|Named By:||J. Lu, S. Li, G. Wang, J. Zhang & Z. Dong in 2006|
|Time Period:||Middle Jurassic|
|Location:||China, Yunnan Province - Zhanghe Formation|
|Size:||About 17 meters long|
|Fossil(s):||Partial post cranial remains|
|Classification:||| Chordata | Reptilia | Dinosauria | Sauropoda | Eusauropoda | Mamenchisauridae ||
Yuanmousaurus ("Yuanmou lizard") was a sauropod dinosaur from the Middle Jurassic period of China. It is known from incomplete remains, recovered in 2000 from the Zhanghe Formation in Yuanmou County in Yunnan Province. Yuanmousaurus was a relatively large sauropod and may have reached about 17 meters (56 ft) in length. It was a basal member of the Sauropoda, but its exact systematic position is unclear. A recent study placed Yuanmousaurus within the family Mamenchisauridae. The only and type species was Yuanmousaurus jiangyiensis.