|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Xiaosaurus (small lizard)
It was considered a nomen dubium by Sereno (1991); it was considered a nomen dubium by Norman et al. (2004).
It was assigned to Hypsilophodontidae by Dong and Tang (1983) and Dong (1992); to Fabrosauridae by Peng (1992) and Dong (1997); and to Ornithischia by Barrett et al. (2005).
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|P. M. Barrett et al. 2005||A small ornithischian dinosaur that possesses a single autapomorphy: possession of a proximally straight humerus that lacks the medial curvature seen in all other basal ornithischians.|