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Omeisaurus luoquanensis

Reptilia

Taxonomy
Omeisaurus luoquanensis was named by Li (1988) [Named by Li in this reference.]. Its type specimen is IVPP V.21501, a partial skeleton, and it is a 3D body fossil. Its type locality is Luoquan village, which is in an Oxfordian terrestrial horizon in the Shaximiao Formation of China.

It was considered a nomen dubium by Upchurch et al. (2004).

Synonymy list
YearName and author
1988Omeisaurus luoquanensis Li
1988Omeisaurus luoquanensis Liu p. 94
1992Omeisaurus luoquanensis Dong p. 75
1999Omeisaurus luoquanensis Martin-Rolland p. 299
2011Omeisaurus luoquanensis Jiang et al. p. 193
2011Omeisaurus luoquanensis Li et al. p. 23
2019Omeisaurus luoquanensis Tan et al. p. 113

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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()
Sauropoda()
Gravisauria
Eusauropoda
Mamenchisauridae()
genusOmeisaurus
speciesluoquanensisLi 1988

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.

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Diagnosis
ReferenceDiagnosis
K. Liu 1988Notably similar to O. tianfuensis in size and shape, different from the latter are as follows, in dorsal vertebrae, the laminae exceptionally thin, infrapostzygapophyseal, infradiapophyseal and infrapostzygapophyseal cavities more developed than that of O. tianfuensis; the most anterior caudal spines extremely low and broad being plate-like; humerus remarkably straight with a long and slender shaft and rounded shape in cross section.