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 Halvaria Cavalier-Smith, 2010
                                 Superphylum Heterokonta Caval.-Sm. (1986)
                                   Phylum Ochrophyta Caval.-Sm. (1995)
                                     Subphylum Phaeista Caval.-Sm. (1995)
                                       Infraphylum Marista Caval.-Sm. (2006)
                                         Superclass Raphidoistia Caval.-Sm. (1986) [monotypic]
                                           Class Raphidophyceaeᵀ Chadef. ex P.C.Silva (1980) - raphidophytes
                                             Subclass Raphopoda Cavalier-Smith, 2013
                                               Order Actinophryida Hartmann, 1913 [monotypic]
                                                 Suborder Actinosphaerina Cavalier-Smith, 2013 [monotypic]
                                                   Family Actinosphaeriidae Schulze, 1877
                                                     Genus Actinosphaeriumᵀ Stein, 1857
                                                       [Actinosphaerium capillaceum]
                                                       [Actinosphaerium portuum Kufferath, 1952]
                                                       -1 [Actinosphaerium nucleofilum Barrett, 1958] see Echinosphaerium nucleofilum (Barrett, 1958) Hovasse, 1965
                                                       1 Actinosphaerium eichhorniiᵀ (Ehrenberg, 1840) Stein, 1857
                                                       1.0 [Actinosphaerium arachnoideum Penard, 1904] see Actinosphaerium eichhornii (Ehrenberg, 1840) Stein, 1857
                                                       1.0 ["Actinosphaerium eichhorni" Ehr.] see Actinosphaerium eichhornii (Ehrenberg, 1840) Stein, 1857
                                                       2 Actinosphaerium akamae (Shigenaka, Watanabe & Suzaki, 1980)
                                                       2.0 [Actinosphaerium akamae (Shigenaka, Watanabe & Suzaki, 1980), nom. dub.]
                                                       3 Actinosphaerium ikachiensis (Shigenaka et al., 1980)