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) Family Eunotiaceae Kütz. (1844) 1 Genus Eunotia Ehrenb. (1837) 2 Genus Actinella F.W. Lewis (1864), nom. cons. 3 Genus Semiorbis R.M. Patrick (1966) 4 Genus Desmogonium Ehrenb. (1848)