Division Bacillariophyta Engl. & Gilg (1919) see Phylum Bacillariophyta Engl. & Gilg (1919)
   Class Bacillariophyceae Haeckel (1878) - pennates
     Subclass Eunotiophycidae D.G.Mann (1990) see Subclass Bacillariophycidae D.G.Mann (1990)
       Order Eunotiales P.C.Silva (1962)
         1 Family Eunotiaceae Kütz. (1844)
         2 Family Peroniaceae (Karsten) Topachevs'kyj & Oksiyuk (1960)