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)
                     1 Family †Boegendorfiaceae Kräusel & Weyland (1949), incertae sedis
                     2 Family †Haspiaceae Koidz. (1938), incertae sedis
                     3 [Phylum †Sphenophyllophyta D.H.Scott (1900)] see Division Monilophyta Cantino & Donoghue
                     4 [Phylum Equisetophyta D.H.Scott (1900)] see Division Monilophyta Cantino & Donoghue
                     5 [Phylum †Cladoxylophyta Doweld (2001) [monotypic]] see Division Monilophyta Cantino & Donoghue
                     6 [Phylum Marattiophyta Heintze (1927) [monotypic]] see Division Monilophyta Cantino & Donoghue
                     7 [Phylum †Botryopteridiophyta Doweld (2001)] see Division Monilophyta Cantino & Donoghue
                     8 [Phylum Ophioglossophyta Doweld (2001)]
                     9 [Phylum Pteridophytaᵀ Schimp. (1879)] see Phylum Filicinophyta