The Zigongosaurus got its name from where it was found, like most dinosaurs. The first finding was in Shaximiao Formation of Ziging, Sichuan, China. There have only been fragmentary remains found. This dinosaur was very similar to the Omeisaurus which also is in the same dinosaur group. Some are saying that the Zigongosaurus is actually a Mamenchisaurus because neural spines of the vertebrae of both dinosaurs have a unique distinctive weak bifurcation, or splitting. The Omeisaurus simply did not. Due to this information there is a great chance that this dinosaur may have this identity problem. It was estimated at 60feet in length and 25feet in height, and probably moved in herds as a herbivore.