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 Fragilariophyceae Round (1990) - araphid, pennate diatoms see Class Bacillariophyceae Haeckel (1878)
    Count: 10o;13f;35g
       Subclass Fragilariophycidae Round (1990) - core araphid diatoms
      Count: [f] 10o;13f;35g
         Order Rhaphoneidales Round (1990)
        Count: [f] 2f;7g
           Family Rhaphoneidaceae Forti (1912)
          Count: 6g
             Genus Sceptroneis Ehrenb. (1844)
            Count: -