Aniksosaurus (meaning "spring lizard", from Modern Greek Άνοιξη, "Spring", referring to the fact it was found on 21 September 1995, the onset of Spring on the Southern Hemisphere) is a genus of dinosaur from what is now present-day Chubut Province, Argentina. It was a theropod, specifically a coelurosaur, which lived in the middle Cretaceous period, between 96-91 million years ago. The type species, Aniksosaurus darwini, was formally described by Rubén Dario Martínez and Fernando Emilio Novas in 2006;[1] the name was first coined in 1995 and reported in the literature in 1997.[2] The specific epithet honors Charles Darwin who visited Patagonia in 1832/1833 during the Voyage of the Beagle.