living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Plantae Haeckel (1866) - plants
       Subkingdom Thallobionta
         Division Chlorophycota see Phylum Chlorophyta Pascher (1914)
           Class Chlorophyceae Wille (1884) - chlorophytes
             Order Zygnematales - filamentous conjugates and saccoderm desmids
               Suborder Zygnematineae see Order Zygnematales
                 Family Zygnemataceae (Meneghini) Kützing (1843)
                   Genus Debarya Wittr. (1872), nom. illeg. see Genus Transeauina Guiry (2013)
                   Genus Mougeotia C.Agardh (1824), nom. cons.
                   Genus Mougeotiopsis Palla (1894)
                   Genus Spirogyra Link (1820), nom. cons.
                   Genus Zygnema C.Agardh (1817), nom. cons.
                   Genus Zygogonium Kütz. (1843), nom. cons.