Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Subkingdom Pteridobiotina Britton & A. Br. (1896)
     Superdivision Pteridophytanae Doweld (2001) [monotypic] see Superphylum Pteridophytanae Doweld (2001)
       Division Monilophyta Cantino & Donoghue
         Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns
           Order Schizaeales Schimp. (1869)
             Family †Klukiaceae C.F.Reed (1948)
               1 Genus †Klukia Racib. (1890)
               2 Genus †Naktongia Oishi (1939)
               3 Genus †Ruffordia Seward (1894)
               4 Genus †Schizaeopteris Stopes & Fujii (1910)