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 Rhizaria Cavalier-Smith, 2002
                                 Phylum Retaria Cavalier-Smith, 2002
                                   Subphylum Radiozoa Cavalier-Smith, 1987
                                     Superclass Polycystinia Ehrenberg, 1838
                                       Class Nassellaria Ehrenberg, 1847
                                         Order Cyrtidinata Haeckel, 1862
                                           Superfamily Eucyrtidioidea Ehrenberg, 1847
                                             01 Family Eucyrtidiidaeᵀ Ehrenberg, 1847
                                             02 Family †Planispinocyrtidae Kozur & Mostler, 1981
                                             03 Family †Ruesticyrtiidae Kozur & Mostler, 1979
                                             04 Family †Pseudodictyomitridae Pessagno, 1977
                                             05 Family †Eucyrtidiellidae Takemura, 1986 [monotypic]
                                             06 Family †Obeliscoitidae O'Dogherty, 1994
                                             07 Family †Xitidae Pessagno, 1977
                                             08 Family †Williriedellidae Dumitrica, 1970
                                             09 Family Carpocaniidae Haeckel, 1881
                                             10 Family Artostrobiidae Riedel, 1967
                                             11 Family Pterocoryidae Haeckel, 1881
                                             12 Family Lophocyrtiidae Sanfilippo & Caulet, 2001