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Paraphyletic taxon: Order Zygnematales - filamentous conjugates and saccoderm desmids (alga)
Classification by:

Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         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)
                               Clade Phragmoplastophyta Lecointre & Le Guyader 2006 [Hall, McCourt, Delwiche, Mishler & Karol 2020]
                                 Phylum Charophyta Migula (1889) [monotypic]
                                   Genus †Baccinellula Weyland (1963), incertae sedis
                                   Genus †Closterimopsis L.M. Yin & Z.P. Li (1978), incertae sedis
                                   Genus †Desmidopsis L.M. Yin & Z.P. Li (1978), incertae sedis
                                   Genus †Paleospiralis incertae sedis
                                   Genus †Spirogyrites Shukla (1950), incertae sedis
                                   Genus †Stenixys T.M.Harris (1938), incertae sedis
                                   Genus Astrocosmium Stockmayer (1888), incertae sedis
                                   Genus Didymidium P.F. Reinsch (1867), incertae sedis
                                   Genus Phycastrum Kützing ex Kützing (1849), incertae sedis
                                   Genus Phycoleda Itzigs. (1854), incertae sedis
                                   Genus Polysolenia C.G. Ehrenberg ex F.T. Kützing (1849), incertae sedis
                                   Genus Schizospora P.F. Reinsch, 1874-1875, incertae sedis
                                   Order Desmidiales - placoderm desmids
                                   Order Zygnematales [paraphyletic] - filamentous conjugates and saccoderm desmids
                                     1 Family Zygnemataceae (Meneghini) Kützing (1843) [polyphyletic]
                                     2 Family Mesotaeniaceae [polyphyletic]

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Last updated: 21 Sep 2025