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Yunnanosaurus huangi

Reptilia

Taxonomy
Yunnanosaurus huangi was named by Young (1940). Its type specimen is IVPP AS V.20 (NGMJ 004546), a skeleton, and it is a 3D body fossil. Its type locality is Huangchiatien, Lufeng, which is in a Sinemurian terrestrial horizon in the Lufeng Formation of China.

It was synonymized subjectively with Lufengosaurus huenei by Rozhdestvensky (1965) and Galton and Cluver (1976).

Synonymy list
YearName and author
1940Yunnanosaurus huangi Young
1941Yunnanosaurus huangi Bien p. 174
1942Yunnanosaurus huangi Young p. 64 figs. 1-17
1944Yunnanosaurus huangi Young p. 4
1946Yunnanosaurus huangi Young p. 5
1947Yunnanosaurus huangi Young p. 25
1951Yunnanosaurus huangi Young p. 57
1961Yunnanosaurus huangi Hu pp. 279-280
1965Yunnanosaurus huangi Simmons p. 63
1967Yunnanosaurus huangi Charig p. 712
1970Yunnanosaurus huangi Steel p. 52
1992Yunnanosaurus huangi Dong p. 163
2003Yunnanosaurus huangi Yates p. 318
2004Yunnanosaurus huangi Galton and Upchurch p. 236
2007Yunnanosaurus huangi Barrett et al. p. 321
2007Yunnanosaurus huangi Galton p. 518
2007Yunnanosaurus huangi Lü et al. p. 1
2007Yunnanosaurus huangi Upchurch et al. p. 76
2009Yunnanosaurus huangi Xing et al. p. 17
2010Yunnanosaurus huangi Langer et al. p. 90
2011Yunnanosaurus huangi Apaldetti et al. p. 4
2012Yunnanosaurus huangi Barrett and Xu p. 156
2016Yunnanosaurus huangi Xing et al. p. 730
2020Yunnanosaurus huangi Moro et al.
2020Yunnanosaurus huangi Peyre de Fabrègues et al. p. 4
2021Yunnanosaurus huangi Peyre de Fabrègues et al. p. 323
2022Yunnanosaurus huangi Yao et al. p. 4

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
RankNameAuthor
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Saurischia()
—Eusaurischia
—Sauropodomorpha(Huene 1932)
—Massopoda
—Sauropodiformes
genusYunnanosaurus
specieshuangi

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.

†Yunnanosaurus huangi Young 1940
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Diagnosis
ReferenceDiagnosis
C.-C. Young 1951Size smaller than Lufengosaurus huenei. Skull features, see the diagnosis given for the genus. Teeth rounded, slender and sharply pointed. They are spaciously arranged about 15 in upper and 15 in the lower jaw. Most of the teeth are smooth, only fine serrations may be
occasionally observed along their posterior edges.
P. M. Barrett et al. 2007(cranial features only): Small external naris (∼10% of maximum skull length); robust, rostrocaudally expanded nasal process of the premaxilla; presence of a ventral projection from the caudal margin of ascending maxillary process; lack of nutritive foramina on lateral surface of maxilla; shallow, subcircular fossa present on lateral surface of ventral lachrymal process; presence of a midline boss near to the rostral end of the frontals; prominent midline boss present on the parietals; rostrolateral process of the parietal rostrocaudally expanded relative to the width of the caudolateral process; maxillary teeth are mesiodistally narrow and lack denticles.