Aucasaurus is a genus of medium-sized abelisaurid theropod dinosaur from Argentina that lived during the Late Cretaceous (Santonian to Campanian stage) of the Anacleto Formation. It was smaller than the related Carnotaurus, although more derived in some ways, such as its extremely reduced arms and almost total lack of fingers.
In the Series 2 episode "Jungle of the Cannibal", a family of Aucasaurus were brought to the park from Late Cretaceous South America 70 million years ago.