Classification of the order Rhynchocephalia
Or. Rhynchocephalia Günther 1867 [rhynchocephalian]
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Fm. †Gephyrosauridae Evans 1980
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G. †Gephyrosaurus Evans 1980
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†Gephyrosaurus bridensis Evans 1980
†Gephyrosaurus evansae Whiteside and Duffin 2017
G. †Hamatopus Lilienstern 1939
Invalid names: Pachystropheidae Kuhn 1961 [empty], Sauranodontes Lortet 1892 [empty], Sphenodontiformes Hay 1930 [empty], Tholodontidae Kuhn [empty]