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
                                             01 Family Pseudoholophryidae Berger et al., 1984
                                             02 Family Didiniidae Poche, 1913
                                             03 Family Pseudotrachelocercidae Song, 1990
                                             04 Family Actinobolinidae Kahl, 1930
                                             05 Family Tracheliidae Ehrenberg, 1838
                                             06 Family Helicoprorodontidae Small & Lynn, 1985
                                             07 Family Pleuroplitidae Foissner, 1996
                                             08 Family Lacrymariidae de Fromentel, 1876
                                             09 Family Homalozoonidae Jankowski, 1980
                                             10 Family Enchelyidae Ehrenberg, 1838
                                             11.1 Family Acropisthiidae Foissner & Foissner, 1988
                                             11.2 Family Fuscheriidae Foissner et al., 2002
                                             12 Family Spathidiidae Kahl, 1929
                                             13.1 Family Trachelophyllidae Kent, 1882
                                             13.2 Family Enchelyodontidae Foissner et al., 2002