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 Bacillariophyceae Haeckel (1878) - pennates
    Count: 11o;37f;84g
       Subclass Bacillariophycidae D.G.Mann (1990) - raphid diatoms
      Count: [f] 10o;35f;79g
         Order Epithemiales see Order Rhopalodiales D.G.Mann (1990)
        Count: [f] 3f;4g
           Family Epithemiaceae see Family Rhopalodiaceae (Karsten) Topachevs'kyj & Oksiyuk (1960)
          Count: 2g
             1 Genus Epithemia Bréb. ex Kütz. (1844)
            Count: -
             2 Genus Rhopalodia O.Müll. (1895)
            Count: -