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 Cyatheopsida Doweld (2001) see Order Cyatheales A.B.Frank (1877)
               Subclass Cyatheidae Doweld (2001)
                 Order Dicksoniales Pic.Serm. ex Reveal (1993) see Order Cyatheales A.B.Frank (1877)
                   Family †Tanydoraceae J.E.Skog (1986)