Order Testudines Wagler, 1830 - turtles
   Suborder Cryptodira Cope, 1868
     Superfamily Trionychoidea Gray, 1825
       Family Trionychidae Gray, 1825 - softshell turtles
         Subfamily Trionychinae Gray, 1825
           Genus Nilssonia Gray, 1872
             1 Nilssonia formosa (Gray, 1869) - Burmese peacock softshell turtle
             2 Nilssonia gangetica (Cuvier, 1825) - Indian softshell turtle
             3 Nilssonia hurum (Gray, 1830) - Indian peacock softshell turtle
             4 Nilssonia leithii (Gray, 1872) - Leith's softshell turtle
             5 Nilssonia nigricans (Anderson, 1875) - black softshell turtle