Class Conjugatophyceae Engl. (1892) see Class Zygnematophyceae Round ex Guiry (2013)
   Order Zygnematales - filamentous conjugates and saccoderm desmids
     Family Zygnemataceae (Meneghini) Kützing (1843)
       Genus Mougeotia C.Agardh (1824), nom. cons.
         1 Mougeotia genuflexa (Dillwyn) C.Agardh
         2 Mougeotia capucina C.Agardh
         3 Mougeotia notabilis Hassall
         4 Mougeotia calcarea (Cleve) Wittrock