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

<==o Cryptodira Dumeril & Bibron, 1835 [non Cope, 1871] [Pan-Cryptodira Joyce, Parham & Gauthier, 2004; 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]
   |?- †Camerochelys vilanovai Pérez-García & Murelaga, 2013
   `--o Selmacryptodira Gaffney, Hutchinson, Jenkins & Meeker, 1987
      |-- †Paracryptodira [=? Pleurosternoidea Hay, 1930]
      `--o Eucryptodira Gaffney, 1975a sensu Gaffney, 1984 [Daiocryptodira Milner, 2004]
         |--+-- †Plesiochelyidae Baur, 1888 [non Rütimeyer, 1873?] [incl.? Thalassemydidae Zittel, 1889]
         |  `--o †Eurysternidae Dollo, 1886
         |     |-- †Idiochelys fitzingeri Meyer, 1839
         |     |-- †Solnhofia parsonsi Gaffney, 1975b
         |     |?- †Palaeomedusa testa Meyer, 1860 [Eurysternum crassipes Wagner 1859; Thalassemys marina Fraas 1903]
         |     `--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
         `--+?=Xinjiangchelyidae Nesov, 1990
            `--o Centrocryptodira
               |?- †“Sinemys” wuerhoensis (Yeh, 1973)
               |?- †Meiolaniformes Sterli & de la Fuente, 2012
               `--+?- †Osteopygis emarginatus Cope, 1868; U.Cret.-Pal. NA. [taxonomic history]
                  |?- †Macrobaenidae Sukhanov, 1964 [monophyly undemonstrated, also treated as paracryptodires]
                  |?-o †Sinemydidae Yeh, 1963 sensu Zhou & Rabi, 2015 [Macrobaenidae Sukhanov, 1964 in partim
                  |  |?- †Tienfucheloides undutus Nesov, 1978
                  |  |?- †“Sinemys” wuerhoensis Yeh, 1973
                  |  |--+--o †Kirgizemys Nesov & Khozatskii, 1973 [Nessov & Khozatsky]
                  |  |  |  |-- †K. exaratus Nesov & Khozatskii, 1978
                  |  |  |  `-- †“K.dmitrievi Nesov & Khozatskii, 1981
                  |  |  `--+-- †Judithemys sukhanovi Parham & Hutchison, 2003
                  |  |     `-- †Changmachelys bohlini Brinkman, Yuan, Q. Ji, D. Ji, & You, 2013
                  |  |-- ̸Xiaochelys ningchengensis Zhou & Rabi, 2015; E.Cret. NEAs.
                  |  `--+--+-- †Liaochelys jianchangensis Zhou, 2010
                  |     |  `--o †Ordosemys Brinkman & Peng, 1994
                  |     |     |?- †O. brinkmania
                  |     |     |?- †O. perforata
                  |     |     |-- †O. liaoxiensis (Ji, 1995) [Manchurochelys liaoxiensis Ji, 1995]
                  |     |     `-- †O. leios Brickman & Peng, 1993
                  |     `--+-- †Manchurochelys manchoukuoensis Endo & Shikama, 1932
                  |        `--+-- †Dracochelys bicuspis Gaffney & Yah, 1992 [Gaffney & Ye], L. Cret CAs.
                  |           `--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)

After Zhou & Rabi, 2015

<==o Pan-Cryptodira
   |-- †Plesiochelyidae
   `--+-- †Eurysternidae
      `--+--+-- †Xinjiangchelyidae
         |  `--o †Sinemydidae
         |     |--+-- †Kirgizemys
         |     |  `--+-- †Judithemys
         |     |     `-- †Changmachelys
         |     `--+-- ̸Xiaochelys
         |        `--+--+-- †Liaochelys
         |           |  `-- †Ordosemys
         |           `--+-- †Manchurochelys
         |              `--+-- †Dracochelys
         |                 `-- †Sinemys
         `--o Cryptodira
            |-- Chelydridae (snapping turtles; näykkijäkilpikonnat)
            `--o Procoelocryptodira
               |--o Chelonioidea Bauer, 1893 (sea turtles; merikilpikonnat)
               |  |-- Chelonioinea [Cheloniidae sensu lato; Cheloniidae sensu Hirayama, 1997; Pancheloniidae Joyce, Parham & Gauthier, 2004] (karettikilpikonnansukuiset merikilpikonnat)
      |  `-- Dermochelyoidea Baur, 1888 (merinahkakilpikonnansukuiset merikilpikonnat; letherback turtle-like turtles)
      `--o Chelomacryptodira
         |?- †Planetochelys
         |?- Trionychoidea (pehmeäkilpikonnat)
         `?- Testudinoidea




   |-- †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]
   |?- †Camerochelys vilanovai Pérez-García & Murelaga, 2013
   `--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
         |     |-- †Idiochelys fitzingeri Meyer, 1839
         |     |--
         |     |?- †Palaeomedusa testa Meyer, 1860 [Eurysternum crassipes Wagner 1859; Thalassemys marina Fraas 1903]
         |     `--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 Centrocryptodira
               |?- †“Sinemys” wuerhoensis (Yeh, 1973)
               |?- †Meiolaniformes Sterli & de la Fuente, 2012
               `--+?- †Osteopygis emarginatus Cope, 1868; U.Cret.-Pal. NA. [taxonomic history]
                  |?- †Macrobaenidae Sukhanov, 1964 [monophyly undemonstrated, also treated as paracryptodires]
                  |?-o †Sinemydidae Yeh, 1963 sensu Zhou & Rabi, 2015 [Macrobaenidae Sukhanov, 1964 in partim
                  |  |?- †Tienfucheloides undutus Nesov, 1978
                  |  |?- †“Sinemys” wuerhoensis Yeh, 1973
                  |  |--+--o †Kirgizemys Nesov & Khozatskii, 1973 [Nessov & Khozatsky]
                  |  |  |  |-- †K. exaratus Nesov & Khozatskii, 1978
                  |  |  |  `-- †“K.dmitrievi Nesov & Khozatskii, 1981
                  |  |  `--+-- †Judithemys sukhanovi Parham & Hutchison, 2003
                  |  |     `-- †Changmachelys bohlini Brinkman, Yuan, Q. Ji, D. Ji, & You, 2013
                  |  |-- ̸Xiaochelys ningchengensis Zhou & Rabi, 2015; E.Cret. NEAs.
                  |  `--+--+-- †Liaochelys jianchangensis Zhou, 2010
                  |     |  `--o †Ordosemys Brinkman & Peng, 1994
                  |     |     |?- †O. brinkmania
                  |     |     |?- †O. perforata
                  |     |     |-- †O. liaoxiensis (Ji, 1995) [Manchurochelys liaoxiensis Ji, 1995]
                  |     |     `-- †O. leios Brickman & Peng, 1993
                  |     `--+-- †Manchurochelys manchoukuoensis Endo & Shikama, 1932
                  |        `--+-- †Dracochelys bicuspis Gaffney & Yah, 1992 [Gaffney & Ye], L. Cret CAs.
                  |           `--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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