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 Plantae Haeckel (1866) - plants
                           Subkingdom Viridiplantae Caval.-Sm. (1981) - green plants
                             Phylum Chlorophyta Pascher (1914) [coordinate rank] - green algae
                               "core chlorophytes"
                                 Class Trebouxiophyceae T. Friedl (1995) - trebouxiophytes
                                   Family Micractiniaceae G.M. Sm.
                                     ?Genus Phythelios Frenzel (1891)
                                     1 Genus Echinosphaeridium Lemmermann (1904) [monotypic]
                                     2 Genus Golenkiniopsis O. Korshikov (1953)
                                     3 Genus Micractiniumᵀ Fresenius (1858)
                                     n.1.0 [Genus "Acanthosphaeria"] see Genus Acanthosphaera Lemmermann (1899)