Order Testudines Wagler, 1830 - turtles
   Suborder Cryptodira Cope, 1868
     Superfamily Trionychoidea Gray, 1825
       Family Trionychidae Gray, 1825 - softshell turtles
         Subfamily Trionychinae Gray, 1825
           Genus Apalone Rafinesque, 1832
             1 Apalone ferox (Schneider, 1783) - Florida softshell turtle
             2 Apalone mutica (LeSueur, 1827) - smooth softshell turtle
             3 Apalone spinifera (LeSueur, 1827) - spiny softshell turtle