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 Rhizosoleniophycidae Round & R.M. Crawford (1990)
      Count: [f] 1o;3f;10g
         Order Rhizosoleniales P.C.Silva (1962)
        Count: [f] 3f;10g
           ?Family Acanthoceraceae (R.M. Crawford, 1990) see Family Acanthocerataceae R.M. Crawford & Round (1990)
          Count: 1g
             Genus Acanthoceros see Genus Acanthoceras Honigm. (1909)
            Count: -