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 Bigyra Cavalier-Smith, 1998
                                     Subphylum Opalozoa Cavalier-Smith, 1992
                                       [Class "Bicosoecophyceae" Loeblich III & Loeblich (1979), nom. nud.] see Order Bicosoecida Grassé, 1926
                                         [Order Bicosoecalesᵀ Grassé (1926)] see Order Bicosoecida Grassé, 1926
                                           1 [Family Bicosoecaceaeᵀ F. Stein (1878)] see Family Bicosoecidae Stein, 1878
                                           2 [Family Cafeteriaceae Moestrup (1995)] see Family Cafeteriidae Moestrup, 1995
                                           4 [Family Siluaniaceae Karpov (1998)] see Family Siluaniidae Karpov, 1998
                                           5 [Family Pseudodendromonadaceae D.J. Patt. & Zölffel (1991)] see Family Pseudodendromonadidae Patterson & Zölffel, 1991