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List of plesiosaurs

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This list of plesiosaurs is a comprehensive listing of all genera that have ever been included in the order Plesiosauria, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (nomen dubium), or were not formally published (nomen nudum), as well as junior synonyms of more established names, and genera that are no longer considered plesiosaurs.

Scope and terminologyEdit

There is no official, canonical list of plesiosaur genera but one of the most thorough attempts can be found on the Plesiosauria section of Mikko Haaramo's Phylogeny Archive; also pertinent is the Plesiosaur Genera section at Adam Stuart Smith's Plesiosaur Directory.

Naming conventions and terminology follow the International Code of Zoological Nomenclature. Technical terms used include:

  • Junior synonym: A name which describes the same taxon as a previously published name. If two or more genera are formally designated and the type specimens are later assigned to the same genus, the first to be published (in chronological order) is the senior synonym, and all other instances are junior synonyms. Senior synonyms are generally used, except by special decision of the ICZN, but junior synonyms cannot be used again, even if deprecated. Junior synonymy is often subjective, unless the genera described were both based on the same type specimen.
  • Nomen nudum (Latin for "naked name"): A name that has appeared in print but has not yet been formally published by the standards of the ICZN. Nomina nuda (the plural form) are invalid, and are therefore not italicized as a proper generic name would be. If the name is later formally published, that name is no longer a nomen nudum and will be italicized on this list. Often, the formally published name will differ from any nomina nuda that describe the same specimen. In this case, these nomina nuda will be deleted from this list in favor of the published name.
  • Preoccupied name: A name that is formally published, but which has already been used for another taxon. This second use is invalid (as are all subsequent uses) and the name must be replaced. As preoccupied names are not valid generic names, they will also go unitalicized on this list.
  • Nomen dubium (Latin for "dubious name"): A name describing a fossil with no unique diagnostic features. As this can be an extremely subjective and controversial designation, this term is not used on this list.

AEdit

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Attenborosaurus BW

Attenborosaurus

BEdit

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Brachauchenius lucasi2DB

Brachauchenius lucasi trying to catch Hesperornis.

CEdit

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Cryptoclidus oxoniesis skeleton

Cryptocleidus model.

DEdit

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Dolichorhynchops BW

Dolichorhynchops osborni from the Late Cretaceous of North America

EEdit

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Elasmosaurus2

Drawing of Elasmosaurus platyurus

FEdit

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Futabasaurus-suzukii fossil-rock replica at Tokyo NSM

Cast of fossils of Futabasaurus suzukii exhibited at the National Science Museum of Japan.

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HEdit

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JEdit

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KEdit

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Kronosaurus

Kronosaurus.

LEdit

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Leptocleidus BW

Leptocleidus capensis

MEdit

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Microcleidus1DB

A drawing of Microcleidus

NEdit

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Nichollssaura BW

Two Nichollssaura swimming in the Boreal Sea.

OEdit

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PEdit

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PliosaurusDB12

A drawing of Pliosaurus.

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REdit

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Rhomaleosaurus BW

Rhomaleosaurus megacephalus from the Early Jurassic of Europe

SEdit

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Styxosaurus BW

A drawing of Styxosaurus

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Thalassiodracon

life restoration of Thalassiodracon hawkinsi

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Umoonasaurus BW

Umoonasaurus demoscyllus from the Early Cretaceous of Australia

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WEdit

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Kronosaurus hunt1DB

Woolungasaurus attacked by Kronosaurus.

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Z
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ReferencesEdit

  1. Haaramo, Mikko (15 November 2005). "Plesiosauria". Mikko's Phylogeny Archive. http://www.fmnh.helsinki.fi/users/haaramo/Metazoa/Deuterostoma/Chordata/Reptilia/Sauropterygia/Plesiosauria.htm. Retrieved on 2006.
  2. Smith, Adam Stuart. "Plesiosaur Genera". The Plesiosaur Directory. http://www.plesiosauria.com/genera.html. Retrieved on 2006.

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