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) 1 Order Eunotiales P.C.Silva (1962)