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 †Botryopteridiophyta Doweld (2001)] see Division Monilophyta Cantino & Donoghue
                       [Class †Urnatopteridopsida Doweld (2001)] see Class Marattiopsida Doweld (2001)
                         [Order †Crossothecales Danzé ex Doweld (2001) [monotypic]] see Order Stauropteridales Emberger (1944)
                           1 [Family †Crossothecaceaeᵀ Doweld (2001), nom. cons. prop. [monotypic]] see Family Stauropteridaceae Hirmer (1927)