?Mamenchisaurus Mamenchisaurus
    Brief Introduction:
    length 16-30 metres
    Weight 20-30 tons
    Feeding Habit herbivorous
    Feeding Habit herbivorous
    Distribution ?China and Mongolia
     Categories Saurischia primitive, sauropod foot, lizard-type class, Euhelopus Division

    Interpretation Mamenchisaurus referred dinosaurs found in Mamenxi.

Details Introduction

    Mamenxi dinosaur’s neck was supported by the long and mutually pressed cervical spine so it was very stiff and turned up very slowly. It had very strong neck muscles, which supported the small snake-like head. Mamenxi dinosaur was as long as a tennis court, but its body was very "slim." There were many empty holes in its spine; therefore, compared with its large body, the Mamenxi dinosaur appeared very small. 145 million years ago, dinosaurs lived in a region covered with vast and dense forests, with mahogany and red cedar everywhere. Mamenxi dinosaurs drove through the forest in groups, with their small, nail-like teeth biting leaves, as well as those shots on the top of trees that other dinosaurs were out of reach. Mamenxi dinosaurs walked in four foots, with its ??thin and long tail dragging behind.

Research and Discovery
    Mamenxi dinosaur was now the largest sauropod dinosaur discovered in China; it was named because the model species were found in Mamenxi, Yibin, Sichuan, China. The animal had a length of 22 meters, soma height of nearly 4 meters. It had a particularly long neck, equivalent to half of the body’s length, not only constituted a cervical length of each neck, and the number of cervical vertebrae were also up to 19, which was the most in sauropod.
Species Evolution
    Mamenxi dinosaur had two most famous kinds: one was Sichuan Mamenxi dinosaurce, found in Hechuan County, Sichuan Province and Yongdeng, Gansu Province, the other was building Mamenxi dinosaur, found in Yibin, Sichuan. Mamenxi dinosaur belonged to an intermediate type of in the evolution history of sauropod and was the early specie in dinosaurs’ prosperous period (140 million years ago in Late Jurassic) and all extinct in the late Jurassic.

The Town of Haishi Bay in Honggu District, Lanzhou City, Gansu Province was originally part of the Yongdeng County’s jurisdiction, therefore, dinosaurs that previously excavated were known as the "Yongdeng Dinosaur".