Llukalkan (Mapuche for "one who causes fear") is a genus of abelisaurid theropod dinosaur from the Late Cretaceous Bajo de la Carpa Formation of Argentina.

It was described as belonging to the new taxon Llukalkan aliocranianus in 2021; the generic name is Mapuche for "one who scares" or "one who causes fear", and the specific name is Latin for "different skull".

Llukalkan is very similar to Viavenator, except that it is smaller and the holes in the skull through which the veins pass are larger and more widely separated from the supraoccipital crest, among other differences.

It also has a small posterior air-filled sinus in the middle ear zone, a recessus tympanicus caudalis, that has not been found in any other abelisaurids and thus is an autapomorphy.

[1] Kryptops Rugops Majungasaurinae Xenotarsosaurus Dahalokely Rahiolisaurus Ilokelesia Ekrixinatosaurus Skorpiovenator Pycnonemosaurus Quilmesaurus Viavenator Llukalkan Carnotaurus Aucasaurus Abelisaurus