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 Stauraxonaria Afanasieva & Amon, 2005
                                         Order Spongodiscata Haeckel, 1862
                                           Family Spongodiscidae Haeckel, 1862
                                             Genus Spongodiscusᵀ Ehrenberg, 1854
                                               01 †Spongodiscus hokkaidoensis (Taketani, 1982)
                                               02 †Spongodiscus cruciferus (Clark & Campbell, 1942)
                                               03 †Spongodiscus maculatus Clark & Campbell, 1945
                                               04 †Spongodiscus phrix Sanfilippo & Riedel, 1973
                                               05 †Spongodiscus pulcher Clark & Campbell, 1945
                                               06 †Spongodiscus quartus (Borisenko, 1958)
                                               07 †Spongodiscus rhabdostylus (Ehrenberg, 1873)
                                               08 †Spongodiscus ambus Sanfilippo, 1974
                                               09 †Spongodiscus craticulatus (Stöhr, 1880)
                                               10 †Spongodiscus gigas Campbell & Clark, 1944
                                               11 †Spongodiscus klingi Caulet, 1986
                                               12 Spongodiscus asiaensis Chen & Tan, 1989
                                               13 Spongodiscus mediterraneus Haeckel, 1862
                                               14.1 Spongodiscus resurgens Ehrenberg, 1854
                                               14.2 Spongodiscus biconcavus Haeckel, 1887
                                               15 Spongodiscus setosus (Dreyer, 1889)