organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain eukaryotes see Domain Eukaryota Chatton, 1925
     alveolates Cavalier-Smith see [unranked] Alveolata Cavalier-Smith, 1991
       Phylum Ciliophora Doflein, 1901 - ciliates
         Subphylum Intramacronucleata Lynn, 1996 - amphiesmates
           Class Litostomatea Small & Lynn, 1981
             Subclass Trichostomatia Bütschli, 1889
               Order Entodiniomorphida Reichenow, in Doflein & Reichenow, 1929
                 Suborder Entodiniomorphinaᵀ Reichenow, in Doflein & Reichenow, 1929
                   1 Family Ophryoscolecidaeᵀ Stein, 1859
                   2 Family Cycloposthiidae Poche, 1913
                   3 Family Spirodiniidae Strelkow, 1939
                   4 Family Troglodytellidae Corliss, 1979