• Arenadiplosoma migrans Menker & Ax, 1970 accepted as Diplosoma migrans (Menker & Ax, 1970)
• Arenodiplosoma migrans Menker & Ax, 1970 accepted as Diplosoma migrans (Menker & Ax, 1970)
• Askonides coelenteratus Kott, 1962 accepted as Leptoclinides coelenteratus (Kott, 1962)
• Askonides imperfectus Kott, 1962 accepted as Leptoclinides imperfectus (Kott, 1962)
• Astellium spongiforme Giard, 1872 accepted as Diplosoma listerianum (Milne Edwards, 1841)
• Atriolum bucinum Kott, 2001
• Atriolum crusta Monniot F. & Monniot C., 2008
• Atriolum eversum Kott, 2001
• Atriolum glauerti (Michaelsen, 1930)
• Atriolum irregulare Kott, 2007
• Atriolum lilium Kott, 2001
• Atriolum marinense Kott, 2001
• Atriolum marsupiale Monniot F., 1989 accepted as Atriolum marsupialis Monniot F., 1989
• Atriolum marsupialis Monniot F., 1989
• Atriolum quadratum Monniot F. & Monniot C., 1996
• Atriolum robostum Kott, 1983 accepted as Atriolum robustum Kott, 1983
• Atriolum robustum Kott, 1983
• Atriolum tubiporum Kott, 2001
• Clitella nutricula Kott, 2001
• Coelocormus huxleyi Herdman, 1886
• Didemnium roseum Sars, 1851 accepted as Didemnum roseum Sars, 1851
• Didemnium stylifera Kowalevsky, 1874 accepted as Distaplia stylifera (Kowalevsky, 1874)
• Didemnoides inarmata (Drasche, 1883) accepted as Trididemnum inarmatum (Drasche, 1883)
• Didemnoides lambitum Sluiter, 1900 accepted as Didemnum lambitum (Sluiter, 1900)
• Didemnoides macroophorum Drasche, 1883 accepted as Polysyncraton lacazei (Giard, 1872)
• Didemnoides massiliense Daumezon, 1908 accepted as Polysyncraton lacazei (Giard, 1872)
• Didemnoides patella Gottschaldt, 1898 accepted as Lissoclinum patella (Gottschaldt, 1898)
• Didemnoides resinaceum Drasche, 1883 accepted as Didemnum lahillei Hartmeyer, 1909
• Didemnoides sulcatum Gottschaldt, 1898 accepted as Lissoclinum patella (Gottschaldt, 1898)
• Didemnoides ternatanum Gottschaldt, 1898 accepted as Lissoclinum patella (Gottschaldt, 1898)
• Didemnoides tigrinum Oka, 1927 accepted as Leptoclinides reticulatus (Sluiter, 1909)
• Didemnoides variabile Huitfeld-Kaas, 1896 accepted as Trididemnum tenerum (Verrill, 1871)
• Didemnopsis globuliferum Sluiter, 1913 accepted as Didemnum viride (Herdman, 1906)
• Didemnopsis inarmata (Drasche, 1883) accepted as Trididemnum inarmatum (Drasche, 1883)
• Didemnopsis jolense Van Name, 1918 accepted as Trididemnum discrepans (Sluiter, 1909)
• Didemnopsis microzoa Redikorzev, 1913 accepted as Trididemnum microzoa (Redikorzev, 1913)
• Didemnopsis profundus Sluiter, 1909 accepted as Trididemnum profundum (Sluiter, 1909)
• Didemnopsis sansibaricum Michaelsen, 1920 accepted as Trididemnum sansibaricum (Michaelsen, 1920)
• Didemnopsis tenerum (Verrill, 1871) accepted as Trididemnum tenerum (Verrill, 1871)
• Didemnopsis translucidum Lafargue, 1968 accepted as Trididemnum translucidum (Lafargue, 1968)
• Didemnopsis variabile (Huitfeld-Kaas, 1896) accepted as Trididemnum tenerum (Verrill, 1871)
