Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Biota
           "neomura"
             Domain Eukaryota Chatton, 1925 - eukaryotes
               neokaryotes Cavalier-Smith 1993 - mitochondrial eukaryotes
                 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 Khakista Caval.-Sm. (2000)
                                 Diatomea Kütz. (1844)
                                   [Class] Bacillariophyceae Haeckel (1878) - pennates
                                     Subclass Bacillariophycidaeᵀ D.G. Mann (1990) - raphid diatoms
                                       [Order Amphorales] see Order Thalassiophysales D.G. Mann (1990)
                                         1 [Family Amphoraceaeᵀ] see Family Catenulaceae Mereschk. (1902)