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) Family Naviculaceae Kütz. (1844) 1 Genus Naviculaᵀ Bory (1822) 2 Genus Trachyneis Cleve (1894) 3 Genus Pseudogomphonema Medlin (1986) 4 Genus Seminavis D.G.Mann (1990) 5 Genus Rhoikoneis Grunow (1863) 6 Genus Haslea Simonsen (1974) 7 Genus Cymatoneis Cleve (1894)