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Cryptoclidus eurymerus
Taxonomy
Plesiosaurus eurymerus was named by Phillips (1871). Its type specimen is CAMSM specimen (Holotype; Sedgwick Museum, Cambridge) probably lost; BMNH R2860 (neotype almost complete skeleton), a partial skeleton (forelimb and vertebrae), and it is a 3D body fossil. Its type locality is Bedford marine reptiles, which is in a Callovian marine horizon in the Oxford Clay Formation of the United Kingdom. It is the type species of Cryptoclidus.
It was recombined as Cimoliosaurus eurymerus by Lydekker (1889) and Lydekker (1889); it was recombined as Cimoliosaurus eumerus by Seeley (1892); it was synonymized subjectively with Cryptocleidus oxoniensis by Andrews (1895); it was recombined as Cryptocleidus eurymerus by Delair (1960); it was recombined as Cryptoclidus eurymerus by Brown (1981), O'Keefe (2001), Gasparini et al. (2002) and Araujo et al. (2008); it was misspelled as Cimoliosaurus eumerus by Carrano (2025).
It was recombined as Cimoliosaurus eurymerus by Lydekker (1889) and Lydekker (1889); it was recombined as Cimoliosaurus eumerus by Seeley (1892); it was synonymized subjectively with Cryptocleidus oxoniensis by Andrews (1895); it was recombined as Cryptocleidus eurymerus by Delair (1960); it was recombined as Cryptoclidus eurymerus by Brown (1981), O'Keefe (2001), Gasparini et al. (2002) and Araujo et al. (2008); it was misspelled as Cimoliosaurus eumerus by Carrano (2025).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1871 | Plesiosaurus eurymerus Phillips p. 315 fig. 120 |
| 1889 | Cimoliosaurus eurymerus Lydekker p. 209 |
| 1892 | Muraenosaurus (Cryptoclidus) platymerus Seeley |
| 1892 | Plesiosaurus durobrivensis Seeley fig. 5 |
| 1892 | Cimoliosaurus eumerus Seeley p. 145 |
| 1892 | Muraenosaurus (Cryptoclidus) platymerus Seeley p. 145 |
| 1895 | Cryptoclidus platymerus Andrews p. 356 |
| 1915 | Apractocleidus teretipes Smellie p. 341 |
| 1960 | Cryptocleidus eurymerus Delair p. 66 |
| 1981 | Cryptoclidus eurymerus Brown p. 256 |
| 2001 | Cryptoclidus eurymerus O'Keefe p. 15 |
| 2002 | Cryptoclidus eurymerus Gasparini et al. |
| 2008 | Cryptoclidus eurymerus Araujo et al. p. 24 fig. 4 |
| 2025 | Cimoliosaurus eumerus Carrano |
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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.
†Cryptoclidus eurymerus Phillips 1871
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Invalid names: Apractocleidus teretipes Smellie 1915 [synonym], Cryptoclidus platymerus Seeley 1892 [synonym], Plesiosaurus durobrivensis Seeley 1892 [synonym]
Diagnosis
No diagnoses are available