In 2001, another specimen (ZDM0126) was described and referred to "M. hochuanensis". It was nearly complete and mostly articulated. Found in 1995 at a construction site in Huidong New District, Zigong City, Sichuan Province. This specimen also preserved a skull, pectoral girdle and forelimb material, all of which were missing from the holotype. Four fused tail vertebra from the tip of the tail have expanded neural arches and taller neural spines. It's thought that these could be a weapon, such as a tail club, or a sensory organ. Other Chinese sauropods, "Shunosaurus" and "Omeisaurus", are also known to have had ’tail clubs’, but they differ in shape to that of "M. hochuanensis". Phylogenetic analyses have cast doubt on the referral of this specimen to "M. hochuanensis."