Protozoa Goldfuss, 1818 - protozoans Phylum Ciliophora Doflein, 1901 - ciliates Class Oligohymenophorea de Puytorac et al., 1974 - oligohymenophoreans Subclass Hysterocinetia see Subclass Scuticociliatia (E.B. Small, 1967) Order Hysterocinetida see Order Thigmotrichida Chatton & Lwoff, 1922