After Meylan & Ganko, 1988 [from Meylan & Ganko, 1997 and Meylan, 2001], and Meylan, Moody, Walker & Chapman, 2000

<==o Trionychoidea sensu Meylan et al., 2000 (pehmeäkilpikonnansukuiset kilpikonnat)
   |?- †Hoplochelys
   |?- †Peltochelys duchastelii Doll, 1885
   |-- †Adocidae Cope, 1870 [incl. Nanshiungchelyidae Yeh, 1966]
   `--+-- †Emarginachelys
      `--+--o Dermatemydidae (tabaskokilpikonnat)
         |  |-- Dermatemys mawi (tabaskokilpikonna)
         |  `--o †Baptemys Leidy, 1870
         |     |-- †B. garmani
         |     `-- †B. wyomingensis
         `--+--o Kinosternidae Hay, 1892 [non? Baur, 1893] sensu Bourque & Schubert, 2015 (musk turtles; myskikilpikonnat ("valeliejukilpikonnat"))
            |  |--o †Aspideretes Yeh, 1965
            |  |  |-- †A. maortuensis Yeh, 1965
            |  |  |-- †A. alashanensis
            |  |  |-- †A. foveatus Yeh, 1965
            |  |  `-- †A. alleni Yeh, 1965
            |  `--+-- †“Xenochelys” lostcabinensis (Hutchison, 1991)
            |     `--+-- †“Xenochelys” bridgerensis (Hutchison, 1991)
            |        `--+-- †Xenochelys formosa Hay, 1906
            |           `--+--o Kinosterninae Hay, 1892 [non? Baur, 1893]
            |              |  |-- Sternotherus Gray, 1825 (musk turtles; myskikilpikonnat)
            |              |  `-- Kinosternon Spix, 1824 (liejukilpikonnat)
            |              `--+-- †Baltemys staurogastros Hutchison, 1991
            |                 `?-o Staurotypinae [see Chelydridae for alternative position]
            |                    |-- Claudius angustatus Cope, 1865 (Narrow-bridged Musk Turtle)
            |                    `--o Staurotypus
            |                       |-- S. salvini Gray, 1864 (Chiapas giant musk turtle)
            |                       `-- S. triporcatus (Wiegmann, 1828) (Mexican giant musk turtle )
            `--+-- †Sandownia harrisi Meylan et al., 2000
               `--+--o Carettochelyidae Boulenger, 1887 (flynkilpikonnat)
                  |  |?- †Sinaspideretes wimani Young & Chow, 1953 [Sinaspideretidae Ckhikvadze, 1987]
                  |  |--o †Anosteirinae Lydekker, 1889
                  |  |  |-- †Anosteira ornata Leidy, 1871
                  |  |  |-- †Kyzilkumemys schultzi Nesov, 1977 [Anosteira shuvalovi] U. Cret. CAs.
                  |  |  `-- †Pseudoanosteira U. Eoc. NA.
                  |  `--o Carettochelyinae (Boulenger, 1887)
                  |     `-- Carettochelys insculpta Ramsay, 1886 (flynkilpikonna; New Guinea plateless river turtle)
                  `-- Trionychidae Fitzinger, 1826 [non Bell, 1828??] (pehmeäkilpikonnat)

?Trionychoidea incertae sedis:

Khunnuchelys Brickman, Nessov & Peng, 1993
        †K. kizulkumensis Brickman, Nessov & Peng, 1993

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