Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade "neomura" Cavalier-Smith 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade neokaryotes Cavalier-Smith 1993 - mitochondrial eukaryotes
                 Clade neozoa Cavalier-Smith 1993
                   Superkingdom Corticata Lankester, 1878
                     Kingdom Chromista Caval.-Sm. (1981) - chromists
                       Subkingdom Harosa Cavalier-Smith, 2010
                         Infrakingdom Halvaria Cavalier-Smith, 2010
                           Superphylum Heterokonta Caval.-Sm. (1981)
                             Phylum Ochrophyta Caval.-Sm. (1995)
                               Subphylum Phaeista Caval.-Sm. (1995)
                                 Infraphylum Marista Caval.-Sm. (2006)
                                   Superclass Fucistia Caval.-Sm. (1995)
                                     1 Class Chrysomerophyceae Caval.-Sm. (1995) [monotypic]
                                     2.1.1 Class Xanthophyceae P. Allorge ex Fritsch (1935) - yellow-green algae
                                     2.1.2 Class Phaeothamniophyceae R.A. Andersen & J.C. Bailey (1998)
                                     2.2.1 Class Schizocladiophyceae Henry, Okuda & Kawai (2003) [monotypic]
                                     2.2.2 Class Phaeophyceae Hansgirg (1886) - brown algae