This list of plesiosaurs shows all genera that have ever been included in the order Plesiosauria, excluding purely vernacular terms. The list includes all commonly accepted genera, as well as genera 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.
A[]
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Attenborosaurus
- "Alzadasaurus"
- Anarosaurus
- Apatomerus
- Aphrosaurus
- "Apractocleidus" — possible synonym of Cryptoclidus
- Aptychodon
- Archaeonectrus
- Aristonectes
- Attenborosaurus
- Augustasaurus
B[]
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Brachauchenius lucasi trying to catch Hesperornis.
- Bathyspondylus
- Bishanopliosaurus
- Bobosaurus
- Borealonectes
- Brachauchenius
- Branacasaurus — probable lapsus calami of Brancasaurus
- Brancasaurus
- Brimosaurus
C[]
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Cryptocleidus model.
- Callawayasaurus
- Ceraunosaurus — junior synonym of Trinacromerum
- Charitosaurus
- Chinchenia
- Cimoliasaurus
- Colymbosaurus
- Crymocetus
- Cryptoclidus
- Cymatosaurus
D[]
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Dolichorhynchops osborni from the Late Cretaceous of North America
E[]
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Drawing of Elasmosaurus platyurus
- Edgarosaurus
- Elasmosaurus
- Eopolycotylus
- Eretmosaurus
- Eridanosaurus
- Eromangasaurus
- Eurycleidus
- Eurysaurus
F[]
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Cast of fossils of Futabasaurus suzukii exhibited at the National Science Museum of Japan.
- Fresnosaurus
- Futabasaurus — also a theropod nomen nudum
G[]
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- Georgia — preoccupied by a genus of mollusk
- Georgiasaurus
- Goniosaurus
H[]
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I[]
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J[]
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K[]
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Kronosaurus.
L[]
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Leptocleidus capensis
- Leptocleidus
- Leurospondylus
- Libonectes
- Liopleurodon
- Luetkesaurus
M[]
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A drawing of Microcleidus
- Macroplata
- Manemergus
- Maresaurus
- Mauisaurus
- Megalneusaurus
- "Megalosaurus" — also a valid dinosaur genus
- Microcleidus
- Morenosaurus
- Morturneria
- Muraenosaurus
N[]
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Two Nichollssaura swimming in the Boreal Sea.
- Nichollsia — also a genus of isopod
- Nichollssaura
O[]
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- Occitanosaurus
- Ogmodirus
- Orophosaurus
- Opallionectes
P[]
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A drawing of Pliosaurus.
- Pachycostasaurus
- Pahasapasaurus
- Palmula — preoccupied by a genus of foraminifer, renamed Palmulasaurus
- Palmulasaurus
- Pantosaurus
- Peloneustes
- Pentatarstostinus
- Peyerus — junior synonym of Leptocleidus
- Picrocleidus — junior synonym of Muraenosaurus
- Piptomerus
- Piratosaurus
- Plesioliopleurodon — apparent typographical error for Plesiopleurodon
- Plesiopleurodon
- Plesiopterys
- Plesiosaurus
- Pliosaurus
- Polycotylus
- Polyptychodon
- Procotylus
Q[]
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R[]
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Rhomaleosaurus megacephalus from the Early Jurassic of Europe
S[]
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A drawing of Styxosaurus
- Scanisaurus
- "Seeleysaurus"
- Seeleyosaurus
- Simolestes
- Sinopliosaurus
- Spondylosaurus — junior synonym of Pliosaurus
- Sulcusuchus
- Stereosaurus
- Sthenarosaurus
- "Stretosaurus" — possible junior synonym of Liopleurodon
- Strongylokrotaphus — junior synonym of Pliosaurus
- Styxosaurus
T[]
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life restoration of Thalassiodracon hawkinsi
- Taphrosaurus
- Tapinosaurus
- "Tatenectes"
- Terminonatator
- Thalassiodracon
- Thalassiosaurus — junior synonym of Styxosaurus
- Thalassomedon
- Thalassonomosaurus — junior synonym of Styxosaurus
- "Thaumatosaurus"
- Thililua
- "Trememesacleis" — possible junior synonym of Muraenosaurus
- Tricleidus
- Trinacromerum
- Tuarangisaurus
- Turneria — preoccupied by a genus of ant
U[]
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Umoonasaurus demoscyllus from the Early Cretaceous of Australia
- Umoonasaurus
- Uronautes
V[]
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W[]
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Woolungasaurus attacked by Kronosaurus.
X[]
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Y[]
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- Yuzhoupliosaurus
Z
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References[]
- Haaramo, Mikko (15 November 2005). "Plesiosauria". Mikko's Phylogeny Archive. http://www.fmnh.helsinki.fi/users/haaramo/Metazoa/Deuterostoma/Chordata/Reptilia/Sauropterygia/Plesiosauria.htm.
- Smith, Adam Stuart. "Plesiosaur Genera". The Plesiosaur Directory. http://www.plesiosauria.com/genera.html.