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Cimoliosaurus snowii

Reptilia - Plesiosauria - Elasmosauridae

Taxonomy
Cimoliosaurus snowii was named by Williston (1890). Its type specimen is KUVP 1301, a skull (a skull and 28 cervical vertebrae), and it is a 3D body fossil. Its type locality is Hell Creek, which is in a Santonian marine horizon in the Niobrara Formation of Kansas. It is the type species of Styxosaurus.

It was recombined as Cimoliasaurus snowii by Williston (1890), Hay (1902) and Williston (1903); it was recombined as Elasmosaurus snowii by Williston (1906) and Hay (1930); it was considered a nomen vanum by Welles (1962); it was recombined as Styxosaurus snowii by Welles (1943), Welles (1949), Carpenter (1999), Storrs (1999), O'Keefe (2001) and O'Gorman (2019).

Synonyms
Synonymy list
YearName and author
1890Cimoliasaurus snowii Williston
1890Cimoliosaurus snowii Williston p. 178
1902Cimoliasaurus snowii Hay p. 459
1903Cimoliasaurus snowii Williston p. 7
1906Elasmosaurus snowii Williston p. 229 figs. 2-3
1930Elasmosaurus snowii Hay p. 118
1943Styxosaurus snowii Welles
1949Styxosaurus snowii Welles
1949Alzadasaurus pembertoni Welles and Bump p. 524 figs. 3-5
1962Alzadasaurus pembertoni Welles pp. 3 & 66 fig. 15
1999Styxosaurus snowii Carpenter
1999Styxosaurus snowii Storrs p. 7
2001Styxosaurus snowii O'Keefe p. 15
2019Styxosaurus snowii O'Gorman

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
RankNameAuthor
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
suborderSauropterygia
orderPlesiosauriade Blainville 1835
superfamilyPlesiosauroideaWelles 1943
familyElasmosauridaeCope 1869
genusCimoliosaurusLeidy 1851
speciessnowii

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.

Cimoliosaurus snowii Williston 1890
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Diagnosis
No diagnoses are available