Class Dinophyceae Pascher (1914) Order Gymnodiniales Apstein (1909) 1 Family Gymnodiniaceae Lank. (1885) 2 Family Polykrikaceae Kof. & Swezy (1921) see Family Gymnodiniaceae Lank. (1885) 3 Family Ptychodiscaceae Lemmerm. (1899) 4 Family Warnowiaceae Er. Lindem. (1928)