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Parasaurolophus cyrtocristatus

Reptilia - Hadrosauridae

Taxonomy
Parasaurolophus cyrtocristatus was named by Ostrom (1961). Its type specimen is FMNH P27393, a partial skeleton (nearly complete skeleton and fragmentary skull), and it is a 3D body fossil. Its type locality is Coal Creek [FMNH], which is in a Campanian terrestrial horizon in the Fruitland Formation of New Mexico.

Synonymy list
YearName and author
1961Parasaurolophus cyrtocristatus Ostrom p. 575 fig. 1a
1963Parasaurolophus cyrtocristatus Anonymous p. 340
1963Parasaurolophus cyrtocristatus Nelson p. 2
1963Parasaurolophus cyrtocristatus Ostrom p. 144 figs. 83-94
1964Parasaurolophus cyrtocristatus Kuhn p. 25
1970Parasaurolophus cyrtocristatus Swinton p. 225
1973Parasaurolophus cyrtocristatus Powell p. 118
1980Parasaurolophus cyrtocristatus Wolberg p. 34
1981Parasaurolophus cyrtocristatus Lehman p. 204
1983Parasaurolophus cyrtocristatus Weishampel and Weishampel p. 44
1989Parasaurolophus cyrtocristatus Frances and Sanz p. 141
1990Parasaurolophus cyrtocristatus Weishampel and Horner p. 557
1990Parasaurolophus cyrtocristatus Wolberg and Bellis p. 37
1992Parasaurolophus cyrtocristatus Hunt and Lucas p. 228
1997Parasaurolophus cyrtocristatus Ryan p. 257
1998Parasaurolophus cyrtocristatus Godefroit et al. p. 38
1999Parasaurolophus cyrtocristatus Sullivan and Williamson p. 23
2000Parasaurolophus cyrtocristatus Williamson p. 194
2003Parasaurolophus cyrtocristatus Godefroit et al. p. 147
2003Parasaurolophus cyrtocristatus Hunt and Lucas p. 381
2003Parasaurolophus cyrtocristatus Sullivan and Lucas p. 102A
2004Parasaurolophus cyrtocristatus Gates p. 63A
2004Parasaurolophus cyrtocristatus Horner et al. p. 442
2005Parasaurolophus cyrtocristatus Sullivan et al. p. 399
2005Parasaurolophus cyrtocristatus Titus et al. p. 122
2006Parasaurolophus cyrtocristatus Lund and Gates p. 274
2006Parasaurolophus cyrtocristatus Pereda Suberbiola et al. p. 227
2006Parasaurolophus cyrtocristatus Prieto-Márquez et al. p. 934
2007Parasaurolophus cyrtocristatus Evans and Reisz p. 384
2007Parasaurolophus cyrtocristatus Gates et al. p. 921
2008Parasaurolophus cyrtocristatus Godefroit et al. p. 59
2009Parasaurolophus cyrtocristatus Evans et al. p. 1316
2010Parasaurolophus cyrtocristatus Gates et al. p. 164
2010Parasaurolophus cyrtocristatus Prieto-Marquez and Salinas p. 828
2010Parasaurolophus cyrtocristatus Prieto-Márquez p. 5 fig. 2
2010Parasaurolophus cyrtocristatus Prieto-Márquez and Norell p. 36
2010Parasaurolophus cyrtocristatus Prieto-Márquez and Wagner p. 1243 fig. 3
2011Parasaurolophus cyrtocristatus Godefroit et al. p. 175
2011Parasaurolophus cyrtocristatus Prieto-Márquez p. 64
2011Parasaurolophus cyrtocristatus Sullivan et al. p. 406
2011Parasaurolophus cyrtocristatus Sullivan et al. p. 472
2012Parasaurolophus cyrtocristatus Godefroit et al. p. 534
2012Parasaurolophus cyrtocristatus Prieto-Marquez et al. p. 21
2012Parasaurolophus cyrtocristatus Prieto-Márquez p. 524
2012Parasaurolophus cyrtocristatus Ramírez-Velasco et al. p. 392
2012Parasaurolophus cyrtocristatus Saveliev et al. p. 80
2013Parasaurolophus cyrtocristatus Cruzado-Caballero et al.
2013Parasaurolophus cyrtocristatus Farke et al. p. 26
2014Parasaurolophus cyrtocristatus Sullivan and Lucas p. 372
2014Parasaurolophus cyrtocristatus Tsogtbaatar et al. p. 126
2016Parasaurolophus cyrtocristatus Prieto-Márquez and Gutarra p. 141
2017Parasaurolophus cyrtocristatus Cruzado-Caballero and Powell p. 12
2021Parasaurolophus cyrtocristatus Gates et al. pp. 8-9

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
RankNameAuthor
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Ornithischia()
—Genasauria
—Cerapoda
—Ornithopoda()
—Clypeodonta
—Iguanodontia()
—Dryomorpha
—Styracosterna
—Hadrosauriformes
—Hadrosauroidea()
familyHadrosauridae
subfamilyLambeosaurinae
tribeParasaurolophiniGlut 1997
genusParasaurolophus
speciescyrtocristatus

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.

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Diagnosis
ReferenceDiagnosis
T. A. Gates et al. 2021Species with the following unique traits: Long common median chamber present that is equal in dorsoventral breadth to the bounding narial tracts⥉; lateral premaxillary process has a caudoventral extension that projects to nearly the edge of the crest⥉; crest curved sharply posterior to skull (Ostrom, 1961); postcotyloid process of squamosal expands proximoanteriorly and tapers to form a notch of ~49° within the quadrate cotylus⥉; median ramus of squamosals inset at their ventral articulation, forming a pyramidal grotto underlain by the supraoccipitals⥉.
Additionally, this species possesses a unique suite of traits that differentiates from other taxa: Crest with smooth sides (Sullivan & Williamson, 1999); crest height to skull roof length ratio ~1⥉; absence of the external mandibular muscle scar on anterior squamosal⥉; median ramus of squamosals risen to be subvertical⥉.
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yesg
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: gregariouso
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: herbivoresubo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2005-08-25 05:52:29
Modified: 2005-08-25 07:52:29
Source: g = genus, subo = suborder, o = order
References: Benton 1983, Marsh 1875, Peczkis 1995

Age range: Late/Upper Campanian or 83.50000 to 70.60000 Ma

Collections (3 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Campanian83.5 - 70.6USA (New Mexico) Parasaurolophus cyrtocristatus (type locality: 51534 219012)
Late/Upper Campanian83.5 - 70.6USA (Utah) Parasaurolophus sp. (52060)