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 Sellaphorineae D.G.Mann (1990)
           Family Pinnulariaceae D.G.Mann (1990)
             1 Genus Pinnulariaᵀ (Ehrenb.) Ehrenb. (1843)
             2 Genus Diatomella Grev. (1855)
             3 Genus Östrupia see Genus Oestrupia H. Heiden ex Hustedt (1935)
             4 Genus Dimidiata