Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Teleostomi
       Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
         Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes
           Class Reptilia Linnaeus, 1758 [paraphyletic] - reptiles
             Subclass Diapsida Osborn, 1903 - diapsids see Clade Diapsida Osborn 1903 [Gauthier & de Queiroz 2020]
               Infraclass Lepidosauromorpha Benton, 1983 see Subclass Lepidosauromorpha Benton, 1983
                 Superorder †Sauropterygia Owen, 1860
                   Order †Plesiosauria Blainville, 1835 - plesiosaurs
                     Superfamily †Pliosauroidea Welles, 1943 [monotypic] see Suborder Pliosauroidea Welles, 1943
                       Family †Pliosauridae Seeley, 1874
                         01 Genus †Archaeonectrus Novozhilov, 1964
                         02 Genus †Eretmosaurus Seeley, 1874
                         03 Genus †Eurycleidus Andrews, 1922
                         04 ?Genus †Eurysaurus Gaudry, 1878
                         05 Genus †Macroplata Swinton, 1930
                         06 Genus †Rhomaleosaurus Seeley, 1874
                         07 Genus †Bishanopliosaurus Dong, 1980
                         08 Genus †Brachauchenius Williston, 1903
                         09 Genus †Dolichorhynchops Williston, 1902
                         10 Genus †Kronosaurus Longman, 1924
                         11 Genus †Leptocleidus Andrews, 1922
                         12 Genus †Liopleurodon Sauvage, 1873
                         13 ?Genus †Megalneusaurus Knight, 1898
                         14 Genus †Peloneustes Lydekker, 1889
                         15 Genus †Peyerus Stromer, 1935
                         16 Genus †Pliosaurus Owen, 1841
                         17 Genus †Polyptychodon Owen, 1841
                         18 Genus †Simolestes Andrews, 1909
                         19 Genus †Stretosaurus Tarlo, 1959
                         20 Genus †Sinopliosaurus Young, 1944
                         21 Genus †Strongylokrotaphus Novozhilov, 1964
                         22 Genus †Yuzhoupliosaurus Zhang Yihong, 1985