Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         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 discaria Cavalier-Smith, 2021
                 Clade natates Cavalier-Smith, 2021
                   Clade photaria Cavalier-Smith, 2021
                     Clade eucorta Cavalier-Smith, 2021
                       Superkingdom Corticata Lankester, 1878 - corticates
                         Kingdom Chromista Caval.-Sm. (1981) - chromists
                           Subkingdom Harosa Cavalier-Smith, 2010
                             Clade Sar Adl et al. 2012 [Simpson & Dunthorn 2020]
                               Infrakingdom Halvaria Cavalier-Smith, 2010
                                 Superphylum Heterokonta Caval.-Sm. (1986)
                                   Phylum Ochrophyta Caval.-Sm. (1995)
                                     Subphylum Khakista Caval.-Sm. (2000)
                                       Diatomea Kütz. (1844)
                                         Class Bacillariophyceae Haeckel (1878) - pennates
                                           Subclass Fragilariophycidae Round (1990) - core araphid diatoms
                                             Order Fragilarialesᵀ P.C.Silva (1962) [monotypic]
                                               Family Fragilariaceaeᵀ Grev. (1833)
                                                 Genus Echinella Lyngbye (1819)
                                                 Genus Psammosynedra Round (1993)
                                                 Genus Synedropsis Hasle, Medlin & Syvertsen (1994)
                                                 01 Genus Asterionella Hassall (1850)
                                                 02 Genus Bleakeleya Round (1990) [monotypic]
                                                 03 Genus Catacombas D.M. Williams & Round (1986)
                                                 04 Genus Centronella Max Voigt (1902)
                                                 05 Genus Ceratoneis Ehrenb. (1839)
                                                 06 Genus Ctenophora (Grunow) Williams & Round (1986)
                                                 07 Genus Diatoma Bory (1824)
                                                 08 Genus Distrionella D.M. Williams (1990)
                                                 09 Genus Falcula
                                                 10 Genus Fragilariaᵀ Lyngb. (1819)
                                                 11 Genus Fragilariforma D.M. Williams & F.E. Round (1988)
                                                 12 Genus Hannaea R.M. Patrick (1966)
                                                 13 Genus Hyalosynedra D.M. Williams & Round (1986)
                                                 14 Genus Martyana Round (1990)
                                                 15 Genus Meridion C.Agardh (1824)
                                                 16 Genus Neosynedra D.M. Williams & Round (1986)
                                                 17 Genus Opephora P. Petit (1888)
                                                 18 Genus Podocystis Bailey (1854)
                                                 19 Genus Pseudostaurosira (Grunow) D.M. Williams & Round (1987)
                                                 20 Genus Pteroncola R.W. Holmes & Croll (1984)
                                                 21 Genus Punctastriata D.M. Williams & Round (1987)
                                                 22 Genus Staurosira (Ehrenb.) D.M. Williams & Round (1987)
                                                 23 Genus Staurosirella D.M. Williams & Round (1987)
                                                 24 Genus Synedra Ehrenb. (1830)
                                                 25 Genus Tabularia (Kütz.) D.M. Williams & Round (1986)
                                                 26 Genus Thalassioneis Round (1990) [monotypic]
                                                 27 Genus Trachysphenia P. Petit (1877)