Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Huayangosauridae

Osteichthyes - Huayangosauridae

Taxonomy
Huayangosauridae was named by Dong et al. (1982). Its type is Huayangosaurus. It was considered monophyletic by Maidment et al. (2008).

It was assigned to Stegosauria by Ulansky (2014); to Stegosauria by Galton (1990), Carpenter et al. (2001), Blows (2001), Galton and Upchurch (2004), Tumanova and Alifanov (2018); and to Stegosauria by Olshevsky and Ford (1993), Maidment et al. (2008), Fonseca et al. (2024), Sánchez-Fenollosa and Cobos (2025).

Subtaxa
Baiyinosaurus, Bashanosaurus, Gigantspinosaurus, Huayangosaurus (type genus), Isaberrysaura
Entered
by M. Carrano on 2004-01-26; modified by M. Carrano on 2022-09-26

Synonymy list
YearName and author
1982Huayangosauridae Dong et al.
1990Huayangosauridae Galton
1993Huayangosauridae Olshevsky and Ford
2001Huayangosauridae Blows p. 137
2001Huayangosauridae Carpenter et al. p. 73
2004Huayangosauridae Galton and Upchurch p. 344
2008Huayangosauridae Maidment et al. p. 390 fig. 11
2014Huayangosauridae Ulansky p. 4
2018Huayangosauridae Tumanova and Alifanov p. 1771
2024Huayangosauridae Fonseca et al.
2025Huayangosauridae Sánchez-Fenollosa and Cobos p. 175

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
RankNameAuthor
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Ornithischia()
—ParapredentataNorman 2022
—SaphornithischiaMadzia et al. 2001
—PrionodontiaOwen 1874
—Genasauria
—Thyreophora()
superfamilyThyreophoroidea()
—Eurypoda
—Stegosauria()
familyHuayangosauridaeDong et al. 1982
familyHuayangosauridaeDong et al. 1982

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.

Fm. †Huayangosauridae Dong et al. 1982
show all | hide all
G. †Baiyinosaurus Li et al. 2024
hide
†Baiyinosaurus baojiensis Li et al. 2024
G. †Bashanosaurus Hui et al. 2022
hide
†Bashanosaurus primitivus Hui et al. 2022
G. †Gigantspinosaurus Ouyang 1992
hide
G. †Huayangosaurus Dong et al. 1982
hide
†Huayangosaurus taibaii Dong et al. 1982
G. †Isaberrysaura Salgado et al. 2017
hide
†Isaberrysaura mollensis Salgado et al. 2017
Diagnosis
ReferenceDiagnosis
S. C. R. Maidment et al. 2008All stegosaurs more closely related to Huayangosaurus than to Stegosaurus.

Unambiguous synapomorphies:
• Anterior iliac process projects at an angle roughly parallel to the parasagittal plane (autapomorphic reversal)
• Anterior iliac process strongly angled ventrally in lateral view (convergent in clade B stegosaurs and Euoplocephalus)