Vertebrata - Sauropterygia

Synonym: Polyptychodon Owen 1841 [nomen vanum]

Parent taxon: Pistosauria according to R. B. J. Benson and P. S. Druckenmiller 2013

Sister taxa: Augustasaurus, Bobosaurus, Pistosauridae, Pistosaurus, Yunguisaurus

Subtaxa: Aptychodon, Bathyspondylus, Embaphias, Eoplesiosaurus, Eretmosaurus, Gymocetus, Hexatarsostinus, Hunosaurus, Iserosaurus, Muraenosauridae, Namuncurania, Neoplesiosauria, Nothosaurops, Orophosaurus, Plesiosauroidea, Pliosauridae, Pliosauroidea, Polyptychodon hudsoni, Polyptychodon interruptus, Rhomaleosauridae, Scarrisaurus, Stratesaurus, Sulmosaurus, Taphrosaurus, Tremamesacleididae, Uronautes

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