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 Marattiopsida Doweld (2001) see Subclass Marattiidae Klinge (1882)
           Order Marattiales Link (1833)
             Family †Ptychocarpaceae Doweld (2001), nom. cons. prop. [monotypic]
               1 Genus †Ptychocarpus C.E.Weiss (1869)