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Centrosaurus apertus

Reptilia - Ceratopsidae

Taxonomy
Centrosaurus apertus was named by Lambe (1905). Its type specimen is NMC 971, a skull, and it is a 3D body fossil. Its type locality is Berry Creek south, GSC (NMC), which is in a Campanian terrestrial horizon in the Dinosaur Park Formation of Canada.

It was synonymized subjectively with Monoclonius dawsoni by Brown (1914); it was recombined as Monoclonius apertus by Kuhn (1964).

Synonyms
Synonymy list
YearName and author
1902Monoclonius dawsoni Lambe p. 57 figs. Pl. 16, 19, 20
1904Centrosaurus apertus Lambe
1905Centrosaurus apertus Lambe
1905Monoclonius dawsoni Lambe p. 3
1905Centrosaurus apertus Lambe p. 363
1907Monoclonius dawsoni Hatcher et al. pp. 89-93
1907Centrosaurus apertus Hatcher et al. p. 168
1910Centrosaurus apertus Lambe p. 149
1910Monoclonius dawsoni Lambe p. 149
1911Centrosaurus apertus Lull p. 339
1914Monoclonius dawsoni Brown p. 378
1914Monoclonius flexus Brown p. 551 figs. 1-2, Pl. 38-39
1914Centrosaurus apertus Lambe p. 151
1915Brachyceratops dawsoni Lambe pp. 6-7
1915Centrosaurus apertus Lambe p. 21
1915Brachyceratops dawson Lambe p. 117
1915Centrosaurus apertus Lambe p. 117
1916Centrosaurus apertus Lambe p. 195
1917Monoclonius flexus Brown p. 285
1917Monoclonius cutleri Brown pp. 301-302
1921Centrosaurus apertus Parks p. 53
1924Centrosaurus apertus Abel p. 712
1924Centrosaurus apertus Parks p. 382
1925Brachyceratops dawsoni Parks p. 5
1925Centrosaurus apertus Parks p. 5
1925Monoclonius cutleri Parks p. 5
1925Monoclonius flexus Parks p. 5
1927Centrosaurus apertus Huene p. 261
1927Monoclonius cutleri Huene p. 261
1927Monoclonius dawsoni Huene p. 261
1927Monoclonius flexus Huene p. 261
1930Brachyceratops dawsoni Russell p. 149
1930Centrosaurus apertus Russell p. 149
1930Centrosaurus cutleri Russell p. 149
1930Monoclonius cutleri Russell p. 149
1933Monoclonius dawsoni Lull p. 83
1933Centrosaurus apertus Lull p. 85
1933Centrosaurus flexus Lull p. 86
1933Centrosaurus cutleri Lull pp. 87-88
1935Centrosaurus apertus Parks p. 194
1937Monoclonius cutleri Brown and Schlaikjer
1940Centrosaurus apertus Sternberg p. 468
1940Centrosaurus dawsoni Sternberg p. 468
1940Centrosaurus flexus Sternberg p. 470
1940Centrosaurus longirostris Sternberg p. 473
1946Monoclonius flexus Gray p. 796
1949Monoclonius flexus Lull and Gray p. 495
1963Monoclonius flexus Anonymous p. 356
1964Monoclonius apertus Kuhn p. 57
1964Monoclonius cutleri Kuhn p. 57
1964Monoclonius dawsoni Kuhn p. 57
1964Monoclonius inflexus Kuhn p. 57
1964Monoclonius longirostris Kuhn p. 58
1964Brachyceratops dawsoni Russell p. 13
1964Centrosaurus apertus Russell p. 13
1964Centrosaurus longirostris Russell p. 13
1964Monoclonius cutleri Russell p. 13
1964Monoclonius flexus Tatarinov p. 585
1966Centrosaurus apertus Russell p. 17
1966Centrosaurus longirostris Russell p. 23
1980Centrosaurus apertus Drake p. 197
1981Centrosaurus apertus McIntosh p. 41
1981Centrosaurus flexus Tyson p. 1244
1984Centrosaurus flexus Russell p. 33
1984Centrosaurus longirostris Russell p. 33
1988Centrosaurus flexus Dodson and Currie p. 927
1990Centrosaurus apertus Dodson pp. 234-239
1990Centrosaurus apertus Dodson and Currie p. 611
1997Centrosaurus apertus Vickaryous and Ryan p. 492
2001Centrosaurus apertus Eberth et al. p. 59
2001Centrosaurus apertus Makovicky p. 254 fig. 18.3
2003Centrosaurus apertus Ryan and Russell p. 91A
2004Centrosaurus apertus Chinnery p. 584
2004Centrosaurus apertus Dodson et al. p. 495
2005Centrosaurus apertus Currie p. 4
2005Centrosaurus apertus Ryan and Evans p. 327
2005Centrosaurus apertus Ryan and Russell pp. 1370-1371
2007Centrosaurus apertus Ryan et al. p. 949
2008Centrosaurus apertus Currie et al. p. 93
2008Centrosaurus apertus Longrich p. 994
2009Centrosaurus apertus Hieronymus et al. p. 1372 fig. 1
2010Centrosaurus apertus Longrich p. 682
2010Centrosaurus apertus McDonald and Horner p. 159
2010Centrosaurus apertus Ryan et al. p. 186
2011Centrosaurus apertus Farke p. 7
2011Centrosaurus apertus Farke et al. p. 693
2011Centrosaurus apertus Maidment and Barrett p. 43
2012Centrosaurus apertus Ryan et al. p. 79
2014Centrosaurus apertus Evans et al. p. 206
2015Centrosaurus apertus Tan et al. p. 256
2016Centrosaurus apertus Mallon et al. p. 5

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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
subfamilyCentrosaurinae
genusCentrosaurus
speciesapertus

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
B. Brown 1917 (Monoclonius cutleri)Femur nearly half as long again as tibia; ischium very long and straight with distal end decurved; sternal plates elongate.