Datousaurus bashanensis

Datousaurus (meaning "chieftain lizard" or "big-head lizard"; originally named using the Malay datu, after its Chinese nickname qiulong - literally "chieftain dragon" - but also a pun on its big head; da tou means "big head" in Chinese) is a sauropod dinosaur from the Middle Jurassic Lower Shaximiao Formation in Sichuan province, China. It shared the local Middle Jurassic landscape with other sauropods such as Shunosaurus, Omeisaurus, and Protognathosaurus, the neornithischian Xiaosaurus, and the early stegosaur Huayangosaurus as well as the carnivorous Gasosaurus.