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 Oligohymenophorea de Puytorac et al., 1974 - oligohymenophoreans
                                         Subclass Scuticociliatia (E.B. Small, 1967)
                                           Order Thigmotrichida Chatton & Lwoff, 1922
                                             Family Hysterocinetidae Diesing, 1866
                                               Genus Coelothigma de Puytorac, 1968
                                               Genus Cotylothigma Raabe, 1949
                                               Genus Craticuloscuta Kozloff, 1965
                                               Genus Drilocineta Raabe, 1972
                                               Genus Elliptothigma Meier, 1954
                                               Genus Eminothigma Jankowski, in Corliss, 1979
                                               Genus Epicharocotyle Kozloff, 1965
                                               Genus Hysterocinetaᵀ Diesing, 1866
                                               Genus Hysterocinetoides Ngassam & Grain, 2002
                                               Genus Kozloffia de Puytorac, 1968
                                               Genus Kysthothigma Raabe, 1949
                                               Genus Preptychostomum de Puytorac, 1968
                                               Genus Protoptychostomum Raabe, 1949
                                               Genus Ptychostomum Stein, 1860
                                               Genus Raabellocineta de Puytorac et al., 1979
                                               Genus Taeniocineta Raabe, 1972
                                               Genus Thurstonia de Puytorac, 1968