Phylum Ciliophora Doflein, 1901 - ciliates
   Subphylum Intramacronucleata Lynn, 1996 - amphiesmates
     Class Oligohymenophorea de Puytorac et al., 1974 - oligohymenophoreans
       Subclass Scuticociliatia (E.B. Small, 1967)
         1 Order Philasterida Small, 1967
         2 Order Pleuronematida Fauré-Fremiet, 1956
         3 Order Thigmotrichida Chatton & Lwoff, 1922