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 Oligohymenophorea de Puytorac et al., 1974 - oligohymenophoreans
                                         Subclass Peniculia Fauré-Fremiet, 1956
                                           Order Peniculidaᵀ Fauré-Fremiet, 1956
                                             Family Frontoniidae Kahl, 1926
                                               1 ?Genus Schistophrya Kahl, 1933
                                               2 ?Genus Sigmostomum Gulati, 1925
                                               3 Genus Didieria Small & Lynn, 1985
                                               4.1 Genus Disematostoma Lauterborn, 1894
                                               4.2 Genus Wenrichia Jankowski, 1967
                                               5.1 Genus Frontoniaᵀ Ehrenberg, 1838
                                               5.2 Genus Frontoniella Wetzel, 1927
                                               6 Genus Paraclathrostoma Small & Lynn, 1985