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 Rhizosoleniophycidae Round & R.M. Crawford (1990) Count: [f] 1o;3f;10g Order Rhizosoleniales P.C.Silva (1962) Count: [f] 3f;10g ?Family Acanthoceraceae (R.M. Crawford, 1990) see Family Acanthocerataceae R.M. Crawford & Round (1990) Count: 1g Genus Acanthoceros see Genus Acanthoceras Honigm. (1909) Count: -