Class Dinophyceae Pascher (1914)
   Order Pyrocystales Apstein (1909) see Order Gonyaulacales F.J.R. Taylor (1980)
     Family Pyrocystaceae (F. Schütt) Lemmerm. (1899)
       114 Genus Dissodinium G.A. Klebs (1916)
       115 Genus Pyrocystis J. Murray ex Haeckel (1890)