Kingdom Protoctista Hogg, 1860 Phylum Bacillariophyta Engl. & Gilg (1919) - diatoms see [unranked] Diatomea Kütz. (1844) Class Bacillariophyceae Haeckel (1878) - pennates Subclass Bacillariophycidae D.G.Mann (1990) - raphid diatoms Order Naviculales Bessey (1907) 1 Suborder Sellaphorineae D.G.Mann (1990) 2 Suborder Neidiineae D.G.Mann (1990) 3 Suborder Naviculineae (Bessey) Hendey (1937) 4 Suborder Diploneidineae D.G.Mann (1990)