Division Bacillariophyta Engl. & Gilg (1919) see Phylum Bacillariophyta Engl. & Gilg (1919)
Status: extant
   Class Bacillariophyceae Haeckel (1878) - pennates
  Status: extant
     Subclass Bacillariophycidae D.G.Mann (1990) - raphid diatoms
    Status: extant
       Order Naviculales Bessey (1907)
      Status: extant
         Suborder Sellaphorineae D.G.Mann (1990)
        Status: extant
           Family Pinnulariaceae D.G.Mann (1990)
          Status: extant
             1 Genus Pinnulariaᵀ (Ehrenb.) Ehrenb. (1843)
            Status: extant
             2 Genus Diatomella Grev. (1855)
            Status: extant
             3 Genus Östrupia see Genus Oestrupia H. Heiden ex Hustedt (1935)
            Status: extant
             4 Genus Dimidiata
            Status: extant