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Hypacrosaurus stebingeri

Reptilia - Hadrosauridae

Taxonomy
Hypacrosaurus stebingeri was named by Horner and Currie (1994). Its type specimen is MOR 549, a skull, and it is a 3D body fossil. Its type locality is Badger Creek, MOR TM-065/065S, which is in a Campanian terrestrial mudstone in the Two Medicine Formation of Montana.

Synonymy list
YearName and author
1994Hypacrosaurus stebingeri Horner and Currie p. 333
1996Hypacrosaurus stebingeri Molnar p. 650
1997Hypacrosaurus stebingeri Coy p. 168
2001Hypacrosaurus stebingeri Eberth et al. p. 57
2001Hypacrosaurus stebingeri Horner et al. p. 9
2001Hypacrosaurus stebingeri Trexler p. 303
2004Hypacrosaurus stebingeri Horner et al. p. 441
2006Hypacrosaurus stebingeri Lund and Gates p. 272
2006Hypacrosaurus stebingeri Prieto-Márques et al. p. 937
2007Hypacrosaurus stebingeri Evans and Reisz p. 385
2007Hypacrosaurus stebingeri Gates et al. p. 919
2008Hypacrosaurus stebingeri Cooper et al.
2009Hypacrosaurus stebingeri Evans et al. p. 1316
2009Hypacrosaurus stebingeri Gates and Farke p. 1162
2009Hypacrosaurus stebingeri Guenther p. 1428
2009Hypacrosaurus stebingeri Horner et al. p. 743
2010Hypacrosaurus stebingeri Miyashita et al. p. 88
2010Hypacrosaurus stebingeri Prieto-Marquez p. 845
2010Hypacrosaurus stebingeri Prieto-Marquez and Salinas p. 835 fig. 20
2010Hypacrosaurus stebingeri Prieto-Márquez p. 5 fig. 2
2010Hypacrosaurus stebingeri Prieto-Márquez and Wagner p. 1243 fig. 3
2010Hypacrosaurus stebingeri Reisz et al. p. 1664
2011Hypacrosaurus stebingeri Prieto-Márquez p. 62
2011Hypacrosaurus stebingeri Sullivan et al. p. 417
2012Hypacrosaurus stebingeri Prieto-Marquez et al. p. 7
2012Hypacrosaurus stebingeri Ramírez-Velasco et al. p. 392
2013Hypacrosaurus sternbergi Araújo et al. p. 6
2013Hypacrosaurus stebingeri Bailleul et al. p. 1
2013Hypacrosaurus stebingeri Cruzado-Caballero et al.
2014Hypacrosaurus stebingeri Bolotsky et al. p. 323
2014Hypacrosaurus stebingeri Brink et al. p. 248
2014Hypacrosaurus stebingeri Gates et al. p. 159
2015Hypacrosaurus stebingeri Tan et al. p. 249
2016Hypacrosaurus stebingeri Fanti et al. p. 270
2016Hypacrosaurus stebingeri Prieto-Márquez and Gutarra p. 144
2017Hypacrosaurus stebingeri Cruzado-Caballero and Powell p. 4

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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
genusHypacrosaurus
speciesstebingeri

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
K. S. Brink et al. 2014Lambeosaurine hadrosaurid dinosaur characterized by a cranial crest comprised predominantly of the caudolateral process of the premaxilla in lateral view that is elongate and lingulate in shape. The caudolateral process contribution to the crest is longer than tall, with a slightly convex dorsal margin. It differs from Corythosaurus in that the caudolateral process of premaxilla is not divided into distinct cranial and rostral lobes. It differs from Lambeosaurus in the following features: sloping facial profile with apex of crest above orbit; caudal margin of crest formed predominantly by nasal; nasal with rostral bifurcation; caudodorsal process of premaxilla without accessory rostroventral flange overlapping the lateral surface of nasal in rostral region of crest; incomplete enclosure of ophthalmic canal. It differs from H. altispinus in the following features: external nares elongate; postorbital bifurcate; jugal with rounded ventral flange; nasal bifurcation is more pronounced in juveniles; caudolateral process of premaxilla lingulate, forming majority of cranial crest in lateral view in adult specimens.