Class Conjugatophyceae Engl. (1892) see Class Zygnematophyceae Round ex Guiry (2013)
   Order Zygnematales - filamentous conjugates and saccoderm desmids
     Family Mesotaeniaceae
       Genus Netrium (Nägeli) Itzigs. & Rothe (1856)
         1 Netrium digitus (Ehrenb.) Itzigs.