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
                                   Order Oocystales
                                     Family Oocystaceaeᵀ Bohlin
                                       Genus Oocystella Lemmermann
                                         [Oocystella borgei (J. Snow) Hindák] see Oocystis borgei J. Snow
                                         [Oocystella lacustris (Chodat) Hindák] see Oocystis lacustris Chodat
                                         [Oocystella natans Lemmermann] see Oocystis natans (Lemmermann) Lemmermann (1908)
                                         [Oocystella parva (W. West & G.S. West) Hindák] see Oocystis parva W.West & G.S.West
                                         [Oocystella solitaria (Wittrock) Hindák] see Oocystis solitaria Wittrock, in Wittrock & Nordst.
                                         01 Oocystella bispora (Komárek) Hindák
                                         02 Oocystella carpatica Hindák
                                         03 Oocystella heteromucosa (Hegewald) Hindák
                                         04 Oocystella marssonii (Lemmermann) Hindák
                                         05 Oocystella nephrocytioides (Fott & Cado) Hindák
                                         06 Oocystella oogama F. Hindák
                                         07 Oocystella panduriformis (W.West & G.S.West) Hindák
                                         08 Oocystella piscinalis Hindák
                                         09 Oocystella radiosa Hindák
                                         10 Oocystella rhomboidea (Fott) Hindák
                                         11 Oocystella submarina (Lagerheim) Hindák
                                         12 Oocystella tainoensis (J. Komárek) F. Hindák