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Common Names in English:

• 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: Ciliatea () - Bütschli, 1889
              • Subclass: Choreotrichia () - Small & Lynn, 1985
                • Order: Oligotrichida () - Kofoid & Campbell, 1929
                  • Family: Xystonellidae () - Kofoid & Campbell, 1929
                    • Genus: Xystonella ()
                      • Specific descriptor: acus
                        • Scientific name: - Xystonella acus