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Chasmosaurus belli

Reptilia - Ceratopsidae

Synonyms
Synonymy list
YearName and author
1902Monoclonius canadensis Lambe p. 63
1902Monoclonius belli Lambe pp. 66-67 figs. 20; Pl. 20: 1, 2
1905Monoclonius canadensis Lambe p. 3
1905Monoclonius belli Lambe p. 23
1905Monoclonius canadensis Lambe p. 23
1914Ceratops belli Brown p. 378
1914Ceratops canadensis Brown p. 378
1914Protorosaurus belli Brown p. 562
1914Protorosaurus belli Lambe pp. 131-132
1914Monoclonius canadensis Lambe p. 132
1914Chasmosaurus belli Lambe pp. 149-155
1914Ceratops canadensis Lambe p. 154
1914Chasmosaurus belli Lambe p. 294
1915Eoceratops canadensis Lambe p. 1
1915Chasmosaurus belli Lambe p. 12
1915Eoceratops canadensis Lambe p. 117
1916Eoceratops canadensis Lambe p. 194
1916Chasmosaurus belli Lambe p. 196
1923Eoceratops canadensis Gilmore p. 51
1924Chasmosaurus belli Abel p. 712
1925Chasmosaurus belli Parks p. 5
1925Eoceratops canadensis Parks p. 5
1927Ceratops belli Huene p. 261
1927Ceratops caudensis Huene p. 261
1930Eoceratops canadensis Russell p. 149
1933Chasmosaurus kaiseni Brown
1933Eoceratops canadensis Lull p. 91
1933Chasmosaurus brevirostris Lull p. 94 figs. Pl. VIIA
1933Chasmosaurus kaiseni Lull p. 94 fig. 38
1934Chasmosaurus belli Russell p. 368
1935Chasmosaurus brevirostris Parks p. 193
1935Chasmosaurus belli Parks p. 194
1935Chasmosaurus belli Russell p. 378
1939Chasmosaurus kaiseni Riabinin p. 25
1940Eoceratops canadensis Sternberg p. 471
1940Chasmosaurus belli Sternberg p. 478
1940Chasmosaurus brevirostris Sternberg p. 478
1942Chasmosaurus belli Wiman p. 239 fig. 2
1946Chasmosaurus kaiseni Gray p. 796
1946Chasmosaurus belli Gray p. 797
1946Chasmosaurus brevirostris Gray p. 797
1949Chasmosaurus brevirostris Lull and Gray p. 493
1949Chasmosaurus belli Lull and Gray p. 495
1949Chasmosaurus kaiseni Sternberg p. 42 fig. 1
1964Chasmosaurus belli Kuhn p. 56
1964Chasmosaurus brevirostris Kuhn p. 56
1964Chasmosaurus kaiseni Kuhn p. 56
1964Eoceratops canadensis Kuhn p. 56
1964Chasmosaurus belli Russell p. 13
1964Chasmosaurus kaiseni Russell p. 13
1964Eoceratops canadensis Russell p. 13
1964Eoceratops canadensis Tatarinov p. 583
1964Chasmosaurus belli Tatarinov p. 585
1966Chasmosaurus belli Russell p. 17
1966Chasmosaurus kaiseni Russell p. 21
1966Chasmosaurus brevirostris Russell p. 30
1970Chasmosaurus belli Swinton p. 259
1980Chasmosaurus billi Drake p. 197
1981Chasmosaurus kaiseni Tyson p. 1244
1984Chasmosaurus belli Russell p. 33
1985Chasmosaurus kaiseni Sloan p. 265
1986Chasmosaurus brevirostris Tokaryk p. 195
1989Chasmosaurus belli Lehman p. 139
1989Chasmosaurus canadensis Lehman p. 139
1990Chasmosaurus belli Dodson and Currie p. 612
1990Chasmosaurus canadensis Dodson and Currie p. 612
1990Chasmosaurus canadensis Lehman p. 224
1990Chasmosaurus belli Lehman p. 225
1993Chasmosaurus belli Forster and Sereno p. 14
1995Chasmosaurus belli Godfrey and Holmes p. 728
2001Chasmosaurus belli Eberth et al. p. 59
2004Chasmosaurus belli Dodson et al. p. 495
2005Chasmosaurus belli Currie p. 4
2005Chasmosaurus belli Diem and Archibald p. 251
2005Chasmosaurus belli Ryan and Evans p. 325
2006Chasmosaurus belli Campione and Holmes p. 1014
2006Chasmosaurus belli Lucas et al. p. 368
2007Chasmosaurus belli Farke p. 249
2007Chasmosaurus belli Lehman p. 259
2007Chasmosaurus belli Ryan p. 390
2008Chasmosaurus belli Currie et al. p. 84
2008Chasmosaurus belli Hunt and Lehman p. 1132
2008Chasmosaurus belli Longrich p. 994
2009Chasmosaurus belli Hieronymus et al. p. 1377
2010Chasmosaurus belli Christiansen and Tschopp p. 168
2010Chasmosaurus belli Longrich p. 683
2010Chasmosaurus belli Ryan et al. p. 185
2011Chasmosaurus belli Farke p. 7
2011Chasmosaurus belli Farke et al. p. 693
2011Chasmosaurus belli Maidment and Barrett p. 4
2014Chasmosaurus belli Longrich p. 299
2016Chasmosaurus belli Lund et al. p. 6

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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()
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
genusChasmosaurus
speciesbelli()

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
N. R. Longrich 2010Chasmosaurus exhibiting the following combination of characters: (1) lateral ramus of parietal posterior bar straight in dorsal view; (2) lateral rami of parietal posterior bar strongly divergent, separated by an angle of 140°–180°; (3) three or four pairs of parietal epoccipitals; (4) medial parietal epoccipitals coalesced and forming a low, ridge-like structure; (5) lateral pair of parietal epoccipitals large and subtriangular; (6) orbital horns reduced, their length being no more than 100% basal diameter.
S. C. R. Maidment and P. M. Barrett 2011Taxon displaying the combination of characters unique to the genus Chasmosaurus along with the following features: (1) parietal posterior bar bearing no median emargination and is nearly straight so that it forms a ‘T’ shape with the parietal median bar; (2) lateral pair of epiparietals large and triangular; others, when preserved, are smaller (after Godfrey & Holmes 1995). Both characters are autapomorphic for C. belli within Chasmosaurus.