Gasosaurus (Chinese: 气龙属) was a tetanuran dinosaur discovered in Dashanpu, China. The scientific name, meaning "Gas Lizard", honours the gasoline company that found the Dashanpu fossil quarry in Sichuan Province, now named as the Lower Shaximiao Formation. It had strong legs but short arms, and like most theropods, it was a carnivore. It measured between 3.5 to 4 metres (11 to 13 ft) in length, with a weight of around 150 kilograms (330 lb), placing it in the midrange of theropods by size.