living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Protozoa Goldfuss, 1818 see Kingdom Protozoa Goldfuss, 1818
         Phylum Ciliophora Doflein, 1901 - ciliates
           Class Kinetofragminophora see Class Kinetofragminophorea
             Subclass Gymnostomata see Subclass Gymnostomatia
               Order Haptorida Corliss, 1974
                 1 Family Actinobolinidae Kahl, 1930
                 2 Family Didiniidae Poche, 1913
                 3 Family Enchelyidae Ehrenberg, 1838
                 4 Family Spathidiidae Kahl, 1929
                 5 Family Tracheliidae Ehrenberg, 1838
                 6 Family Protohallidae see Family Protohalliidae da Cunha & Muniz, 1927
                 6 Family Protohalliidae da Cunha & Muniz, 1927