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 Phyllopharyngea de Puytorac et al., 1974
                                         Subclass Suctoria Claparède & Lachmann, 1858 - suctorians
                                           Order Exogenida Collin, 1912
                                             01 Family Phalacrocleptidae Kozloff, 1966 [monotypic]
                                             02 Family Stylostomatidae Batisse, 1975
                                             03 Family Rhabdophryidae Jankowski, 1970
                                             04 Family Ophryodendridae Stein, 1867
                                             05 Family Spelaeophryidae Jankowski, in Batisse, 1975
                                             06 Family Ephelotidae Kent, 1882
                                             07 Family Parapodophryidae Jankowski, 1973
                                             08 Family Podophryidae Haeckel, 1866
                                             09 Family Tachyblastonidae Grell, 1950 [monotypic]
                                             10 Family Metacinetidae Bütschli, 1889
                                             11 Family Thecacinetidae D. Matthes, 1956
                                             12 Family Paracinetidae Jankowski, 1978
                                             13 Family Urnulidae Fraipont, 1878
                                             14 Family Corynophryidae Jankowski, 1981