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Chasmosaurinae

Reptilia - Ceratopsidae

Synonyms
Synonymy list
YearName and author
1888Ceratops Marsh
1888Ceratops montanus Marsh p. 477
1888Ceratops Marsh p. 478
1890Ceratops Zittel p. 751
1890Ceratops montanus Zittel p. 751
1895Ceratops Marsh
1896Ceratops Depéret p. 185
1896Ceratops montanus Hatcher p. 113
1896Ceratops Marsh p. 243
1897Ceratops Gadow p. 205
1900Ceratops montanus Walcott p. 23
1902Ceratops Hay p. 500
1902Ceratops montanus Hay p. 500
1902Ceratops Mansel-Pleydell p. lxxxiv
1902Ceratops montanus Mansel-Pleydell p. lxxxv
1906Proceratops montanus Lull p. 144
1907Ceratops Hatcher et al. p. 11
1907Ceratops montanus Hatcher et al. p. 172
1909Ceratops Huene p. 18
1910Ceratops monatus Lull p. 772
1911Ceratops Lambe p. 9
1911Ceratops von Zittel p. 296
1914Ceratops Brown p. 377
1915Ceratops montanus Lambe p. 10
1915Chasmosaurinae Lambe p. 20
1915Ceratops Matthew p. 30
1919Ceratops Gilmore p. 64
1924Ceratops Lull p. 245
1925Ceratops Gregory and Mook p. 5
1927Ceratops Huene p. 259
1927Ceratops montanus Huene p. 261
1928Ceratops Nopcsa p. 185
1930Ceratops monatus Arldt p. 702
1930Ceratops montanus Russell p. 142
1931Ceratops montanus Johnson p. 368
1933Ceratops Lull p. 96
1933Ceratops montanus Lull p. 96
1950Ceratops Huene p. 351
1956Ceratops Romer p. 639
1964Ceratops Kuhn p. 55
1964Ceratops montanus Kuhn p. 55
1964Ceratops montanus Russell p. 10
1964Ceratops Tatarinov p. 585
1964Ceratops montanus Tatarinov p. 585
1966Ceratops Romer p. 371
1970Ceratops Swinton p. 254
1973Ceratops Powell p. 118
1979Ceratops Laub p. 4
1979Ceratops montanus Laub p. 4
1986Ceratops Ostrom and Wellnhofer p. 116
1989Chasmosaurinae Lehman p. 138
1990Chasmosaurinae Dodson and Currie p. 612
1990Chasmosaurinae Lehman p. 212
1995Chasmosaurinae Godfrey and Holmes p. 727
1997Chasmosaurinae Dodson p. 12
1997Chasmosaurinae Sereno p. 443
2001Chasmosaurinae Eberth et al. p. 59
2001Ceratops montanus Horner et al. p. 10
2004Chasmosaurinae Dodson et al. p. 495
2004Chasmosaurinae Farke p. 5
2005Chasmosaurinae Ryan and Evans pp. 323-324
2005Chasmosaurinae Ryan and Russell p. 1381 fig. 10
2007Chasmosaurinae Ryan p. 391 fig. 12
2007Chasmosaurinae Wu et al. p. 1261 fig. 14
2010Chasmosaurinae Longrich p. 692 fig. 10
2010Chasmosaurinae Xu et al. p. 1634 fig. 3
2011Chasmosaurinae Farke et al. p. 699
2011Chasmosaurinae Maidment and Barrett p. 4
2013Chasmosaurinae Longrich
2014Chasmosaurinae Longrich p. 303 fig. 8
2014Chasmosaurinae Mallon et al.
2015Chasmosaurinae Brown and Henderson

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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()
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
subfamilyChasmosaurinae

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. C. R. Maidment and P. M. Barrett 2011Modified from Lehman (1989): large ceratopsian dinosaurs with long, low facial region (preorbital length/height ratio = 1.4 to 3.0); inter-premaxillary fossae present; premaxilla and predentary with horizontal or poorly developed lateral cutting flange; nasal horn core, if present, small and formed in part by a separate ossification (epinasal); postfrontal foramen present; frontoparietal fontanelle walled mostly by the postorbital bones; frontal bones reduced; prefrontal bones small; cranial frill long (0.94 to 1.70 basal length of skull, except in Triceratops); triangular squamosal bones (length/height ratio = 2.0 to 3.5); prominent longitudinal channel in ventral surface of sacrum; triangular acromial process of the scapula arises about half way along the scapula blade; deep triceps fossa on the caudolateral deltopectoral crest of the humerus; foramen on the caudomedial humerus located dorsal to the apex of the deltopectoral crest; strongly curved ischium.