vertebrates Cuvier, 1812 - vertebrates
   Cohort Amniota Haeckel, 1866 see Clade Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988]
     Class "Reptilia" Linnaeus, 1758 - reptiles
       Subclass Testudines Wagler, 1830 see Class Chelonia Brongniart, 1800
         Order Casichelydia Gaffney, 1975
           Suborder Cryptodira Cope, 1868
             Superfamily Chelonioidea Oppel, 1811
               1 Family †Protostegidae Cope, 1873
               2 Family †Toxochelyidae Hay, 1902
               3 Family Cheloniidae Oppel, 1811