species in Argentina, dubbing it Llukalkan aliocranianus. Llukalkan means the one who causes fear in the Mapuche language, and aliocranianus is Latin for unusual skull.

The dinosaurs remains were found in the Bajo de la Carpa Formation, a body of rock that spans Argentinas Ro Negro and Neuqun provinces, and the Journal of Vertebrate Paleontology published details of its unearthing on Wednesday.

The creature, which existed around 80 million years ago, belonged to the abelisaurids family, a group of carnivorous apex predators most prominent during the Cretaceous period and similar to the famous Tyrannosaurus rex, with tiny arms and large hind legs.

These dinosaurs skulls were unusual, however, and had crests, horns and other protuberances. The bumps on Llukalkan aliocranianus head were likely similar to those of an iguana or Gila monster.