[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
     Class Dinophyceae Pascher (1914)
       Subclass Peridiniphycidae Fensome, F.J.R. Taylor, G. Norris, Sarjeant, Wharton & G.L. Williams (1993)
         Family Oxytoxaceae Er. Lindem. (1928)
           Genus Oxytoxum F. Stein (1883)
             Oxytoxum constrictum (Stein, 1883) Bütschli see Corythodinium constrictum (Stein) F.J.R. Taylor