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
                 Family Didiniidae Poche, 1913
                   1 Genus Didinium Stein, 1859
                   2 Genus Cyclotrichium Meunier, 1910
                   3 Genus Mesodinium Stein, 1862[1863]
                   4 Genus Monodinium Fabre-Domergue, 1888
                   5 Genus Askenasia Blochmann, 1895