[ref. ID; 1663 (Robert W. Pennak, 1978)]

Phylum Ciliophora

Subclass Holotricha

Order Thigmotrichida

Order Gymnostomatida

Order Trichostomatida

Order Hymenostomatida

Order Heterotrichida

Order Oligotrichida

Order Odontostomatida

Subclass Spirotrichia

Order Hypotrichida

Subclass Peritrichia

Order Sessilia

Order Mobilia

Subclass Suctoria