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 spinifera (LeSueur, 1827) - spiny softshell turtle Apalone spinifera aspera (Agassiz, 1857) - Gulf Coast spiny softshell turtle