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

Agujaceratops (Aguja horned face)

Reptilia - Ceratopsidae

Synonymy list
YearName and author
2006Agujaceratops Lucas et al. p. 370
2010Agujaceratops Longrich p. 692 fig. 10
2010Agujaceratops Ryan et al. p. 185
2011Agujaceratops Maidment and Barrett p. 2
2014Agujaceratops Longrich p. 303 fig. 8

Is something missing? Join the Paleobiology Database and enter the data

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()
RankNameAuthor
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Neornithischia()
Clypeodonta
Cerapoda
Marginocephalia
Ceratopsia()
infraorderNeoceratopsia
Coronosauria
familyCeratopsidae
subfamilyChasmosaurinae
genusAgujaceratops

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
S. G. Lucas et al. 2006Diagnosis—Agujaceratops is a large ceratopsid most similar to Chasmosaurus and Pentaceratops. Agujaceratops differs from Chasmosaurus in having a relatively deep facial skeleton (at the orbit, though this varies somewhat ontogenetically), relatively short and broad squamosal (length/width < 2), more than 6 relatively large epoccipitals on the squamosal (though some Chasmosaurus have as many as 9), lacking a parietal median bar that is deep or deeper dorsoventrally than wide with a rectangular/subrectangular cross section and flat lateral sides, lacking a jugal flange that contacts the squamosal below the infratemporal fenestra, having a maxilla without a lateral horizontal shelf and a premaxilla without a posterodorsal extension, having relatively long supraorbital horncores and a relatively deep embayment of the posterior median parietal. Agujaceratops differs from Pentaceratops in being smaller, having a premaxilla septal flange along the entire anterior edge of the naris (as in Chasmosaurus), having a nasal horncore that is not centered above the external naris, having a relatively broader and shorter squamosal and a relatively wide frill with a convex lateral margin, that is widest posteriorly (as in Chasmosaurus), having supraorbital horncores that are curved posteriorly (not anteriorly), a posterior border of the parietal that is flattened and plate-like (rather than square and bar like) and a marked but shallower embayment of the posterior median parietal.
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yeso
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: terrestrialsubo
Locomotion: actively mobileo
Life habit: ground dwellingsubo
Diet: herbivoresubo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2005-09-15 11:08:09
Modified: 2005-09-15 13:08:09
Source: subo = suborder, o = order
References: Kiessling 2004, Norman and Weishampel 1991, Marsh 1875

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

Collections (7 total)


Time interval Ma Country or state Original ID and collection number
Judithian83.5 - 70.6USA (Texas) Chasmosaurus mariscalensis (48941 52462 52463 52464)
Late/Upper Campanian83.5 - 70.6USA (Texas) Chasmosaurus mariscalensis (22709 25073)
Late/Upper Campanian - Early/Lower Maastrichtian83.5 - 66.0USA (Texas) Agujaceratops sp. (94373)