Xingxiulong Xingxiulong

Xingxiulong (meaning “Xingxiu Bridge dragon”) is a genus of bipedal massopodan sauropodomorph from the Early Jurassic of China. It contains two species; the type species is X. chengi, described by Wang et al. in 2017 from three specimens, two adults and an immature individual, that collectively constitute a mostly complete skeleton. Adults of this species measured 4 – 5 m long and 1 – 1.5 m tall. A second species, X. yueorum, was described by Chen et al. in 2025 based on a partial articulated postcranial skeleton of an adult individual larger than X. chengi.

Phylogenetic analysis suggests that Xingxiulong is most closely related to its contemporary Jingshanosaurus, although an alternative position outside of both the Sauropodiformes and Massospondylidae is also plausible.