• Cellular forms
• Domain: Eukaryota
• Kingdom: Animalia
• Subkingdom: Monocytozoa or Protozoa
• Phyllum: Ciliophora
• Class: Spirotrichea

• Order: Tintinnida
• Order: Euplotida
• Order: Kiitrichida
• Order: Urostylida
• Order: Stichotrichida
• Order: Sporadotrichida
• Order: Halteriida
• Order: Strombidiida
• Order: Choreotrichida
• Order: Odontostomatida