Kingdom Protoctista Hogg, 1860 Phylum Bacillariophyta Engl. & Gilg (1919) - diatoms see [unranked] Diatomea Kütz. (1844) Class Coscinodiscophyceae Round & R.M. Crawford (1990) - radial centrics Subclass Cymatosirophycidae Round & R.M. Crawford (1990) see Class Mediophyceae Medlin & Kaczmarska (2004) Order Cymatosirales Round & R.M. Crawford (1990) Family Cymatosiraceae Hasle, Stosch & Syvertsen (1983) 1 Genus Campylosira Grunow (1881) 2 Genus Cymatosira Grunow (1862) 3 Genus Brockmaniella see Genus Brockmanniella Hasle, Stosch & Syvertsen (1983) 4 Genus Leyanella Hasle, Stosch & Syvertsen (1983) 5 Genus Plagiogrammopsis Hasle, Stosch & Syvertsen (1983) 6 Genus Arcocellulus Hasle, Stosch & Syvertsen (1983) 7 Genus Papiliocellulus Hasle, Stosch & Syvertsen (1983) 8 Genus Extubocellulus Hasle, Stosch & Syvertsen (1983) 9 Genus Minutocellus