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 Sphaerellaria Haeckel, 1881
                                         Order Hexalonchata Haeckel, 1881
                                           Family Hexalonchidaeᵀ Haeckel, 1881
                                             Genus Hexacontium Haeckel, 1881
                                               01 Hexacontium arachnoidale Hollande, 1960
                                               02 Hexacontium aristarchi (Haeckel, 1887)
                                               03 †Hexacontium armatum/hostile group
                                               04 Hexacontium asteracanthion (Haeckel, 1860)
                                               05 Hexacontium axotrias Haeckel, 1887
                                               06 Hexacontium enthacanthum Jørgensen, 1900
                                               07 Hexacontium gigantheum Cortese & Bjørklund, 1998
                                               08 Hexacontium heracliti (Haeckel, 1887)
                                               09 †Hexacontium hexactis (Stöhr, 1880)
                                               10 †Hexacontium hootsi Campbell & Clark, 1944
                                               11 Hexacontium hystricina (Haeckel, 1887)
                                               12 Hexacontium laevigatum Haeckel, 1887
                                               13 Hexacontium melpomene (Haeckel, 1887)
                                               14 Hexacontium pachydermum Jørgensen, 1900
                                               15 †Hexacontium palaeocenicum Sanfilippo & Riedel, 1973