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Gryposaurus monumentensis

Reptilia - Hadrosauridae

Taxonomy
Gryposaurus monumentensis was named by Gates and Sampson (2007). Its type specimen is RAM 6797, a skull, and it is not a trace fossil. Its type locality is Gryposaurus monumentensis type, GS-ENM (PROXY), which is in a Campanian channel lag horizon in the Kaiparowits Formation of Utah.

Synonymy list
YearName and author
2007Gryposaurus monumentensis Gates and Sampson p. 353 figs. 1, 3-15
2010Gryposaurus monumentensis Prieto-Marquez p. 853
2010Gryposaurus monumentensis Prieto-Marquez and Salinas p. 835 fig. 20
2010Gryposaurus monumentensis Prieto-Márquez p. 5 fig. 2
2010Gryposaurus monumentensis Prieto-Márquez and Wagner p. 1243 fig. 3
2011Gryposaurus monumentensis Gates et al. p. 800
2012Gryposaurus monumentensis Godefroit et al. p. 4
2012Gryposaurus monumentensis Prieto-Márquez p. 512
2012Gryposaurus monumentensis Ramírez-Velasco et al. p. 392
2013Gryposaurus monumentensis Prieto-Marquez
2014Gryposaurus monumentensis Farke and Herrero p. 191
2014Gryposaurus monumentensis Gates et al. p. 156
2016Gryposaurus monumentensis Lehman et al. p. 345
2016Gryposaurus monumentensis Prieto-Márquez and Gutarra p. 142
2017Gryposaurus monumentensis Cruzado-Caballero and Powell p. 11

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
Eosuchia()
Neodiapsida
RankNameAuthor
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Neornithischia()
Ornithopoda()
Iguanodontia()
Dryomorpha
Ankylopollexia
Styracosterna
Hadrosauriformes
Hadrosauroidea()
familyHadrosauridae
subfamilyHadrosaurinaeLambe 1918
tribeKritosauriniLapparent and Lavocat 1955
genusGryposaurus
speciesmonumentensis

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
A. Prieto-Marquez 2010Hadrosaurid dinosaur of the genus Gryposaurus characterized by the following autapomorphies: predentary and premaxillary oral margins with pronged denticles; and surangular with distinct dorsal process on its medial ridge. It differs from Gryposaurus notabilis in possessing an anteroposteriorly narrower infratemporal fenestra (approximately half the orbital width), with subparallel anterior and posterior margins, and a dorsoventrally more elongated mandibular foramen (diagnosis modified from Gates and Sampson, 2007).