Ekrixinatosaurus novasi was a large theropod from the Abelisauridae family. It was a bipedal carnivore, with a large head, tiny arms, stocky legs, and a large tail.
Ekrixinatosaurus would have lived in the Late Cretaceous plains of what is now Northern Neuquén province of Argentina.
The holotype consists of a partial skull and varied bones from the rest of the body. It was discovered in 2004 by the Gasoducto del Pacífico Company when they were constructing a section of pipeline in the rock formation called Baja del Añelo. It was described in 2004 as well.
Ekrixinatosaurus, meaning "explosion-born lizard", refers to the fact that the specimen was discovered as the result of an explosion used to prepare the area for pipeline construction. "Novasi" is to honour Fernando E. Novas, and his important work in abelisaurid research.