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 Spirotrichea Bütschli, 1889
                                         Subclass Choreotrichia Small & Lynn, 1985
                                           Order Tintinnida Kofoid & Campbell, 1929
                                             Family Metacylididae Kofoid & Campbell, 1929
                                               01 ?Genus Rhizodomus Strelkov & Virketis, 1950
                                               02 ?Genus Stylicauda Balech, 1951
                                               03 Genus †Favelloides Colom, 1939
                                               04 Genus †Rhabdonelloides Colom, 1939
                                               05 Genus †Spiroxystonellites Knauer, 1969
                                               06 Genus Climacocylis Jørgensen, 1925
                                               07 Genus Coxliella Brandt, 1908[1907]
                                               08 Genus Helicostomella Jörgensen, 1924
                                               09 Genus Metacylisᵀ Jörgensen, 1924
                                               10 Genus Pseudometacylis Balech, 1968