Division Bacillariophyta Engl. & Gilg (1919) see Phylum Bacillariophyta Engl. & Gilg (1919)
Count: [*] 3c;39o
   Subdivision Coscinodiscophytina Medlin & Kaczmarska (2004) [monotypic] see Subphylum Coscinodiscophytina Medlin & Kaczmarska (2004)
  Count: [*] 1c;13o
     Class Coscinodiscophyceae Round & R.M. Crawford (1990) - radial centrics
    Count: [*] 13o
       Order Ethmodiscales Round (1990)
      Count: -