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• Domain: Eukaryota () - Whittaker & Margulis,1978
  • Kingdom: Protozoa () - (Goldfuss, 1818) R. Owen, 1858 - Protozoa
    • Infrakingdom: Excavata () - Cavalier-Smith, 2002
      • Phylum: Euglenozoa ()
        • Class: Euglenida () - W. Schoenichen, 1925
          • Order: Euglenales ()
            • Family: Euglenaceae ()
              • Genus: Calkinsia ()
                • Specific descriptor: plafkeri
                  • Scientific name: - Calkinsia plafkeri