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 Sarcomastigophora Honigberg & Balamuth, 1963
           Subphylum Mastigophora Diesing, 1866 - flagellates
             Class Zoomastigophora see Class Zoomastigophorea
               Order Trichomonadida Kirby, 1947 - trichomonads
                 Family Monocercomonadidae Kirby, 1944
                   Subfamily Monocercomonadinae Kirby, 1944 see Family Monocercomonadidae Kirby, 1944
                     1 Genus Monocercomonas Grassi, 1879
                     2 Genus Tricercomitus Kirby, 1930
                     3 Genus Hexamastix Alexeieff, 1912
                     4 Genus Tetratrichomastix Mackinnon, 1913 see Genus Hexamastix Alexeieff, 1912