PBDB Taxon

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

Nipponosaurus sachalinensis

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), 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), 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).

Year	Name and author
1936	Nipponosaurus sachalinensis Nagao p. 187 figs. Pl. 11–22
1938	Nipponosaurus sachalinensis Nagao p. 311
1939	Nipponosaurus sachaliensis Nagao p. 144
1943	Nipponosaurus sachaliensis Hoffet p. 181
1958	Nipponosaurus sachalinensis Young p. 109
1964	Nipponosaurus sachalinensis Kuhn p. 23
1964	Nipponosaurus sachalinensis Tatarinov p. 567
1977	Nipponosaurus sachalinensis Rozhdestvensky p. 113
1981	Nipponosaurus sachalinensis Maryanska and Osmólska p. 8
1983	Nipponosaurus sachalinensis Weishampel and Weishampel p. 44
1990	Nipponosaurus sachalinensis Weishampel and Horner p. 558
1994	Nipponosaurus sachalinensis Matsukawa and Obata p. 101
2004	Nipponosaurus sachalinensis Horner et al. p. 442
2004	Nipponosaurus sachalinensis Suzuki et al. p. 146
2006	Nipponosaurus sachalinensis Lund and Gates p. 273
2007	Nipponosaurus sachalinensis Evans and Reisz p. 384
2008	Nipponosaurus sachalinensis Dong p. 6
2010	Nipponosaurus sachalinensis Evans p. 404
2010	Nipponosaurus sachalinensis Prieto-Márquez p. 443
2011	Nipponosaurus sachalinensis Sullivan et al. p. 417
2014	Nipponosaurus sachalinensis Xing et al. p. 1824
2015	Nipponosaurus sachaliensis Ohashi et al. p. 4
2017	Nipponosaurus sachalinensis Cruzado-Caballero and Powell p. 12 fig. 13
2020	Nipponosaurus sachalinensis Dalla Vecchia p. 619

Reference	Diagnosis
T. Nagao 1936	Generic 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. 2004	Robust 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.