Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         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
                             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 Postciliodesmatophora Gerassimova & Seravin, 1976 - desmates
                                       Class Heterotrichea Stein, 1859 [monotypic]
                                         Order Heterotrichidaᵀ Stein, 1859 - heterotrichs
                                           "stentorids"
                                             Family Folliculinidae Dons, 1914
                                               Genus Metafolliculina Dons, 1925[1924]
                                                 Metafolliculina andrewsi Hadzi, 1938
                                                 Metafolliculina ballerina Mulisch, Harry, Patterson & Wyatt, 1986
                                                 Metafolliculina gunneri
                                                 Metafolliculina limnoria
                                                 Metafolliculina nordgardiᵀ Dons, 1924
                                                 Metafolliculina producta (Wright, 1859) ?