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 Apalone mutica (LeSueur, 1827) - smooth softshell turtle 1 Apalone mutica mutica (LeSueur, 1827) - midland smooth softshell turtle 2 Apalone mutica calvata (Webb, 1959) - Gulf Coast smooth softshell turtle