PBDB Taxon

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Cimoliasaurus

Reptilia - Plesiosauria - Elasmosauridae

Taxonomy

Cimoliasaurus was named by Leidy (1851) [Sepkoski's age data: K Apti K Maes-u Sepkoski's reference number: 2]. Its type is Cimoliosaurus magnus.

It was corrected as Cimoliosaurus by Seeley (1892), White (1940), Delair (1960); it was considered a nomen dubium by Welles (1943).

It was assigned to Streptosauria by Cope (1869); to Plesiosauridae by Lydekker (1889); to Brachaucheniidae by Hay (1930); to Cimoliosauridae by Delair (1960); to Cimoliasauridae by Persson (1963); to Plesiosauria by Williston (1903), Williston (1906), Sepkoski (2002); and to Elasmosauridae by Cope (1871), Cope (1875), Seeley (1892), Hay (1902), Wegner (1914), White (1940), O'Keefe and Street (2009).

Species

Brimosaurus grandis, C. brevior, C. maccoyi, C. magnus, Cimoliosaurus laramiensis, Cimoliosaurus magnus (type species), Cimoliosaurus snowii

Synonyms

Cimoliasaurus maccoyi was named by Etheridge (1904). It is a 3D body fossil. Its type locality is White Cliffs (NSW), which is in an Aptian coastal siltstone in the Wallumbilla Formation of Australia.

It was considered a nomen vanum by Persson (1960), Welles (1962); it was considered a nomen dubium by Kear (2005), Poropat et al. (2023).
Muraenosaurus brevior was named by Lydekker (1889). Its type specimen is six associated immature cervical vertebrae, a set of vertebrae, and it is a 3D body fossil. Its type locality is Weymouth Kimmeridge Clay Formation (non-specific locality data), which is in a Kimmeridgian/Tithonian marine claystone in the Kimmeridge Clay Formation of the United Kingdom.

It was recombined as Cimoliosaurus brevior by Lydekker (1889), Delair (1960); it was considered a nomen dubium by Brown (1981).
Hunosaurus was named by Fritsch (1905) [Sepkoski's age data: K u]. Its type is Hunosaurus fasseli.

It was synonymized subjectively with Cimoliasaurus by Bayer (1914), Bayer (1916).

It was assigned to Squamata by Fritsch (1905); and to Plesiosauria by Sepkoski (2002).
Iserosaurus was named by Fritsch (1905) [Sepkoski's age data: K u].

It was synonymized subjectively with Cimoliasaurus by Bayer (1914), Bayer (1916).

It was assigned to Squamata by Fritsch (1905); and to Plesiosauria by Sepkoski (2002).
Brimosaurus grandis was named by Leidy (1855). Its type specimen is Berlin, a set of vertebrae (four vertebrae), and it is a 3D body fossil. Its type locality is near Greenville, which is in a Campanian/Campanian terrestrial horizon in the Mooreville Chalk Formation of Arkansas. It is the type species of Brimosaurus.

It was recombined as Cimoliasaurus grandis by Cope (1869), Hay (1902); it was considered a nomen dubium by Welles (1943); it was considered a nomen vanum by Welles (1962); it was considered a nomen dubium by Persson (1963).

Synonymy list

Year	Name and author
1851	Cimoliasaurus Leidy pp. 325-326
1855	Brimosaurus grandis Leidy p. 72 figs. pl. 2, fig. 1-3
1869	Brimosaurus grandis Cope p. 43
1869	Cimoliasaurus Cope p. 265
1869	Cimoliasaurus grandis Cope p. 266
1871	Cimoliasaurus Cope p. 235
1875	Cimoliasaurus Cope p. 15
1889	Muraenosaurus brevior Lydekker
1889	Cimoliosaurus Lydekker pp. 182-183
1889	Cimoliosaurus brevior Lydekker p. 243 fig. 75
1889	Muraenosaurus brevior Lydekker p. 243 fig. 75
1892	Cimoliosaurus Seeley p. 151
1902	Cimoliasaurus Hay p. 458
1902	Cimoliasaurus grandis Hay p. 459
1903	Cimoliasaurus Williston p. 7
1903	Brimosaurus grandis Williston p. 8
1904	Cimoliasaurus maccoyi Etheridge p. 312 figs. Pls. 42-44
1905	Iserosaurus Fritsch p. 20 fig. 18
1905	Hunosaurus Fritsch p. 25 figs. 25–29; Pl. 7:1–4
1906	Cimoliasaurus Williston p. 222
1914	Cimoliasaurus Wegner p. 291
1930	Brimosaurus grandis Hay p. 119
1930	Cimoliasaurus Hay p. 119
1940	Cimoliosaurus White p. 466
1960	Cimoliosaurus Delair p. 67
1960	Cimoliosaurus brevior Delair p. 67
1963	Cimoliasaurus Persson p. 18
1991	Cimoliasaurus maccoyi Fordyce p. 1173
2002	Cimoliasaurus Sepkoski
2002	Hunosaurus Sepkoski
2002	Iserosaurus Sepkoski
2009	Cimoliasaurus O'Keefe and Street p. 49

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria

Rank	Name	Author
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()
suborder	Sauropterygia
order	Plesiosauria	de Blainville 1835
superfamily	Plesiosauroidea	Welles 1943
family	Elasmosauridae	Cope 1869
genus	Cimoliasaurus	Leidy 1851

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.

G. †Cimoliasaurus Leidy 1851

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†Cimoliasaurus magnus Leidy 1851

†Cimoliosaurus laramiensis Knight 1900

†Cimoliosaurus magnus Leidy 1851

†Cimoliosaurus snowii Williston 1890

Invalid names: Brimosaurus grandis Leidy 1855 [nomen dubium], Cimoliasaurus brevior Lydekker 1889 [nomen dubium], Cimoliasaurus maccoyi Etheridge 1904 [nomen dubium], Hunosaurus Fritsch 1905 [synonym], Iserosaurus Fritsch 1905 [synonym]

Diagnosis

No diagnoses are available