After Meylan & Ganko, 1988 [from Meylan & Ganko, 1997, Meylan, 2001], Parham & Hutchison, 2003, and Parham, 2005

<==o Cryptodira Dumeril & Bibron, 1835 [non Cope, 1871] [Cryptodiramorpha Lee, 1995 sensu Parham & Hutchison, 2003] (pystytaivuttajat)
   |-- †Kayentachelys aprix Gaffney, Hutchison, Jenkins & Meeker, 1987; E.Jur, SWNAm. [Kayentachelyidae Gaffney, Hutchison, Jenkins & Meeker, 1987]
   |-- †Indochelys spatulata Datta, Manna, Ghosh & Das, 2000 [Indochelyidae Datta, Manna, Ghosh & Das, 2000]
   `--o Selmacryptodira Gaffney, Hutchinson, Jenkins & Meeker, 1987
      |-- †Paracryptodira [=? Pleurosternoidea Hay, 1930]
      `--o Eucryptodira Gaffney, 1975a sensu Gaffney, 1984 [Daiocryptodira Milner, 2004]
         |--+--o †Eurysternidae Dollo, 1886
         |  |  |-- †Solnhofia parsonsi Gaffney, 1975b
         |  |  |-- †Idiochelys fitzingeri Meyer, 1839
         |  |  `--o †Eurysternum von Meyer, 1839 [Achelonia, Acichelys, Aplax, Euryaspis, Hydropelta, Palaeomedusa]
         |  |     |-- †E. wagleri Meyer, 1839
         |  |     |-- †E. radianus (Wagner, 1861)
         |  |     |-- †E. ignoratum Bräm, 1965
         |  |     `?- †E.? neuquinum Fernandez & Fuente, 1988
         |  `--o †Plesiochelyidae Rütimeyer, 1873
         |     |?- †Brodiechelys brodiei (Lydekker, 1889) Nopcsa, 1928 sensu Pérez-García, 2012 [Plesiochelys brodiei Lydekker, 1889; Plesiochelys valdensis Lydekker, 1889; Plesiochelys vectensis Hooley, 1900]
         |     |?- †Craspedochelys Rütimeyer, 1873
         |     |?- †Thalassemys moseri [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]
         |     |--o †Plesiochelys [Brodiechelys; Parachelys; Tholemys; Wincania]
         |     |  `-- †P. etalloni
         |     `-- †Portlandemys mcdowelli Gaffney, 1975a
         `--+?=Xinjiangchelyidae Nesov, 1990
            `--o Centrocryptodira
               |?- †“Sinemys” wuerhoensis (Yeh, 1973)
               |--+-- †Chubutemys copelloi Gaffney, Rich, Vickers-Rich, Constantine, Vacca & Kool, 2007; L.Cret. SAm.
               |  `--o †Meiolaniidae
               |     |?- †Crossochelys
               |     |-- †Otwayemys
               |     |-- †Niolamia argentina
               |     `--+-- †Ninjemys oweni
               |        `--+-- Warkalania carinaminor
               |           `--o †Meiolania [Ceratochelys, Miolania]
               |              |-- †M. brevicollis
               |              `--+-- †M. platyceps
               |                 `--+-- †M. mackeyi
               |                    `-- †M. sp. [Australia]
               `--+?- †Osteopygis emarginatus Cope, 1868; U.Cret.-Pal. NA. [taxonomic history]
                  |?- †Macrobaenidae Sukhanov, 1964 [monophyly undemonstrated, also treated as paracryptodires]
                  |?-o †“Sinemydidae” Yeh, 1963 [monophyly undemonstrated]
                  |  |?- †Tienfucheloides undutus Nesov, 1978
                  |  |?- †“Sinemys” wuerhoensis Yeh, 1973
                  |  `--o †Sinemys Wiman, 1930
                  |     |-- †S. lens Wiman, 1930
                  |     `-- †S. gamera Brinkman & Peng, 1993
                  `--+-- †Judithemys sukhanovi Parham & Hutchison, 2003
                     |--o †Hangaiemys Sukhanov & Narmandakh, 1974 [a macrobaenid sensu Sukhanov, 2000]
                     |  |?- †H. kansuensis (Bohlin, 1953) [“Osteopygis” kansuensis Bohlin, 1953]
                     |  |-- †H. hoburensis Sukhanov & Narmandakh, 1974
                     |  `-- †“H. leptis” [Sukhanov & Narmandakh, in press] [nomen nudum]
                     `-- Polycryptodira [Cryptodira sensu Parham & Hutchison, 2003] (Recent cryptodirans; nykypystytaivuttajat)

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