Class Dinophyceae Pascher (1914) Order Peridiniales Haeckel (1894) Family Oxytoxaceae Er. Lindem. (1928) Genus Oxytoxum F. Stein (1883) Oxytoxum constrictum (Stein, 1883) Bütschli see Corythodinium constrictum (Stein) F.J.R. Taylor