Class Dinophyceae Pascher (1914)
   Order Dinophysiales Kof. (1926) see Order Dinophysales Er. Lindem. (1928)
     Family Oxyphysaceae Sournia (1984)
       Genus Oxyphysis Kof. (1926) see Genus Phalacroma F. Stein (1883)
         Oxyphysis oxytoxoides Kofoid