Division Bacillariophyta Engl. & Gilg (1919) see Phylum Bacillariophyta Engl. & Gilg (1919) Class Coscinodiscophyceae Round & R.M. Crawford (1990) - radial centrics Subclass Coscinodiscophycidae Round & R.M. Crawford (1990) Order Coscinodiscales Round & R.M. Crawford (1990) Family Coscinodiscaceae Kütz. (1844) 1 Genus Coscinodiscus Ehrenb. (1839) 2 Genus Palmeria Grev. (1865) 3 Genus Stellarima Hasle & P.A. Sims (1986) 4 Genus Brightwellia Ralfs (1861) 5 Genus Craspedodiscus Ehrenb. (1844)