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
                             Infrakingdom Streptophyta Caval.-Sm. (1993)
                               [crown] Clade Phragmoplastophyta Lecointre & Le Guyader 2006 [Hall, McCourt, Delwiche, Mishler & Karol 2020]
                                 Phylum Charophytaᵀ Migula (1889) [monotypic]
                                   Order Zygnematales [paraphyletic] - filamentous conjugates and saccoderm desmids
                                     Family Mesotaeniaceae [polyphyletic]
                                       1 ?Genus Spirotaenia Bréb. ex Ralfs (1848)
                                       2 Genus Ancylonema Berggr. (1871) [monotypic]
                                       3 Genus Cylindrocystis Meneghini ex de Bary (1858)
                                       4 Genus Geniculus Prescott (1967) [monotypic]
                                       5 Genus Mesotaeniumᵀ Nägeli (1849)
                                       6.1 Genus Netrium (Nägeli) Itzigs. & Rothe (1856)
                                       6.2 Genus Nucleotaenium A.A. Gontcharov & M. Melkonian (2010)
                                       6.3 Genus Planotaenium (Ohtani) Petlovany & Palamar-Mordvintseva (2009)
                                       7 Genus Roya West & G.S.West (1896)
                                       8 Genus Tortitaenia (Brook) Brook