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 Hypotrichia (Stein, 1859) Cavalier-Smith, 1993
                                           Order Euplotida Small & Lynn, 1985
                                             Suborder Discocephalina Wicklow, 1982
                                               Family Discocephalidaeᵀ Jankowski, 1979
                                                 1 Genus Psammocephalus Wicklow, 1982
                                                 2 Genus Marginotricha Jankowski, 1978
                                                 3 Genus Prodiscocephalus Jankowski, 1979
                                                 4 Genus Discocephalusᵀ Ehrenberg, 1831