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Huayangosaurus taibaii

Reptilia -

Taxonomy
Huayangosaurus taibaii was named by Dong et al. (1982). Its type specimen is IVPP V.6728, a skeleton, and it 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 Huayangosaurus.

Synonymy list
YearName and author
1982Huayangosaurus taibaii Dong et al.
1983Huayangosaurus taibaii Zhou p. 15
1990Huayangosaurus taibaii Dong p. 259
1990Huayangosaurus taibaii Galton
1992Huayangosaurus taibaii Dong p. 61
1997Huayangosaurus taibaii Dong p. 793
1997Huayangosaurus taibaii Vickaryous and Ryan p. 490
2001Huayangosaurus taibaii Barrett p. 39 fig. 2.7
2001Huayangosaurus taibaii Carpenter et al. p. 58
2001Huayangosaurus taibaii Vickaryous et al. p. 1773
2004Huayangosaurus taibaii Galton and Upchurch p. 344
2006Huayangosaurus taibaii Maidment et al. p. 945
2007Huayangosaurus taibaii Norman et al. p. 866
2007Huayangosaurus taibaii Wings et al. p. 116
2008Huayangosaurus taibaii Butler et al. p. 7
2008Huayangosaurus taibaii Maidment et al. pp. 376-377
2011Huayangosaurus taibaii Gaete et al. p. 178
2013Huayangosaurus taibaii Pereda-Suberbiola et al. p. 72
2014Huayangosaurus taibaii Ulansky p. 4
2016Huayangosaurus taibaii Galton and Carpenter p. 191
2018Huayangosaurus taibaii Hao et al. p. 431

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

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
S. C. R. Maidment et al. 2008Huayangosaurus possesses the following autapomorphies: possession of an oval depression between the premaxilla and maxilla; presence of a small eminence on the dorsal aspect of the postorbital; anterior dorsal ribs with intercostal flanges and flared distal ends. In addition, Huayangosaurus differs from all known stegosaurs in retaining several plesiomorphic character states, including: presence of premaxillary teeth, possession of ossified tendons and an ilium with a poorly developed supra-acetabular process and posterior process (Fig. 2D).