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)]
                   [Superdivision Pteridophytanae Doweld (2001)] see Superphylum Pteridophytanae Doweld (2001)
                     [Division Monilophyta Cantino & Donoghue]
                       [Class Equisetopsida C.Agardh (1825) - horsetails] see Subclass Equisetidae Warm. (1883)
                         [Order †Calamitales Eichwald (1852)] see Order Equisetales DC. ex Bercht. & J.Presl (1829)
                           [Family †Kallostachyaceae Doweld (2001) [monotypic]] see Family Calamostachyaceae S.V.Meyen (1978), nom. cons. prop.