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]
           [Superkingdom Eukarya Chatton, 1925] see Domain Eukaryota Chatton, 1925
             [Kingdom Protoctista Hogg, 1860]
               [Phylum Phaeophyta Kjellman (1891)] see Phylum Phaeophycota
                 1.0 [Class Melanophyceae Rabenhorst, 1863] see Class Phaeophyceae Hansgirg (1886)
                 1.1 [Class Isogeneratae] see Class Phaeophyceae Hansgirg (1886)
                 1.2 [Class Heterogeneratae] see Class Phaeophyceae Hansgirg (1886)
                 1.3 [Class Cyclosporae] see Class Phaeophyceae Hansgirg (1886)