Class Dinophyceae Pascher (1914)
   Order Peridiniales Haeckel (1894)
     Family Cladopyxidaceae F. Stein (1883)
       55 Genus Cladopyxis F. Stein (1883)
       56 Genus Micracanthodinium Deflandre (1937)
       57 Genus Palaeophalacroma J. Schiller (1928)
       58 Genus Peridiniella Kof. & J.R. Michener (1911)