Kingdom Protoctista Hogg, 1860 Phylum Dinomastigota Margulis, 1996 see Phylum Dinoflagellata Engl. (1903) Genus Gymnodinium F. Stein (1878) 1 Class Dinophyceae Pascher (1914) 2 Class Syndiniophyceae A.R. Loebl. (1976) see Class Syndinea Chatton, 1920