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 Intramacronucleata Lynn, 1996 - amphiesmates
                                       Class Phyllopharyngea de Puytorac et al., 1974
                                         Subclass Suctoria Claparède & Lachmann, 1858 - suctorians
                                           Order Evaginogenida Jankowski, 1978
                                             Family Discophryidae Collin, 1912
                                               1 Genus Cyclophrya Gönnert, 1935
                                               2 Genus Dactylostoma Jankowski, 1967 [monotypic]
                                               3.1 Genus Discophryaᵀ Lachmann, 1859
                                               3.2 Genus Anarma Goodrich & Jahn, 1943
                                               3.3 Genus Caracatharina Kormos, in Corliss, 1960
                                               4 Genus Echinophrya Swarczewsky, 1928
                                               5 Genus Periacineta Collin, 1909
                                               6 Genus Peridiscophrya Nozawa, 1938
                                               7 Genus Prodiscophrya Kormos, 1935
                                               8 Genus Rhynchophrya Collin, 1909
                                               9 Genus Testudinicola Jankowski, 1978