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Xiaosaurus dashanpensis

Reptilia -

Taxonomy
Xiaosaurus dashanpensis was named by Dong and Tang (1983). Its type specimen is IVPP V6730A and is a 3D body fossil. Its type locality is Dashanpu Dinosaur Quarry, Xiashaximiao, which is in a Bajocian/Callovian lacustrine sandstone/mudstone in the Xiashaximiao Formation of China. It is the type species of Xiaosaurus.

It was considered a nomen dubium by Sereno (1991); it was considered a nomen dubium by Norman et al. (2004).

Synonymy list
YearName and author
1983Xiaosaurus dashanpensis Dong and Tang
1992Xiaosaurus dashanpensis Dong p. 61
1997Xiaosaurus dashanpensis Dong p. 793
2005Xiaosaurus dashanpensis Barrett et al. p. 831
2008Xiaosaurus dashanpensis Butler et al. p. 12
2010Xiaosaurus dashanpensis Carpenter p. 156
2012Xiaosaurus dashanpensis Zheng et al. p. 208

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
RankNameAuthor
subclassEureptilia()
Romeriida
Diapsida()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
genusXiaosaurus
speciesdashanpensis

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.

Diagnosis
ReferenceDiagnosis
P. M. Barrett et al. 2005A 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.
R. J. Butler et al. 2008A proximally straight humerus that lacks the medial curvature seen in all other basal ornithischians.