Testudines Wagler, 1830 - turtles
   Cryptodira Cope, 1868
     Testudinoidea Batsch, 1788
       Emydidae Rafinesque, 1815 - pond turtles
         Deirochelyinae Agassiz, 1857
           Graptemys Agassiz, 1857
             Graptemys ernsti Lovich & McCoy, 1992 - Escambia map turtle