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 Phyllopharyngea de Puytorac et al., 1974
             Subclass Suctoria Claparède & Lachmann, 1858 - suctorians
               Order Exogenida Collin, 1912
                 01 Family Phalacrocleptidae Kozloff, 1966
                 02 Family Stylostomatidae Batisse, 1975
                 03 Family Rhabdophryidae Jankowski, 1970
                 04 Family Ophryodendridae Stein, 1867
                 05 Family Spelaeophryidae Jankowski, in Batisse, 1975
                 06 Family Ephelotidae Kent, 1882
                 07 Family Parapodophryidae Jankowski, 1973
                 08 Family Podophryidae Haeckel, 1866
                 09 Family Tachyblastonidae Grell, 1950
                 10 Family Metacinetidae Bütschli, 1889
                 11 Family Thecacinetidae D. Matthes, 1956
                 12 Family Paracinetidae Jankowski, 1978
                 13 Family Urnulidae Fraipont, 1878
                 14 Family Corynophryidae Jankowski, 1981