Class Reptilia Linnaeus, 1758 - reptiles
   Subclass Anapsida Osborn, 1903 - anapsids
     Order Chelonia Brongniart, 1800 see Class Chelonia Brongniart, 1800
       Suborder Cryptodira Cope, 1868
         Superfamily Trionychoidea Gray, 1825
           Family Trionychidae Gray, 1825 - softshell turtles
             1 Subfamily Lissemyinae see Subfamily Cyclanorbinae Lydekker, 1889
             2 Subfamily Trionychinae Gray, 1825