eukaryotes see Domain Eukaryota Chatton, 1925
   Superkingdom Corticata Lankester, 1878 - corticates
     Kingdom Chromista Caval.-Sm. (1981) - chromists
       Subkingdom Hacrobia Okamoto, Chantangsi, Horák, Leander & Keeling, 2009
         Phylum Haptista Cavalier-Smith, 2003
           Subphylum Heliozoa Haeckel (1866) [monotypic]
             Class Centrohelea Kühn, 1926
               1 Genus Oxnerella Dobell, 1917
               2 Genus Polyplacocystis Mikrjukov, 1996
               3 Genus Acanthocystis Carter, 1863
               4 Genus Raphidiophrys Archer, 1867