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Arrhinoceratops brachyops

Reptilia - Ceratopsidae

Taxonomy
Arrhinoceratops brachyops was named by Parks (1925). Its type specimen is ROM 796, a skull, and it is a 3D body fossil. Its type locality is Neill's Ranch, Red Deer River (125 ft level) [ROM], which is in a Campanian/Maastrichtian terrestrial sandstone in the Horseshoe Canyon Formation of Canada.

Synonymy list
YearName and author
1925Arrhinoceratops brachyops Parks pp. 5-7
1927Arrhinoceratops brachyops Huene p. 261
1930Arrhinoceratops brachyops Hay p. 221
1930Arrhinoceratops brachyops Russell p. 151
1933Arrhinoceratops brachyops Lull p. 106
1933Arrhinoceratops brachyops Russell p. 129
1935Arrhinoceratops brachyops Parks p. 194
1946Arrhinoceratops brachyops Gray p. 797
1949Arrhinoceratops brachyops Lull and Gray p. 495
1949Arrhinoceratops brachyops Sternberg p. 42 fig. 1
1964Arrhinoceratops brachyops Kuhn p. 55
1964Arrhinoceratops brachyops Russell p. 15
1964Arrhinoceratops brachyops Tatarinov p. 585
1966Arrhinoceratops brachyops Russell p. 29
1967Arrhinoceratops brachyops Russell and Chamney p. 11
1976Arrhinoceratops brachyops Lawson p. 163
1981Arrhinoceratops brachyops Tyson p. 1245
1986Arrhinoceratops brachyops Tokaryk p. 195
1990Arrhinoceratops brachyops Dodson and Currie p. 612
1990Arrhinoceratops brachyops Lehman p. 226
1996Arrhinoceratops brachyops Lehman p. 498
1997Arrhinoceratops brachyops Eberth p. 201
2000Arrhinoceratops brachyops Currie p. 277
2004Arrhinoceratops brachyops Dodson et al. p. 495
2005Arrhinoceratops brachyops Diem and Archibald p. 251
2007Arrhinoceratops brachyops Farke p. 249
2008Arrhinoceratops brachyops Hunt and Lehman p. 1134
2010Arrhinoceratops brachyops Longrich p. 692 fig. 10
2013Arrhinoceratops brachyops Longrich p. 57
2014Arrhinoceratops brachyops Currie and Koppelhus p. 1034
2014Arrhinoceratops brachyops Longrich p. 301
2014Arrhinoceratops brachyops Mallon et al.
2022Arrhinoceratops brachyops Mallon et al. p. 161

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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()
RankNameAuthor
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Ornithischia()
—Genasauria
—Cerapoda
—Marginocephalia
—Ceratopsia()
infraorderNeoceratopsia
—Coronosauria
superfamilyCeratopsoidea
familyCeratopsidae
subfamilyChasmosaurinae
genusArrhinoceratops
speciesbrachyops

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
H. Tyson 1981Brow horn cores large. directed anterolaterally; nasal horn core short but massive, posterior edge merging smoothly with dorsal profile of face, apex directed anterodorsally; face relatively short; rostral small, premaxillary septum with shallow depression and two posterior flanges that invade external narial opening; epijugal large, directed ventrolaterally; lateral temporal fenestra subtriangular; antorbital fenestra reduced, if present; squamosal long, tapering, reaching posterior border of frill; frill short but broad, with oval parietal fenestrae of moderate size.
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: Marsh 1875, Norman and Weishampel 1991

Age range: Early/Lower Maastrichtian or 70.60000 to 66.00000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Campanian - Early/Lower Maastrichtian83.5 - 66.0Canada (Alberta) Arrhinoceratops brachyops (type locality: 67612)
Early/Lower Maastrichtian70.6 - 66.0Canada (Alberta) Arrhinoceratops brachyops (156799)