1 Natura - nature
   2.1 actualia - actual entities
     2 Mundus Plinius - physical world
       3 naturalia - natural bodies
         2 Biota
           3.2 Domain Eukaryota Chatton, 1925 - eukaryotes
             2 Bikonta
               2 Diaphoretickes Adl et al., 2012
                 3 Kingdom Plantae Haeckel, 1866 - plants
                   Genus †Sphenolepis Schenk, 1871
                   1 Phylum Glaucophyta Skuja, 1954
                   2.1 Phylum Rhodophyta Wettstein, 1922 - red algae
                   2.2 Viridiplantae Cavalier-Smith, 1981 - green plants