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]
           neomura Cavalier-Smith, 1987
             Eukaryota Chatton, 1925 - eukaryotes
               discaria Cavalier-Smith, 2021
                 natates Cavalier-Smith, 2021
                   photaria Cavalier-Smith, 2021
                     eucorta Cavalier-Smith, 2021
                       [node-based clade] Corticata Lankester, 1878 - corticates
                         Chromista Caval.-Sm. (1981) - chromists
                           Harosa Cavalier-Smith, 2010
                             [crown clade] Sar Adl et al. 2012 [Simpson & Dunthorn 2020]
                               Halvaria Cavalier-Smith, 2010
                                 Heterokonta Caval.-Sm. (1986)
                                   Ochrophyta Caval.-Sm. (1995)
                                     Khakista Caval.-Sm. (2000)
                                       Diatomea Kütz. (1844)
                                         Bacillariophyceae Haeckel (1878) - pennates
                                           Bacillariophycidae D.G.Mann (1990) - raphid diatoms
                                             Cymbellales D.G.Mann (1990)
                                               Rhoicospheniaceae Chen & Zhu (1983)
                                                 Cuneolus Giffen (1970)