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 Mediophyceae Medlin & Kaczmarska (2004) [paraphyletic] - bipolar centrics
                                           Order Thalassiosirales Glezer & I.V. Makarova (1986)
                                             Family Stephanodiscaceae Glezer & Makarova (1986)
                                               Genus Stephanodiscusᵀ Ehrenb. (1845)
                                                 Stephanodiscus aegyptiacus Ehrenberg (1854)
                                                 Stephanodiscus agassizensis Håkansson & Kling (1989)
                                                 Stephanodiscus alpinus Hustedt, in Hub.-Pest. (1942)
                                                 Stephanodiscus astraea (Ehrenberg) Grunow, in Cleve & Grunow (1880)
                                                 Stephanodiscus berolinensis Ehrenberg (1846)
                                                 Stephanodiscus binderanus (Kützing) Krieger (1927)
                                                 Stephanodiscus excentricus Hustedt (1952)
                                                 Stephanodiscus galileensis Håkansson & Ehrlich (1987)
                                                 Stephanodiscus hantzschii Grunow, in Cleve & Grunow (1880)
                                                 Stephanodiscus heterostylus Håkansson & Meyer (1994)
                                                 Stephanodiscus irregularis Druart, Reymond Pelletier & Gasse (1987)
                                                 Stephanodiscus khurseviczae Likhoshway (1996)
                                                 Stephanodiscus medius Håkansson (1986)
                                                 Stephanodiscus minor Reverdin (1918)
                                                 Stephanodiscus minutulus (Kützing) Cleve & Moller (1878)
                                                 Stephanodiscus neoastraea Håkansson & Hickel (1986)
                                                 Stephanodiscus niagarae Ehrenberg (1846)
                                                 Stephanodiscus oregonicus (Ehrenberg) Håkansson (1986)
                                                 Stephanodiscus parvus Stoermer & Håkansson (1984)
                                                 Stephanodiscus rotula (Kützing) Hendey (1964)
                                                 Stephanodiscus subtilis (Goor) A.Cleve (1951)
                                                 Stephanodiscus transsylvanicus Pantocsek (1892)
                                                 Stephanodiscus vestibulis Håkansson, Theriot & Stoermer (1986)