Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [[crown] organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           [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 Pteridophytanaeᵀ Doweld (2001)
                     [Phylum Pteridophytaᵀ Schimp. (1879)] see Phylum Filicinophyta
                       [Class Cyatheopsida Doweld (2001)] see Order Cyatheales A.B.Frank (1877)
                         [Subclass Cyatheidaeᵀ Doweld (2001)]
                           [Order Hymenophyllopsidales Pic.Serm. ex Reveal (1993) [monotypic]] see Order Cyatheales A.B.Frank (1877)
                             1 [Family Hymenophyllopsidaceaeᵀ Pic.Serm. (1970)] see Family Cyatheaceae Kaulf. (1827)