• Didemnum abradatum Kott, 2007
• Didemnum ahu Monniot C. & Monniot F., 1987
• Didemnum albidum (Verrill, 1871)
• Didemnum albopunctatum Sluiter, 1909
• Didemnum algasedens Monniot F. & Monniot C., 2001
• Didemnum amethysteum (Van Name, 1902)
• Didemnum amourouxi Lafargue, 1976
• Didemnum annectens (Herdman, 1886) accepted as Didemnum candidum Savigny, 1816
• Didemnum anoi Monniot C. & Monniot F., 1987 accepted as Didemnum nekozita Tokioka, 1967
• Didemnum apersum Tokioka, 1953
• Didemnum apuroto Monniot C. & Monniot F., 1987
• Didemnum arafurensis Tokioka, 1952 accepted as Polysyncraton arafurensis (Tokioka, 1952)
• Didemnum arancium Kott, 2001
• Didemnum aratore Kott, 2004
• Didemnum areolatum Herdman, 1906 accepted as Trididemnum areolatum (Herdman, 1906)
• Didemnum areolatum Tokioka, 1953 accepted as Trididemnum areolatum (Herdman, 1906)
• Didemnum asperum (Milne Edwards, 1841) accepted as Didemnum maculosum (Milne Edwards, 1841)
• Didemnum aspiculatum Tokioka, 1949 accepted as Polysyncraton aspiculatum (Tokioka, 1949)
• Didemnum asterix Kott, 2004
• Didemnum astrum Kott, 2001
• Didemnum atrocanum Van Name, 1902 accepted as Trididemnum savignii (Herdman, 1886)
• Didemnum augusti Michaelsen, 1920
• Didemnum aurantiacum Herdman, 1886
• Didemnum aurantium Rocha & Neves, 2015
• Didemnum aures Monniot C., Monniot F., Griffiths & Schleyer, 2001
• Didemnum bentarti Varela & Ramos-Esplá, 2008
• Didemnum beringense Romanov, 1977
• Didemnum bicolor Kott, 2001 accepted as Didemnum pica Brunetti, 2007
• Didemnum bicolor Vasseur, 1969 accepted as Didemnum madagascariense Brunetti, 2007
• Didemnum biglans (Sluiter, 1906)
• Didemnum biglutinum Monniot F., 1995
• Didemnum bimasculum Monniot F., 1995
• Didemnum bisectatum Kott, 2001
• Didemnum bistratum Sluiter, 1905 accepted as Lissoclinum bistratum (Sluiter, 1905)
• Didemnum brevioris Monniot F. & Monniot C., 1997
• Didemnum caesium Sluiter, 1909
• Didemnum calliginosum Monniot F., 1984
• Didemnum candidum Savigny, 1816
• Didemnum captivum Monniot F. & Monniot C., 1997
• Didemnum carnulentum Ritter & Forsyth, 1917
• Didemnum carpenteri (Herdman, 1886)
• Didemnum caudiculatum Romanov, 1989
• Didemnum cerebrale Michaelsen, 1920
• Didemnum cereum Giard, 1872 accepted as Trididemnum cereum (Giard, 1872)
• Didemnum chartaceum Sluiter, 1909
• Didemnum chilense Ärnbäck, 1929
• Didemnum chondrilla Michaelsen, 1924 accepted as Polysyncraton chondrilla (Michaelsen, 1924)
• Didemnum cilicium Kott, 2005
• Didemnum cineraceum (Sluiter, 1898)
• Didemnum clavum Kott, 2001
• Didemnum coccineum (Drasche, 1883)
• Didemnum commune (Della Valle, 1877)
• Didemnum complexum Kott, 2001
• Didemnum conchyliatum (Sluiter, 1898)
• Didemnum congregatum Kott, 2004
• Didemnum contortum Monniot F. & Monniot C., 1997
• Didemnum coralliforme Kott, 2004
• Didemnum coriaceum (Drasche, 1883)
• Didemnum corium Kott, 2005