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 Naviculales Bessey (1907) Suborder Neidiineae D.G.Mann (1990) Family Scoliotropidaceae Mereschk. (1903) Genus Biremis D.G.Mann & E.J. Cox (1990) Biremis ridicula (Giffen) D.G.Mann (1990)