After Carroll, 1988, with species from the “Paleobiology database”

<==o †Plesiochelyidae Baur, 1888 [non Rütimeyer, 1873?] [incl.? Thalassemydidae Zittel, 1889]
   |?-o †Brodiechelys Nopcsa, 1928 [has also been inclueded in Xinjiangchelyidae]
   |  |-- †B. brodiei (Lydekker, 1889) Nopcsa, 1928 [Plesiochelys brodiei Lydekker 1889; Plesiochelys valdensis Lydekker, 1889; Plesiochelys vectensis Hooley, 1990]
   |  `-- †B. royoi Perez-Garcia, Gasulla & Ortega, 2013
   |?-o †Craspedochelys Rütimeyer, 1873 [=? †Plesiochelys Rütimeyer, 1873]
   |  |-- †C. jaccardi (Pictet, 1860) [Emys jaccardi Pictet, 1860]
   |  `-- †C. picteti Rütimeyer, 1873
   |?-o †Thalassemys Rütimeyer, 1859
   |  |-- †T. carva Nessov, 1984
   |  |-- †T. hugii Rütimeyer, 1873 [Thalassemys gresslyi Rütimeyer, 1873]
   |  `-- †T. moseri Bräm, 1965 [on skull characters (Gaffney & Meylan, 1988) (Milner, 2004)]
   |?- †Hylaeochelys belli (Mantell, 1844) Lydekker, 1889a [Chelone belli mantell, 1844; Pleurosternum emarginatum Owen, 1853; Pleurosternum latiscutatum Owen, 1853; Chelone costata Owen, 1853; Platemys mantelli Owen, 1853; Platemys dixoni Owen, 1853; Hylaeochelys latiscutata (Owen, 1853); Hylaeochelys sollasi Nopcsa, 1928]
   |?- †Parachelys eichstaettensis Meyer, 1864
   |--o †Plesiochelys Rütimeyer, 1873 [Brodiechelys; Tholemys; Wincania]
   |  |-- †P. beaugrandi (Sauvage, 1872) [Emys beaugrandi Sauvage, 1872]
   |  |-- †P. dutertrei (Sauvage, 1872) [Emys dutertrei Sauvage, 1872]
   |  |-- †P. etalloni (Pictet & Humbert, 1857) Rütimeyer, 1873 [Emys etalloni Pictet & Humbert 1857;  Plesiochelys solodurensis Rütimeyer, 1873; Plesiochelys langii Rütimeyer 1873; Plesiochelys sanctaeverenae Rütimeyer, 1873; Craspedochelys picteti Rütimeyer, 1873; Craspedochelys crassa Rütimeyer, 1873; Stylemys lindensis Maack, 1869] [type]
   |  |-- †P. hannoverana (Maack, 1869) [Stylemys hannoverana Maack, 1869]
   |  |-- †P. minor Portis, 1878
   |  |-- †P. normandicus Bergounioux, 1937
   |  |-- †P. oshanensis Yeh, 1973
   |  `-- †P. planiceps (Owen, 1842) [Chelone planiceps; Stegochelys planiceps]
   |-- †Portlandemys mcdowelli Gaffney, 1975a
   `--o †Tropidemys Rütimeyer, 1873
      |-- †T. langii (Rütimeyer, 1873) [=? Plesiochelys langii Rütimeyer 1873; Tropidemys expansa Rütimeyer 1873, Tropidemys gibba Rütimeyer, 1873]
      |-- †T. morinica Sauvage, 1880
      `-- †T. seebachi Portis, 1878

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