Tralkasaurus cuyi (name meaning: "Thunder lizard") is a genus of abelisaurid theropod from the Late Cretaceous Huincul Formation in the Río Negro Province of Argentina. Its name comes from the Mapuche word "tralka", meaning "thunder."


Tralkasaurus is a new genus and species of medium-sized abelisaurid theropod dinosaur. Tralkasaurus cuyi has been discovered by Dr. Mauricio Cerroni from the Argentine Museum of Natural Sciences and CONICET and his colleagues.

Image 8129e-Tralkasaurus-cuyi

An artist’s impression of Tralkasaurus cuyi. Image artist: Sebastian Rozadilla.

Tralkasaurus cuyi lived approximately 90 million years ago in what is now Patagonia, Argentina. It belongs to Abelisauridae, a group of ceratosaurian theropod dinosaurs that thrived during the Cretaceous period on the supercontinent Gondwana.

The incomplete fossilized skeleton of Tralkasaurus cuyi, including a jaw and vertebra, were discovered at the Violante Farm fossil site in Río Negro province, northern Patagonia. [1]



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