Division Bacillariophyta Engl. & Gilg (1919) see Phylum Bacillariophyta Engl. & Gilg (1919)
   Class Bacillariophyceae Haeckel (1878) - pennates
     Subclass Bacillariophycidae D.G.Mann (1990) - raphid diatoms
       Order Cymbellales D.G.Mann (1990)
         Family Gomphonemataceae Kütz. (1844)
           1 Genus Gomphonema Ehrenb. (1832)
           2 Genus Didymosphenia Mart. Schmidt (1899)
           3 Genus Gomphoneis Cleve (1894)
           4 Genus Reimeria Kociolek & Stoermer (1987)
           5 Genus Gomphopleura Reichelt ex Tempère (1894)