Shantungosaurus

Shantungosaurus, meaning "Shandong Lizard", is a genus of saurolophine hadrosaurid dinosaurs found in the Late Cretaceous Wangshi Formation of the Shandong Peninsula in China.

Description
Shantungosaurus giganteus is one of the largest known ornithischians, the type skull is 1.63 metres (5.3 ft) long[1] and the composite skeleton mounted at the Geological Institute of China in Beijing measures 14.72 metres (48.3 ft) in length[2] while another mounted skeleton, originally referred to "Zhuchengosaurus maximus", measures 16.6 metres (54 ft) in length.[3] The largest individuals may have weighted as much as 16 tonnes (18 short tons).[4] Like all hadrosaurs its beak was toothless, but its jaws were packed with around 1,500 tiny chewing teeth. A large hole near its nostrils may have been covered by a loose flap, which could be inflated to make sounds.

Discovery and species
First described in 1973, Shantungosaurus is known from over five incomplete skeletons. Chinese scientist Xing Xu and his colleagues indicate that Shantungosaurus is very similar to and shares many unique characters with Edmontosaurus, forming an Asian node of Edmontosaurus–Shantungosaurus clade, based on the new materials recovered in Shandong. Remains of several individuals, including skull bones, limb bones, and vertebrae, were found in Shandong, China. These specimens were classified in the new genus and species Zhuchengosaurus maximus in 2007.[3] However, further study showed that the supposedly distinct features of Zhuchengosaurus were simply a result of different growth stages.