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 Paraliales R.M. Crawford (1990) Family Paraliaceae R.M. Crawford (1988) 1 Genus Paralia Heib. (1863) 2 Genus Ellerbeckia R.M. Crawford (1988)