Families: Ailoscolecidae - Acanthodrilidae - Almidae - Biwadrilidae - Criodrilidae - Eudrilidae - Glossoscolecidae - Haplotaxidae - Hormogastridae - Komarekionidae - Kynotidae - Lumbricidae - Lutodrilidae - Megascolecidae - Microchaetidae - Moniligastridae - Ocnerodrilidae - Rhinodrilidae - Sparganophilidae - Syngenodrilidae - Tiguassuidae - Tritogeniidae - Tumakidae

Haplotaxidae (Michaelsen, 1900)

Delaya (Brinkhurst, 1988)

• Delaya bureschi (Michaelsen, 1925)

Haplotaxis (Hoffmeister, 1843)

• Haplotaxis acystis (Michaelsen, 1903)
• Haplotaxis aedeochaeta (Brink and Machese, 1987)
• Haplotaxis ascaridoides (Michaelsen, 1905)
• Haplotaxis attemsi (Michaelsen, 1903)
• Haplotaxis brinckhursti (Cook, 1975)
• Haplotaxis cantabronensis (Delay, 1973)
• Haplotaxis carnivorus (Omodeo, 1958)
• Haplotaxis corbarensis (Delay, 1972)
• Haplotaxis forbesi (Smith F., 1918)
• Haplotaxis gastrochaetus (Yamaguchi, 1953)
• Haplotaxis heterogyne (Benham, 1903)
• Haplotaxis intermedia (Pierantoni, 1905)
• Haplotaxis intermedius (Michaelsen, 1903)
• Haplotaxis menkeana (Hoffman, 1843)
• Haplotaxis navarrensis (Delay, 1973)
• Haplotaxis ornamentus (Brinkhurst and Fulton, 1980)
• Haplotaxis sotschiensis (Michaelsen, 1903)
• Haplotaxis villiersi (Omodeo, 1987)

Hologynus (Brinkhurst, 1988)

• Hologynus hologynus (Michaelsen, 1907)

Metataxis (Righi, 1985)

• Metataxis bare (Righi, 1988)
• Metataxis carnivorus (Omodeo, 1987)
• Metataxis eliae (Righi, 1985)

Nemodrilus (Claparède, 1862)

• Nemodrilus filiformis (Claparede, 1862)

Omodeodrilus (Kammerer, 2006)

• Omodeodrilus guanivora (Omodeo, 1987)

Pelodrilus (Beddard, 1891)

• Pelodrilus africanus (Michaelsen, 1905)
• Pelodrilus americanus (Cernosvitov, 1939)
• Pelodrilus aucklandicus (Benham, 1909)
• Pelodrilus bipapillatus (Michaelsen, 1924)
• Pelodrilus cuenoti (Tetry, 1934)
• Pelodrilus darlingensis (Michaelsen, 1907)
• Pelodrilus falcifer (Omodeo, 1963)
• Pelodrilus ignatovi (Michaelsen, 1903)
• Pelodrilus kraepelini (Hrabe, 1933)
• Pelodrilus leruthi (Hrabe, 1958)
• Pelodrilus monticola (Michaelsen, 1908)
• Pelodrilus pseudotuberculatus (Zicsi, 1998)
• Pelodrilus tuberculatus (Benham, 1909)
• Pelodrilus violaceus (Beddard, 1891)
• Haplotaxis curvisetosa (Friend, 1896)
• Haplotaxis darwinii (Keller, 1885)
• Haplotaxis denticulatus (Cekanovskaya, 1959)
• Haplotaxis dubius (Hrabê, 1931)
• Haplotaxis emissarius (Forbes, 1890)
• Haplotaxis endeka (Giard, 1894)
• Haplotaxis glandularis (Yamaguchi, 1953)
• Haplotaxis gordioides (Hartmann, 1821)
• Haplotaxis hartmanni (Noll, 1874)
• Haplotaxis heydeni (Noll, 1873)
• Haplotaxis ichthyophagous (Gates, 1971)
• Haplotaxis insectivorus (Omodeo, 1958)
• Haplotaxis kraepelini (Michaelsen, 1914)
• Haplotaxis lichtensteinii (Schlotthauber, 1860)
• Haplotaxis menkei (Schlotthauber, 1860)
• Haplotaxis smithii (Beddard, 1888)
• Haplotaxis vermivorus (Michaelsen, 1932)
• Metataxis brinkhursti (Cook, 1975)