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 Pteridophyta Schimp. (1879) see Phylum Filicinophyta
             Class Pteridopsida Ritgen (1828) see Order Polypodiales Link (1833)
               Subclass Pterididae Schmakov (2001) [monotypic]
                 Order Pteridales Doweld (2001) see Order Polypodiales Link (1833)
                   Family Platyzomataceae Nakai (1950) see Subfamily Platyzomatoideae (Nakai) A.F.Tryon