Coelurosauravus (name meaning "Hollow Lizard") is a genus of basal diapsid reptile that originated during the Late Permian Era in what is now Madagascar. A small lizard-like creature resembling a green iguana or other modern-day lizards, it had specialized wing-like structures allowing it to glide, similarly to the modern-day Flying Dragon from South-east Asia.
Thought to have been extinct for 250 million years, there are still some that remain alive on Primeval Island.