Kingdom Protoctista Hogg, 1860 Count: [p] 36p;91c;87o;183f;507g;35s;2v Phylum Bacillariophyta Engl. & Gilg (1919) - diatoms see [unranked] Diatomea Kütz. (1844) Count: [f] 4c;41o;83f;204g Class Coscinodiscophyceae Round & R.M. Crawford (1990) - radial centrics Count: 20o;33f;85g Subclass Chaetocerophycidae see Subclass Chaetocerotophycidae Round & R.M. Crawford (1990) Count: [f] 2o;2f;3g Order Chaetocerotales Round & R.M. Crawford (1990) Count: [f] 1f;2g Family Chaetocerotaceae Ralfs (1861) Count: 2g Genus Chaetoceros Ehrenb. (1844) Count: -