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 Naviculineae (Bessey) Hendey (1937) 1 Family Naviculaceae Kütz. (1844) 2 Family Pleurosigmataceae Mereschk. (1903) 3 Family Plagiotropidaceae D.G.Mann (1990) 4 Family Stauroneidaceae D.G.Mann (1990) 5 Family Proschkiniaceae D.G.Mann (1990)