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Nipponosaurus sachalinensis

Reptilia - Hadrosauridae

Taxonomy
Nipponosaurus sachalinensis was named by Nagao (1936). Its type specimen is UHR 6590, a partial skeleton, and it is a 3D body fossil. Its type locality is Kawakami Colliery, Sakhalin, which is in a Santonian/Campanian marginal marine mudstone in the Russian Federation. It is the type species of Nipponosaurus.

It was corrected as Nipponosaurus sachaliensis by Nagao (1939) and Ohashi et al. (2015); it was misspelled as Nipponosaurus sachaliensis by Hoffet (1943), Young (1958), Tatarinov (1964), Kuhn (1964), Rozhdestvensky (1977), Maryanska and Osmólska (1981), Weishampel and Weishampel (1983), Weishampel and Horner (1990) and Matsukawa and Obata (1994); it was considered a nomen dubium by Norman and Sues (2000); it was considered a nomen dubium by Godefroit et al. (2008).

Synonymy list
YearName and author
1936Nipponosaurus sachalinensis Nagao p. 187 figs. Pl. 11–22
1938Nipponosaurus sachalinensis Nagao p. 311
1939Nipponosaurus sachaliensis Nagao p. 144
1943Nipponosaurus sachaliensis Hoffet p. 181
1958Nipponosaurus sachalinensis Young p. 109
1964Nipponosaurus sachalinensis Kuhn p. 23
1964Nipponosaurus sachalinensis Tatarinov p. 567
1977Nipponosaurus sachalinensis Rozhdestvensky p. 113
1981Nipponosaurus sachalinensis Maryanska and Osmólska p. 8
1983Nipponosaurus sachalinensis Weishampel and Weishampel p. 44
1990Nipponosaurus sachalinensis Weishampel and Horner p. 558
1994Nipponosaurus sachalinensis Matsukawa and Obata p. 101
2004Nipponosaurus sachalinensis Horner et al. p. 442
2004Nipponosaurus sachalinensis Suzuki et al. p. 146
2006Nipponosaurus sachalinensis Lund and Gates p. 273
2007Nipponosaurus sachalinensis Evans and Reisz p. 384
2008Nipponosaurus sachalinensis Dong p. 6
2011Nipponosaurus sachalinensis Sullivan et al. p. 417
2015Nipponosaurus sachaliensis Ohashi et al. p. 4
2017Nipponosaurus sachalinensis Cruzado-Caballero and Powell p. 12 fig. 13

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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
Diapsida()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
RankNameAuthor
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Neornithischia()
Ornithopoda()
Iguanodontia()
Dryomorpha
Ankylopollexia
Styracosterna
Hadrosauriformes
Hadrosauroidea()
familyHadrosauridae
subfamilyLambeosaurinaeParks 1923
tribeCorythosauriniGlut 1997
genusNipponosaurus
speciessachalinensis

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
T. Nagao 1936Generic and Specific Characters: A small trachodont dinosaur with the skull deep, rather broad, short, and probably steep in front. The cranium squarish in outline in lateral view. The frontal region with a low swelling. The "crest" presumably represented by an incipient dome-like prominence. Vertebrae with large neural canals. Cervical centra strongly opisthocoelous, with very convex anterior articular surfaces. Dorsal centra much reduced in size, moderately opisthocoelous, and almost flat anteriorly, with well developed and high neural spines. Caudal centra slightly amphicoelous with well developed chevrons. Scapula slender and straight. Ischium with a well developed foot-like expansion which is distinctly excavated externally. Femur, tibia and fibula of nearly equal length. Metatarsals rather long and massive.
D. Suzuki et al. 2004Robust coronoid process of the surangular, only slight development of the neural spine of the axis, and strong deflection of the lateral margin of the first phalanx on digit IV.