Order Peridiniales Haeckel (1894)
Count: -
   Family Thoracosphaeraceae J. Schiller (1930)
  Count: 15g; †88g
     Genus †Schizosphaerella Deflandre & Dangeard, 1938 see Genus Schizosphaerella Deflandre & P.J.L. Dang. (1938)
    Count: -