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 Naviculales Bessey (1907)
         Suborder Diploneidineae D.G.Mann (1990)
           Family Diploneidaceae D.G.Mann (1990)
             1 Genus Diploneis Ehrenb. ex Cleve (1894)
             2 ?Genus Raphidodiscus H.L. Sm. ex Christian (1887)