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 Alveolata Cavalier-Smith, 1991
                                   Phylum Ciliophora Doflein, 1901 - ciliates
                                     Subphylum Intramacronucleata Lynn, 1996 - amphiesmates
                                       Class Litostomatea Small & Lynn, 1981
                                         Subclass Haptoria Corliss, 1974
                                           Order Haptoridaᵀ Corliss, 1974
                                             Family Didiniidae Poche, 1913
                                               1 Genus Cyclotrichium Meunier, 1910
                                               2 Genus Didiniumᵀ Stein, 1859
                                               3 Genus Dinophrya Bütschli, in Bronn, 1889
                                               4 Genus Liliimorpha Gajewskaja, 1928
                                               5 Genus Monodinium Fabre-Domergue, 1888
                                               6 Genus Zonotrichium Meunier, 1910
                                               7 Genus Choanostoma Wang, 1931, nom. dub.
                                               8 Genus "Astrostoma" Alekperov, in Corliss, 1979, nom. nud., nom. illeg.