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 neokaryotes Cavalier-Smith 1993 - mitochondrial eukaryotes
                 Clade neozoa Cavalier-Smith 1993
                   Superkingdom Corticata Lankester, 1878
                     Kingdom Plantae Haeckel (1866) - plants
                       Subkingdom Viridiplantae Caval.-Sm. (1981) - green plants
                         Infrakingdom Streptophyta C. Jeffrey (1967)
                           Superphylum Charophyta Migula (1890) [monotypic]
                             Phylum Charophytaᵀ Rabenhorst (1863) [paraphyletic]
                               Class Conjugatophyceae sedis mutabilis
                                 Order Zygnematales [paraphyletic] - filamentous conjugates and saccoderm desmids
                                   Family Zygnemataceaeᵀ (Meneghini) Kützing (1843) [polyphyletic]
                                     01 Genus Transeauina Guiry (2013)
                                     02 Genus Lloydina A. Ahmad & M. Goldstein (1972) [monotypic]
                                     03 Genus Mougeotia C. Agardh (1824), nom. cons.
                                     04 Genus Mougeotiella Yamagishi (1963)
                                     05 Genus Mougeotiopsis Palla (1894) [monotypic]
                                     06 Genus Neozygnema Yamagishi (1963) [monotypic]
                                     07 Genus Sangirellum A.K. Mahato & P. Mahato (1994) [monotypic]
                                     08 Genus Sirocladium Randhawa (1941)
                                     09.1 Genus Spirogyra Link (1820), nom. cons.
                                     09.2 Genus Sirogonium Kütz. (1843), nom. cons.
                                     10 Genus Temnogametum West & G.S. West (1897)
                                     11 Genus Temnogyra I.F. Lewis (1925)
                                     12 Genus Trigonum A.K. Mahato & P. Mahato (1994) [monotypic]
                                     13.1 Genus Zygnemaᵀ C. Agardh (1817), nom. cons.
                                     13.2 Genus Pleurodiscus Lagerh. (1895)
                                     14 Genus Zygnemopsis (Skuja) Transeau (1934)
                                     15 Genus Zygogonium Kütz. (1843), nom. cons.