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 Collodaria Haeckel, 1881 [monotypic]
                                         Order Collodaridaᵀ Haeckel, 1881
                                           Family Collosphaeridae Müller, 1858
                                             Genus Acrosphaera Haeckel, 1881
                                               Acrosphaera spinosa (Haeckel, 1862)
                                                 Acrosphaera spinosa coniculispina K. Takahashi, 1991
                                                 Acrosphaera spinosa coronula K. Takahashi, 1991
                                                 Acrosphaera spinosa longispina K. Takahashi, 1991
                                                 1 †Acrosphaera spinosa echinoides (Haeckel, 1862)
                                                 2 Acrosphaera spinosa spinosaᵀ (Haeckel)