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 Oligohymenophora see Class Oligohymenophorea de Puytorac et al., 1974
             Subclass Peritricha Stein, 1859 - peritrichs see Subclass Peritrichia Stein, 1859
               Order Peritrichida Stein, 1859 see Subclass Peritrichia Stein, 1859
                 Suborder Mobilina Kahl, 1933 see Order Mobilida Kahl, 1933
                   Family Trichodinidae Claus, 1874
                     1 Genus Acyclochaeta Zick, 1928
                     2 Genus Dipartiella G. Stein, 1961
                     3 Genus Paratrichodina Lom, 1963
                     4 Genus Semitrichodina Kazubski, 1958
                     5 Genus Trichodina Ehrenberg, [1830]
                     6 Genus Trichodinella Srámek-Husek, 1953
                     7 Genus Tripartiella Lom, 1963
                     8 Genus Vauchomia Mueller, 1938