• Abyssinoe abyssorum (McIntosh, 1885) accepted as Abyssoninoe abyssorum (McIntosh, 1885)
• Abyssinoe scopa accepted as Abyssoninoe scopa (Fauchald, 1974) sensu Miura, 1980
• Abyssoninoe abyssorum (McIntosh, 1885)
• Abyssoninoe galatheae (Knox & Green, 1972)
• Abyssoninoe hibernica (Mc Intosh, 1903)
• Abyssoninoe phuketensis Oug, 2002
• Abyssoninoe scopa (Fauchald, 1974) sensu Miura, 1980
• Aciculomarphysa comes Hartmann-Schröder & Zibrowius, 1998
• Aglaurides erythraeensis Gravier, 1900
• Aglaurides fulgida (Savigny in Lamarck, 1818)
• Americonuphis casamiquelorum Orensanz, 1974 accepted as Australonuphis casamiquelorum (Orensanz, 1974)
• Americonuphis hartmanae accepted as Australonuphis hartmanae
• Americonuphis magna (Andrews, 1891)
• Americonuphis reesei Fauchald, 1973
• Amphiro atlantica Kinberg, 1865 accepted as Marphysa atlantica (Kinberg, 1865)
• Amphiro cirrata Montagu, 1808 accepted as Amphitrite cirrata (O.F. Müller, 1771 in 1776)
• Amphiro constrictor Montagu, 1808
• Amphiro foetida Montagu in McIntosh, 1922 accepted as Amphitrite cirrata (O.F. Müller, 1771 in 1776)
• Amphiro gigantea Montagu, 1808
• Amphiro johnsoni Langerhans, 1880 accepted as Marphysa johnsoni (Langerhans, 1880)
• Amphiro nebulosa Montagu, 1808 accepted as Eupolymnia nebulosa (Montagu, 1818)
• Amphiro pacifica Rullier, 1972
• Amphiro simplex Langerhans, 1884
• Anchidorvillea moniliformis Hilbig & Blake, 1991
• Anchinothria abranchiata (McIntosh, 1885)
• Anchinothria cirrobranchiata (Moore, 1903)
• Anchinothria crassisetosa (Chamberlin, 1919)
• Anchinothria macrobranchiata (McIntosh, 1885)
• Anchinothria pycnobranchiata (McIntosh, 1885)
• Anchinothria tosaensis Imajima, 1999
• Anisoceras bioculata Grube, 1856
• Anisoceras rubra Grube, 1856 accepted as Dorvillea rubra (Grube, 1856)
• Anisoceras vittata Grube, 1856 accepted as Dorvillea vittata (Grube, 1856)
• Aotearia sulcaticeps Benham, 1927
• Apharyngtus punicus Westheide, 1971
• Apodotrocha progenerans Westheide & Riser, 1983
• Aponuphis bilineata (Baird, 1870)
• Aponuphis brementi (Fauvel, 1916)
• Aponuphis chistikovi Detinova, 1986
• Aponuphis fauveli (Rioja, 1918)
• Aponuphis grubii (Marenzeller, 1886)
• Aponuphis ornata (Fauvel, 1928)
• Aponuphis rigida (Claparède, 1868)
• Aponuphis rubra (Langerhans, 1880)
• Aponuphis willsiei Cantone & Bellan, 1995
• Aponuphis willsii Cantone & Bellan, 1994
• Apophryotrocha mutabiliseta Jumars, 1974
• Arenotrocha lanzarotensis Brito & Nunez, 2003
• Arenotrocha minuta (Levin, 1954)
• Arenotrocha minuta Westheide & Nordheim, 1985
• Augeneria albidentata
• Augeneria algida (Wirén, 1901)
• Augeneria bidens (Ehlers, 1887) accepted as Lumbrineris bidens Ehlers, 1887
• Augeneria dayi Silva, 1965
• Augeneria monotentaculata Averincev, 1972
• Augeneria polytentaculata Imajima & Higuchi, 1975
• Augeneria riojai Aguirrezabalaga & Carrera-Parra, 2006
• Augeneria tentaculata Monro, 1930
• Augeneria verdis Hutchings & Murray, 1984
• Australonuphis casamiquelorum (Orensanz, 1974)
• Australonuphis hartmanae
• Australonuphis parateres Paxton, 1979
• Australonuphis teres (Ehlers, 1868)
• Australonuphis violacea Rozbaczylo & Castilla, 1981
• Blainvillea elongata Quatrefages, 1866 accepted as Nematonereis elongata (Quatrefages, 1866)
• Blainvillea filum Quatrefages, 1866 accepted as Nematonereis filum (Quatrefages, 1866)
• Brevibrachium augeneri Paxton, 1986
• Brevibrachium hanneloreae Lana, 1991
• Brevibrachium maculatum (Estcourt, 1966)
• Cenogenus abyssalis (Imajima & Higuchi, 1975)
• Cenogenus antarctica (Monro, 1930)
• Cenogenus brevipes (McIntosh, 1903)
• Cenogenus descendens Chamberlin, 1919
• Cenogenus eliae Hernández-Alcántara, Pérez-Mendoza & Solís-Weiss, 2006
• Cenogenus fusca (Moore, 1911)
• Cenogenus fuscoides (Fauchald, 1970)
• Cenogenus hartmanae (Levenstein, 1977)
• Cenogenus minuta (Theel, 1879)
• Cenogenus monotentaculata (Averincev, 1972)
• Cenogenus nagae (Gallardo, 1968)
• Cenogenus simpla (Moore, 1905)
• Coelobranchus papillosus Izuka, 1912 accepted as Iphitime doederleini Marenzeller, 1902
• Conjungaspis minutus Hints, 1999 †
• Coralliotrocha composita Hartmann-Schröder & Rosenfeldt, 1992
• Coralliotrocha natans Westheide & Von Nordheim, 1985
• Dayus cirolanae (Fuehr, 1971)
• Diaphorosoma magnavena Wolf, 1986
• Dinophilus apatris Korschelt, 1882 accepted as Dinophilus gyrocilatus Schmidt, 1857
• Dinophilus borealis Diesing, 1862
• Dinophilus caudatus Levinsen, 1880 accepted as Dinophilus vorticoides Schmidt, 1848
• Dinophilus conklini Nelson, 1907 accepted as Dinophilus gyrocilatus Schmidt, 1857
• Dinophilus gardineri Moore, 1900
• Dinophilus gigas Weldon, 1886
• Dinophilus gyrocilatus Schmidt, 1857
• Dinophilus gyrociliatus O. Schmidt, 1857
• Dinophilus jagersteni
• Dinophilus metameroides Hallez, 1879 accepted as Dinophilus vorticoides Schmidt, 1848
• Dinophilus pygmaeus Verrill, 1892
• Dinophilus rostratus Schultz, 1902
• Dinophilus simplex Verrill, 1892