Classification of the genus Thalassiodracon
G. †Thalassiodracon Storrs and Taylor 1996
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†Thalassiodracon hawkinsii Owen 1840
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Invalid names: Plesiosaurus eleutheraxon Seeley 1865 [synonym], Plesiosaurus etheridgei Huxley 1858 [synonym], Plesiosaurus etheridgii Huxley 1858 [synonym]
Invalid names: Plesiosaurus hexatarsostinus Hawkins 1840 [nomen oblitum], Plesiosaurus pentetarsostinus Hawkins 1834 [nomen oblitum], Plesiosaurus triatarsostinus Hawkins 1834 [nomen oblitum]