organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain eukaryotes see Domain Eukaryota Chatton, 1925
     alveolates Cavalier-Smith see [unranked] Alveolata Cavalier-Smith, 1991
       Phylum Dinoflagellata Engl. (1903) see Superclass Dinoflagellata Bütschli, 1885
         Class Dinophyceae Pascher (1914)
           Order Gonyaulacales F.J.R. Taylor (1980)
             Family Goniodomaceae Er. Lindem. (1928) see Family Goniodomataceae Er. Lindem. (1928)
               1 Genus Triadinium J.D. Dodge (1981)
               2 Genus Helgolandinium von Stosch (1969) see Genus Fragilidium Balech ex A.R. Loebl. (1965)
               3 Genus Alexandrium Halim (1960)
               4 Genus Pyrophacus F. Stein (1883)
               5 Genus Pyrodinium L. Plate (1906)