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Tuojiangosaurus multispinus

Reptilia

Taxonomy
Tuojiangosaurus multispinus was named by Dong et al. (1977). Its type specimen is CV 209, a skeleton, and it is a 3D body fossil. Its type locality is Wujiaba Dam Quarry, Zigong, which is in a Bathonian/Callovian terrestrial horizon in the Shaximiao Formation of China. It is the type species of Tuojiangosaurus. It was considered monophyletic by Maidment and Wei (2006).

It was recombined as Tuojangosaurus multispinus by Olshevsky and Ford (1993).

Synonymy list
YearName and author
1977Tuojiangosaurus multispinus Anonymous p. 37
1977Tuojiangosaurus multispinus Dong et al.
1978Tuojiangosaurus multispinus Dong et al.
1981Tuojiangosaurus multispinus Anonymous
1981Tuojiangosaurus multispinus Olshevsky p. 36
1983Tuojiangosaurus multispinus Dong et al. p. 105 figs. Pl. 35-39
1984Tuojiangosaurus multispinus He p. 75
1985Tuojiangosaurus multispinus Zhao p. 289
1990Tuojiangosaurus multispinus Dong p. 260
1990Tuojiangosaurus multispinus Galton
1992Tuojiangosaurus multispinus Dong pp. 82-83
1993Tuojangosaurus multispinus Olshevsky and Ford
2001Tuojiangosaurus multispinus Carpenter et al. p. 73
2004Tuojiangosaurus multispinus Galton and Upchurch p. 345
2005Tuojiangosaurus multispinus Peng et al.
2006Tuojiangosaurus multispinus Jiang p. 11
2006Tuojiangosaurus multispinus Maidment and Wei p. 622
2007Tuojiangosaurus multispinus Wings et al. p. 116
2008Tuojiangosaurus multispinus Maidment et al. p. 377
2010Tuojiangosaurus multispinus Maidment p. 205
2011Tuojangosaurus multispinus Li et al. p. 24
2014Tuojiangosaurus multispinus Ulansky p. 8
2016Tuojiangosaurus multispinus Galton and Carpenter p. 191
2018Tuojiangosaurus multispinus Hao et al. p. 431
2019Tuojiangosaurus multispinus Costa and Mateus 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
RankNameAuthor
subclassEureptilia()
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Ornithischia()
—Genasauria
—Thyreophora()
—Stegosauria()
genusTuojiangosaurus
speciesmultispinus

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.

†Tuojiangosaurus multispinus Dong et al. 1977
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Diagnosis
ReferenceDiagnosis
Z. Dong et al. 1983A large stegosaur with a skull typical for the subfamily. Zygomatic arch is not developed, two to three supraorbitals are present with coarse tubercular nodes ornamenting their surfaces. Numerous tightly packed mandibular and maxillary teeth are present with maxillary teeth being superimposed, or tiled. Four sacral vertebrae are present, pelvic girdle is spaceously broad, sacral ribs and diapophyses are not completely fused, and as such, the dorsal spines are not completely fused. Armor is represented in a variety of morphologies: in the cervical region the armor is circular, in the dorsal regions it is triangular, whereas in the sacral and caudal regions it is conically compressed. A conspicuous fourth trochanter is present on the femur, the femur-humerus ratio is 1.57, and the ventral scapula is not strongly expanded.
G. Peng et al. 2005Large-sized stegosaur about 7 m of body length. It is recognized by low and elongate skull; undeveloped jugal; 2~3 pairs of supraorbitals with bulky dorsal surfaces; upper and lower dentitions densely arranged teeth that overlapped each other; 4 fused sacrals co-ossified with sacral ribs and forming a broad sacrum; sacral foramen not completely enclosed; varied morphology of dermal plates that oval-shaped in neck, elongate triangular in back, and compressed conical-shaped in sacrum and tail; femur with an indistinct fourth trochanter; length of femur about 1.57 times of that of humerus; and scapula with an indistinctly expanded distal end.
S. C. R. Maidment and G. Wei 2006Differs from all other stegosaurs in having frontals that are wider than long and an ilium in which there is a prominent angle leading to a clear separation between the supra-acetabular process and the very well-developed posterior process.
S. C. R. Maidment et al. 2008Differs from all other stegosaurs in having frontals that are wider than long and an ilium in which there is a prominent angle leading to a clear separation between the supra-acetabular process and the very well developed posterior process (Fig. 2F).