Division Bacillariophyta Engl. & Gilg (1919) see Phylum Bacillariophyta Engl. & Gilg (1919) Class Coscinodiscophyceae Round & R.M. Crawford (1990) - radial centrics Subclass Corethrophycidae Round & R.M. Crawford (1990) Order Corethrales Round & R.M. Crawford (1990) Family Corethraceae M. Lebour (1930) Genus Corethron Castrac. (1886)