Division [Bacillariophyta] Engl. & Gilg (1919) see Phylum Bacillariophyta Engl. & Gilg (1919) [Subdivision] Bacillariophytina Medlin & Kaczmarska (2004) see Subphylum Bacillariophytina Medlin & Kaczmarska (2004) Class Bacillariophyceae Haeckel (1878) - pennates Subclass Urneidophycidae Medlin (2016) - basal araphid diatoms Genus Psammoneis S. Sato, Kooistra & Medlin (2008)