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Monoclonius crassus

Reptilia - Ceratopsidae

Taxonomy
Monoclonius crassus was named by Cope (1876). Its type specimen is AMNH 3998, a skull, and it is a 3D body fossil. Its type locality is mouth of Dog Creek, which is in a Campanian terrestrial lignite/sandstone in the Judith River Formation of Montana.

It was considered a nomen dubium by Ryan et al. (2010).

Synonyms
Synonymy list
YearName and author
1876Monoclonius crassus Cope
1877Monoclonius crassus Cope p. 316
1886Monoclonius crassus Cope p. 153
1887Monoclonius crassus Seeley p. 85
1889Monoclonius crassus Cope
1890Monoclonius crassus Zittel p. 697
1902Monoclonius crassus Hay p. 499
1902Monoclonius crassus Lambe p. 68
1905Monoclonius crassus Lambe p. 24
1907Monoclonius crassus Hatcher et al. p. 71
1910Monoclonius crassus Lull p. 772
1914Monoclonius crassus Brown pp. 549-551
1915Monoclonius crassus Lambe p. 12
1917Monoclonius crassus Brown p. 285
1921Monoclonius crassus Parks p. 54
1927Monoclonius crassus Huene p. 261
1930Monoclonius crassus Arldt p. 702
1930Monoclonius crassus Russell p. 142
1933Monoclonius crassus Lull p. 82
1934Monoclonius crassus Chakravarti p. 78
1938Monoclonius crassus Sternberg p. 284
1940Monoclonius crassus Sternberg p. 468
1940Monoclonius lowei Sternberg p. 468 figs. 1-2
1964Monoclonius crassus Kuhn p. 57
1964Monoclonius lowei Kuhn p. 57
1964Monoclonius crassus Russell p. 10
1964Monoclonius lowei Russell p. 13
1964Monoclonius crassus Tatarinov p. 583
1966Monoclonius lowei Russell p. 25
1984Monoclonius lowei Russell p. 33
1986Monoclonius crassus Ostrom and Wellnhofer p. 117
1990Monoclonius crassus Dodson pp. 232-233
1990Monoclonius crassus Dodson and Currie p. 611
2004Monoclonius crassus Dodson et al. p. 495

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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()
Neodiapsida
RankNameAuthor
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
genusMonoclonius
speciescrassus

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
No diagnoses are available