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 Lycopodiobiotina Doweld (2001)]
                   [Phylum Isoëtophyta Doweld (2001)]
                     [Subphylum Selaginellophytina Doweld (2001) [monotypic]]
                       1 [Class Selaginellopsidaᵀ A.B.Frank (1874)] see Class Isoëtopsida Rolle (1884)