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 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
                             [crown] 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 Urneidophycidae Medlin (2016) - basal araphid diatoms
                                             Order Plagiogrammales Gogorev & Stepanova (2015) [monotypic]
                                               Family Plagiogrammaceaeᵀ De Toni (1890)
                                                 1 Genus Plagiogrammaᵀ Grev. (1859)
                                                 2 Genus Dimeregramma Ralfs (1861)
                                                 3 Genus Glyphodesmis Grev. (1862)
                                                 4 Genus Neofragilaria T.V. Desikachary, A.K.S.K. Prasad & P. Prema (1987)
                                                 5 Genus Talaroneis W.H.C.F. Kooistra & M. De Stefano (2004)
                                                 6 Genus Psammogramma S. Sato & Medlin (2008)
                                                 7 Genus Psammoneis S. Sato, Kooistra & Medlin (2008)
                                                 8 Genus Orizaformis Witkowski, Chunlian Li & Ashworth (2015)