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• Domain: Eukaryota () - Whittaker & Margulis,1978
  • Kingdom: Chromista () - T. Cavalier-Smith, 1981
    • Subkingdom: Chromobiota () - Cavalier-Smith, 1991
      • Infrakingdom: Haptista ()
        • Phylum: Haptophyta () - Hibberd Ex Cavalier-Smith, 1986
          • Class: Prymnesiophyceae () - D.j. Hibberd, 1976
            • Order: Coccosphaerales () - Haeckel, 1894
              • Family: Coccolithaceae ()
                • Genus: Calcidiscus ()
                  • Specific descriptor: premacintyrei
                    • Scientific name: - Calcidiscus premacintyrei