PBDB Taxon

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

Amurosaurus riabinini

Reptilia - Hadrosauridae

Taxonomy

Amurosaurus riabinini was named by Bolotsky and Kurzanov (1991). Its type specimen is AEHM 1/12, a partial skull (left maxilla and dentary), and it is a 3D body fossil. Its type locality is Blagoveschensk, which is in a Maastrichtian crevasse splay claystone/claystone in the Udurchukan Formation of the Russian Federation.

Year	Name and author
1991	Amurosaurus riabinini Bolotsky and Kurzanov
2000	Amurosaurus riabinini Godefroit p. 32
2003	Amurosaurus riabinini Godefroit et al. p. 148
2004	Amurosaurus riabinini Godefroit et al. p. 147
2004	Amurosaurus riabinini Godefroit et al. p. 589
2004	Amurosaurus riabinini Horner et al. p. 441
2006	Amurosaurus riabinini Lund and Gates p. 270
2006	Amurosaurus riabinini Prieto-Márquez et al. p. 936
2007	Amurosaurus riabinini Evans and Reisz p. 387 fig. 9
2007	Amurosaurus riabinini Gates et al. p. 926 fig. 10
2008	Sahaliyania elunchunorum Godefroit et al. p. 49 figs. 2-10
2008	Amurosaurus riabinini Godefroit et al. p. 68
2009	Sahaliyania elunchunorum Markevich et al. p. 118
2010	Amurosaurus riabinini Alifanov and Bolotsky p. 85
2010	Amurosaurus riabinini Evans p. 416
2010	Amurosaurus riabinini Prieto-Marquez p. 847
2010	Amurosaurus riabinini Prieto-Marquez and Salinas p. 835 fig. 20
2010	Sahaliyania elunchunorum Prieto-Marquez and Salinas p. 835 fig. 20
2010	Amurosaurus riabinini Prieto-Márquez p. 5 fig. 2
2010	Sahaliyania elunchunorum Prieto-Márquez p. 5 fig. 2
2010	Amurosaurus riabinini Prieto-Márquez p. 442
2010	Sahaliyania elunchunorum Prieto-Márquez p. 443
2010	Amurosaurus riabinini Prieto-Márquez and Wagner p. 1243 fig. 3
2010	Sahaliyania elunchunorum Prieto-Márquez and Wagner p. 1243 fig. 3
2011	Amurosaurus riabinini Godefroit et al. p. 168
2011	Sahaliyania elunchunorum Godefroit et al. p. 177–178
2011	Amurosaurus riabinini Prieto-Márquez p. 64
2011	Sahaliyania elunchunorum Prieto-Márquez p. 64
2011	Amurosaurus riabinini Prieto-Márquez p. 475
2011	Sahaliyania elunchunorum Prieto-Márquez p. 475
2011	Amurosaurus riabinini Prieto-Márquez p. 789
2011	Amurosaurus riabinini Sullivan et al. p. 405
2011	Sahaliyania elunchunorum Sullivan et al. p. 405
2011	Amurosaurus riabinini Sun et al. p. 125
2011	Sahaliyania elunchunorum Sun et al. p. 125
2012	Amurosaurus riabinini Godefroit et al. p. 532
2012	Sahaliyania elunchunorum Godefroit et al. p. 532
2012	Amurosaurus riabinini Godefroit et al. p. 14
2012	Amurosaurus riabinini Prieto-Marquez et al. p. 11
2012	Sahaliyania elunchunorum Prieto-Marquez et al. p. 18–21
2012	Amurosaurus riabinini Ramírez-Velasco et al. p. 392
2012	Sahaliyania elunchunorum Ramírez-Velasco et al. p. 392
2012	Amurosaurus riabinini Saveliev et al. p. 80
2012	Sahaliyania elunchunorum Xing et al. p. 161
2013	Amurosaurus riabinini Cruzado-Caballero et al.
2013	Sahaliyania elunchunorum Cruzado-Caballero et al.
2014	Amurosaurus riabinini Bolotsky et al. p. 320
2014	Sahaliyania elunchunorum Bolotsky et al. p. 321
2015	Sahaliyania elunchunorum Company et al. p. 78
2015	Amurosaurus riabinini Tan et al. p. 260
2017	Amurosaurus riabinini Cruzado-Caballero and Powell p. 5
2017	Sahaliyania elunchunorum Cruzado-Caballero and Powell p. 5
2018	Amurosaurus riabinini Fondevilla et al. p. 8
2018	Sahaliyania elunchunorum Fondevilla et al. p. 8
2019	Amurosaurus riabinini Takasaki et al. p. 5
2021	Amurosaurus riabinini Holland et al. p. 15
2022	Amurosaurus riabinini Xing et al.

Diagnosis

Reference	Diagnosis
P. Godefroit et al. 2011	Prominent median process between basipterygoid processes; sagittal crest particularly elevated on the caudal part of the parietal and forming a high, triangular and deeply excavated triangular process on the occipital aspect of the skull; squamosals separated from each other by this crest along their whole height; caudal process of postorbital particularly elongated, narrow, and regularly very convex dorsally; prefrontal forming a good half of the width of the floor for supracranial crest; ulna and radius sigmoidal both in lateral and in cranial views.
P. Godefroit et al. 2011 (Sahaliyania elunchunorum)	Lambeosaurine dinosaur characterised by the following autapomorphies: paroccipital processes long, very slender, with a slightly convex dorsal border and a slightly concave ventral border; lateral depressions on the dorsal surface of the frontal better developed than in other lambeosaurines, and not associated with a median doming of the bone; quadratojugal notch displaced ventrally; middle of the notch located well below the middle of the height of the quadrate; prepubic blade always more expanded dorsally than ventrally. Also differs from Charonosaurus, Olorotitan, Corythosaurus, and Parasaurolophus by the important ventral deflection of the rostral part of its dentary, which forms an angle of about 30 with the long axis of caudal part of the bone; differs from Amurosaurus by the symmetrical alar process on its basisphenoid, its frontals wider than long and by its well-developed maxillary shelf; differs from Charonosaurus and Parasaurolophus by the short rostral platform of its frontal; differs from Olorotitan by the rounded rostral process of its jugal, by the straight ventral margin of its maxilla, and by the longer preacetabular process of its ilium (ratio ilium length / preacetabular length = 2. 1) ; differs from Tsintaosaurus by the presence of a rostral platform on its frontal and by the median ramus of its squamosal lower than its paroccipital process.

Measurements

No measurements are available

Time interval	Ma	Country or state	Original ID and collection number
Maastrichtian	72.1 - 66.0	China (Heilongjiang)	Sahaliyania elunchunorum (79034)
Late/Upper Maastrichtian	70.6 - 66.0	Russian Federation (Amur)	Hadrosauridae indet. (type locality: 47029)