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 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
                                             Family †Williriedellidae Dumitrica, 1970
                                               01 Genus †Complexapora Kießling & Zeiss, 1992
                                               02 Genus †Cryptamphorella Dumitrica, 1970
                                               03 Genus †Cryptocephalus Haeckel, 1881, nom. illeg.
                                               04 Genus †Excentropylomma Dumitrica, 1970
                                               05 Genus †Hemicryptocapsa Tan, 1927
                                               06 Genus †Holocryptocanium Dumitrica, 1970
                                               07 Genus †Holocryptocapsa Tan, 1927
                                               08 Genus †Kozurium Pessagno, 1977
                                               09 Genus †Williriedellumᵀ Dumitrica, 1970
                                               10 Genus †Zhamoidellum Dumitrica, 1970