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 Haptoria Corliss, 1974
               Order Haptoridaᵀ Corliss, 1974
                 Family Tracheliidae Ehrenberg, 1838
                   1 Genus Teuthophrys Chatton & de Beauchamp, 1923
                   2 Genus Paradileptus Wenrich, 1929
                   3 Genus Trachelius Schrank, 1803
                   4 Genus Dileptus Dujardin, 1840