Phylum Ciliophora Doflein, 1901 - ciliates
   Subphylum Intramacronucleata Lynn, 1996 - amphiesmates
     Class Spirotrichea Bütschli, 1889
       1 Subclass Protocruziidia de Puytorac et al., 1987
       2 Subclass Phacodiniidia Small & Lynn, 1985
       3 Subclass Licnophoria Corliss, 1957
       4 Subclass Hypotrichia (Stein, 1859) Cavalier-Smith, 1993
       5 Subclass Choreotrichia Small & Lynn, 1985
       6 Subclass Stichotrichia Small & Lynn, 1985
       7 Subclass Oligotrichia Bütschli, 1889