Division Bacillariophyta Engl. & Gilg (1919) see Phylum Bacillariophyta Engl. & Gilg (1919)
   Class Bacillariophyceae Haeckel (1878) - pennates
     Subclass Bacillariophycidae D.G.Mann (1990) - raphid diatoms
       Order Rhopalodiales D.G.Mann (1990)
         Family Rhopalodiaceae (Karsten) Topachevs'kyj & Oksiyuk (1960)
           1 Genus Epithemia Bréb. ex Kütz. (1844)
           2 Genus Rhopalodiaᵀ O.Müll. (1895)
           3 Genus Protokeelia