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 Mediophyceae Medlin & Kaczmarska (2004) [paraphyletic] - bipolar centrics
                                           Order Hemiaulales Round & R.M. Crawford (1990)
                                             Family Hemiaulaceaeᵀ Heib. (1863)
                                               01 Genus †Cylindrospira Mitlehner (1995)
                                               02 Genus Abas R. Ross & P.A. Sims (1980)
                                               03 Genus Ailuretta P.A. Sims (1986)
                                               04 Genus Baxteriopsis G. Karst. (1928)
                                               05 Genus Briggera R. Ross & P.A. Sims (1985)
                                               06 Genus Cerataulina H. Perag. ex F. Schütt (1896)
                                               07 Genus Climacodium Grunow (1868)
                                               08 Genus Eucampia Ehrenb. (1839)
                                               09 Genus Hemiaulusᵀ Heib. (1863)
                                               09.0 [Genus Hemiaulus Ehrenb. (1844)]
                                               10 Genus Keratophora Pant. (1889)
                                               11 Genus Kittonia E. Grove & G. Sturt (1887)
                                               12 Genus Pseudorutilaria Grove & Sturt (1886)
                                               13 Genus Riedelia Jousé & Shesh.-Por. (1971), nom. illeg.
                                               13.0 [Genus "Riedelta"] see Genus Riedelia Jousé & Shesh.-Por. (1971), nom. illeg.
                                               14 Genus Sphynctolethus Hanna (1927)
                                               15 Genus Strelnikovia R. Ross & P.A. Sims (1985)
                                               16 Genus Trinacria Heib. (1863)