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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: Ciliophora () - (Doflein, 1901) Copeland, 1956 - Ciliates
          • Subphylum: Intramacronucleata () - Lynn, 1996
            • Class: Spirotrichea () - Bütschli, 1889
              • Order: Armophorida () - Jankowski, 1964
                • Family: Metopidae () - Kahl, 1927
                  • Genus: Metopus ()
                    • Specific descriptor: musicola
                      • Scientific name: - Metopus musicola