Order Testudines Wagler, 1830 - turtles Suborder Cryptodira Cope, 1868 Superfamily Trionychoidea Gray, 1825 Family Trionychidae Gray, 1825 - softshell turtles Subfamily Cyclanorbinae Lydekker, 1889 Genus Lissemys Smith, 1931 Lissemys ceylonensis (Gray, 1856) - Sri Lankan flapshell turtle