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 Oligohymenophorea de Puytorac et al., 1974 - oligohymenophoreans
             Subclass Scuticociliatia (E.B. Small, 1967)
               Order Pleuronematida Fauré-Fremiet, 1956
                 1 Family Calyptotrichidae Small & Lynn, 1985
                 2 Family Ctedoctematidae Small & Lynn, 1985
                 3 Family Histiobalantiidae de Puytorac & Corliss, in Corliss, 1979
                 4 Family Peniculistomatidae Fenchel, 1965
                 5 Family Pleuronematidaeᵀ Kent, 1881
                 6 Family Dragescoidae Jankowski, in Small & Lynn, 1985
                 7 Family Cyclidiidae Ehrenberg, 1838
                 8 Family Conchophthiridae Kahl, in Doflein & Reichenow, 1929
                 9 Family Thigmocomidae Kazubski, 1958