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• Domain: Eukaryota () - Whittaker & Margulis,1978
  • Kingdom: Protozoa () - (Goldfuss, 1818) R. Owen, 1858 - Protozoa
    • Subkingdom: Biciliata ()
      • Infrakingdom: Alveolata () - Cavalier-Smith, 1991
        • Phylum: Dinophyta () - Cavalier-Smith & Chao, 2004
          • Subphylum: Dinozoa ()
            • Infraphylum: Dinoflagellata ()
              • Class: Phytodiniales () - (Bütschli, 1885) Pascher, 1914
                • Order: Dinophyceae () - Christensen, 1962
                  • Family: Phytodiniaceae () - Klebs, 1912
                    • Genus: Tetradinium ()
                      • Specific descriptor: chiastosporum - Harris
                        • Scientific name: - Tetradinium chiastosporum Harris