Division Bacillariophyta Engl. & Gilg (1919) see Phylum Bacillariophyta Engl. & Gilg (1919)
   Class Coscinodiscophyceae Round & R.M. Crawford (1990) - radial centrics
     Subclass Corethrophycidae Round & R.M. Crawford (1990)
       Order Corethrales Round & R.M. Crawford (1990)
         1 Family Corethraceae M. Lebour (1930)