Class Dinophyceae Pascher (1914)
   Order Brachydiniales Sournia (1984) see Order Brachidiniales A.R. Loebl. ex Sournia (1984)
     Family Brachydiniaceae Sournia (1972) see Family Brachidiniaceae Sournia (1972)
       Genus Brachydinium F.J.R. Taylor (1963) see Genus Brachidinium F.J.R. Taylor (1963)
         Brachydinium capitatum F.J.R. Taylor