After Meylan & Ganko, 1988 [from Meylan & Ganko, 1997 and Meylan, 2001] and Anquetin, Barrett, Jones, Moore-Fay & Evans, 2009 (fig. 3d)

<==o Chelonia Macartney, 1802 (turtles; kilpikonnat) [alternative phylogenetic position after Rieppel & deBraga, 1996]
   |-- †Odontochelys semitestacea Li, Wu, Rieppel, Wang & Zhao, 2008; L.Trias. SAs.
   `--+-- †Australochelys africanus Gaffney & Kitching, 1994 [Australochelidae sensu Lee, 1997]
      `--o Rhaptochelydia Gaffney & Kitching, 1994 [Testudines Linnaeus, 1758 [non Batsch, 1788] sensu Lee, 1996]
         |-- †Chinlechelys tenertesta Joyce, Lucas, Scheyer, Heckert & Hunt, 2009; L.Trias. WNAm.
         |-- †Proganochelys quenstedtii Baur, 1887; L.Trias. CEu. [Chelytherium; Psammochelys; Stegochelys; Triassochelys] [Proganochelydia: Proganochelyidae]
         `--+?- †Palaeochersis talampayensis
            |?- †Condorchelys antiqua Sterli, 2008; ?M.-?L.Jur., SSAm.
            |?-+-- †Eileanchelys waldmanni Anquetin, Barrett, Jones, Moore-Fay & Evans, 2009; M.Jur. WEu.
            |  `-- †Hackerochelys romani
            `--o Casichelyidia Gaffney, 1975 [Testudinata Klein, 1760 (non Linnaeus, 1758) sensu Lee, 1997] (recent turtles; nykykilpikonnat)
               |-- Pleurodira Cope, 1864 (fide Gaffney & Maylan, 1988) [Panpleurodira] (side-necked turtles; sivutaivuttajat)
               `-- Cryptodira Dumeril & Bibron, 1835 [non Cope, 1871] [Pancryptodira] (cryptodires; pystytaivuttajat)

Testudinata incertae sedis:

Chitracephalus dumonii Dollo, 1884
        †Neusticemys neuquina Fernandez & De La Fuente,, 1988
        †Scutemys appalanata Wiman, 1930 [Scutemys tecta Wiman, 1930]
    †Chelycarapookidae Warren, 1969
        †Chelycarapookus arcuatus Warren, 1969

Alternative phylogenies of basal turtles:

After Gaffney & Kitching, 1994(?):

<==o Chelonia
   |--o †Australochelidae
   |  `-- †Australochelys
   `--o Rhaptochelydia Gaffney & Kitching, 1994
      |--o †Proganochelydia
      |  `--o †Proganochelyidae
      |     `-- †Proganochelys
      `--o Casichelyidia Gaffney, 1975
         |-- Pleurodira
         `-- Cryptodira

After Sterli, 2008:

<==o Testudinata
   |-- †Proganochelys [Proganchelys Sterli, 2008 (lapsus calami)]
   `--+--+-- †Palaeochersis
      |  `-- †Australochelys
      `--+-- †Proterochersis
         `--+-- †Kayentachelys
            |-- †Condorchelys
            |-- †Indochelys
            `--+-- †Heckerochelys
               `--+--+-- †Mongolochelys
                  |  `-- †Meiolania
                  `--+-- †Kallokibotion
                     `-- Testudines

After Li, Wu, Rieppel, Wang & Zhao, 2008:

<==o Testudinata
   |-- †Odontochelys
   `--+-- †Proganochelys
      `--+-- †Palaeochersis
         |-- †Proterochersis
         `-- Testudines

After Anquetin, Barrett, Jones, Moore-Fay & Evans, 2009 (fig. 3d):

<==o Testudinata
   |-- †Proganochelys
   `--+-- †Palaeochersis
      `--+-- †Australochelys
         `--+-- †Proterochersis
            `--+-- †Kayentachelys
               `--+?- †Condorchelys antiqua
                  |--+-- †Eileanchelys
                  |  `-- †Heckerochelys
                  `--+--+-- †Mongolochelys
                     |  `-- †Meiolania
                     `--+-- †Kallokibotion
                        `-- Testudines

After Joyce, Lucas, Scheyer, Heckert & Hunt, 2009 (fig. 3):

<==o  Testudinata
   |-- †Chinlechelys
   |-- †Proganochelys
   `--+-- †Palaeochersis
      |-- †Australochelys
      `--+-- †Proterochersis
         `--+-- †Kayentachelys
            `--+-- †Mongolochelys
               `-- Testudines

 

Reference(s):