Klamelisaurus

Klamelisaurus (meaning "Kelameili Mountains lizard") is a genus of herbivorous sauropod dinosaur from the Middle Jurassic Shishugou Formation of China. The type species is Klamelisaurus gobiensis, which was named by Zhao Xijin in 1993, based on a partial skeleton discovered in 1982 near the abandoned town of Jiangjunmiao. Zhao described Klamelisaurus as the only member of a new subfamily, Klamelisaurinae, among the now-defunct primitive sauropod order Bothrosauropodoidea. Since Zhao's description, Klamelisaurus received limited attention from researchers until Andrew Moore and colleagues redescribed it in 2020.

A relatively large sauropod measuring approximately long, with half of the length being its neck, Klamelisaurus can be distinguished from its relatives by characteristics of the and . Phylogenetic analyses have suggested that Klamelisaurus belonged to the Mamenchisauridae, a group of Middle to Late Jurassic and primarily Chinese sauropods, although its close relatives also include a mamenchisaurid from Thailand. While paleontologist Gregory S. Paul suggested that Bellusaurus, known only from juvenile specimens, was a juvenile Klamelisaurus, this proposal has been rejected based on anatomical evidence, and the fact that Bellusaurus was geologically younger.