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 Spumellaria Ehrenberg, 1875
                                         Order Saturnalata Afanasieva & Amon, 2005
                                           Family Saturnalidaeᵀ Deflandre, 1953
                                             Subfamily †Heliosaturnalinae Kozur & Mostler, 1972
                                               1 Genus †Heliosaturnalisᵀ Kozur & Mostler, 1972
                                               2 Genus †Palaeosaturnalis Donofrio & Mostler, 1978
                                               3 Genus †Parasaturnalis Kozur & Mostler, 1972
                                               4 Genus †Praehexasaturnalis Kozur & Mostler, 1983
                                               5 Genus †Pseudoheliodiscus Kozur & Mostler, 1972
                                               6 Genus †Spongosaturnaloides Kozur & Mostler, 1972
                                               7 Genus †Stauracanthocircus Kozur & Mostler, 1983