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 Polypodiales Link (1833) - cathetogyrates
             Family Pteridaceae E.D.M.Kirchn. (1831) - pteroids
               Subfamily Cheilanthoideae Horvat (1927)
                 Genus Tryonella Pic.Serm. (1974) see Genus Doryopteris J.Sm. (1841), nom. cons.