Kingdom Protoctista Hogg, 1860
Count: [p] 36p;91c;87o;183f;507g;35s;2v
   Phylum Bacillariophyta Engl. & Gilg (1919) - diatoms see [unranked] Diatomea Kütz. (1844)
  Count: [f] 4c;41o;83f;204g
     Class Coscinodiscophyceae Round & R.M. Crawford (1990) - radial centrics
    Count: 20o;33f;85g
       Subclass Chaetocerophycidae see Subclass Chaetocerotophycidae Round & R.M. Crawford (1990)
      Count: [f] 2o;2f;3g
         Order Chaetocerotales Round & R.M. Crawford (1990)
        Count: [f] 1f;2g
           Family Chaetocerotaceae Ralfs (1861)
          Count: 2g
             Genus Chaetoceros Ehrenb. (1844)
            Count: -