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 Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Annelida Lamarck, 1809 - segmented worms
           Class Oligochaeta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata
             Order Haplotaxida
               Suborder Tubificina see Order Tubificida
                 Superfamily Tubificoidea see Suborder Tubificina
                   Family Tubificidae Vejdovský, 1876 - sludge worms see Family Naididae Ehrenberg, 1828
                     01 Genus Peloscolex Leidy, 1851
                     02 Genus Bothrioneurum Michaelsen, 1900
                     03 Genus Branchiura Beddard, 1892
                     04 Subfamily Tubificinae Vejdovský, 1876
                     05 Subfamily Rhyacodrilinae Hrabě, 1963
                     06 Subfamily Aulodrilinae see Subfamily Tubificinae Vejdovský, 1876
                     07 Subfamily Phallodrilinae Brinkhurst, 1971
                     08 Subfamily Branchiurinae see Subfamily Rhyacodrilinae Hrabě, 1963
                     09 Subfamily Telmatodrilinae Eisen, 1879
                     10 Genus Tubifex Lamarck, 1816
                     11 Genus Limnodrilus Claparède, 1862
                     12 Genus Aulodrilus Bretscher, 1899
                     13 Genus Monopylephorus Levinsen, 1884
                     14 Genus Clitellio Savigny, 1820
                     15 Genus Smithsonidrilus Brinkhurst, 1966
                     16 Genus Adelodrilus Cook, 1969
                     17 Genus Phallodrilus Pierantoni, 1902
                     18 Genus Limnodriloides Pierantoni, 1903
                     19 Genus Telmatodrilus Eisen, 1879