Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
       Subkingdom Pteridobiotina Britton & A. Br. (1896)
         Superphylum Pteridophytanae Doweld (2001)
           Phylum Marattiophyta Heintze (1927) [monotypic] see Division Monilophyta Cantino & Donoghue
             Class Marattiopsida Doweld (2001) see Subclass Marattiidae Klinge (1882)
               Order †Asterothecales Doweld (2001) see Order Marattiales Link (1833)
                 Family †Ptychocarpaceae Doweld (2001), nom. cons. prop. [monotypic]
                   Genus †Ptychocarpus C.E.Weiss (1869)