Kingdom Protoctista Hogg, 1860
   Phylum Bacillariophyta Engl. & Gilg (1919) - diatoms see [unranked] Diatomea Kütz. (1844)
     Class Bacillariophyceae Haeckel (1878) - pennates
       Subclass Bacillariophycidae D.G.Mann (1990) - raphid diatoms
         Order Achnanthales P.C.Silva (1962)
           Family Cocconeidaceae Kütz. (1844)
             1 Genus Cocconeis Ehrenb. (1838)
             2 Genus Campyloneis Grunow (1862)
             3 Genus Anorthoneis Grunow (1868)
             4 Genus Bennettella R.W. Holmes (1985)
             5 Genus Epipellis R.W. Holmes (1985)