|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Reptilia - Sauropterygia - Leptocleididae
It was recombined as Cimoliosaurus valdensis by Lydekker (1889); it was recombined as Plesiosaurus valdensis by Koken (1905); it was considered a nomen vanum by Welles (1962); it was recombined as Hastanectes valdensis by Benson et al. (2013).
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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.
|R. B. J. Benson et al. 2013||Plesiosaurian possessing a possible autapomorphy (ventral ridge of cervical centra pierced by subcentral foramina at midlength, and expands anteriorly to form a triangular platform) and unique character combination explained below (Phylogenetics of other European lowest Cretaceous plesiosaurians): a short neck (c. 20 cervical vertebrae; one or two may be missing), broadly spaced cervical prezygapophyses, cervical centra with a prominent ‘lip’ extending ventrally from the anterior articular surface, a transversely narrow ventral midline ridge on the cervical centra, single-headed rib facets in all cervical vertebrae and a sigmoidal humerus.|