Class Dinophyceae Pascher (1914) Order Peridiniales Haeckel (1894) Family Heterocapsaceae Fensome, F.J.R. Taylor, G. Norris, Sarjeant, Wharton & G.L. Williams (1993) Genus Heterocapsa F. Stein (1883) Heterocapsa pygmaea Loeblich III, Schmidt & Sherley