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Mollusca (132 708)
Subphylum Aculifera
Subphylum Conchifera
Subphylum Placophora accepted as Polyplacophora
Superclass Aplacophora
Class Amphineura accepted as Aculifera
Class Bivalvia (24 984)
Class Caudofoveata (143)
Class Cephalopoda (1 827)
Class Conchifera accepted as Bivalvia
Class Cricoconarida † (1)
Class Gastropoda (102 646)
Subclass Amphigastropoda † (387)
Subclass Angiogastropoda represented as Gastropoda
Subclass Apogastropoda
Subclass Caenogastropoda (53 590)
Subclass Gastropoda incertae sedis (308)
Subclass Heterobranchia (39 154)
Infraclass "Lower Heterobranchia" (1 137)
Infraclass Euthyneura (37 431)
Subterclass Acteonimorpha (411)
Subterclass Ringipleura (2 918)
Superorder Nudipleura (2 749)
Order Notaspidea accepted as Pleurobranchomorpha
Order Nudibranchia (2 652)
Suborder Aeolidina accepted as Cladobranchia
Suborder Anthobranchia accepted as Doridina
Suborder Cladobranchia (1 093)
Infraorder Pseudoeuctenidiacea accepted as Doridoxoidea Bergh, 1899
Parvorder Aeolidida accepted as Aeolidioidea Gray, 1827
Parvorder Dendronotida accepted as Dendronotoidea Allman, 1845
Parvorder Dendronotina accepted as Dendronotoidea Allman, 1845
Parvorder Euarminida accepted as Arminoidea Iredale & O'Donoghue, 1923 (1841)
Section Acleioprocta accepted as Fionoidea Gray, 1857
Section Cleioprocta accepted as Aeolidioidea Gray, 1827
Section Pleuroprocta accepted as Flabellinoidea Bergh, 1889
Superfamily Aeolidiacea accepted as Aeolidioidea Gray, 1827
Superfamily Aeolidioidea Gray, 1827 (338)
Superfamily Arminoidea Iredale & O'Donoghue, 1923 (1841) (102)
Superfamily Cladobranchia incertae sedis (8)
Superfamily Dendronotoidea Allman, 1845 (199)
Superfamily Doridoxoidea Bergh, 1899 (2)
Superfamily Fionoidea Gray, 1857 (304)
Superfamily Flabellinoidea Bergh, 1889 accepted as Fionoidea Gray, 1857
Superfamily Proctonotoidea Gray, 1853 (49)
Family Antiopellidae Odhner, 1934 accepted as Janolidae Pruvot-Fol, 1933
Family Antiopidae Locard, 1886 accepted as Janolidae Pruvot-Fol, 1933
Family Charcotiidae Odhner, 1926 accepted as Curnonidae d'Udekem d'Acoz, 2017
Family Curnonidae d'Udekem d'Acoz, 2017 (4)
Family Dironidae Eliot, 1910 (4)
Family Janolidae Pruvot-Fol, 1933 (29)
Genus Antiopa Alder & Hancock, 1848 accepted as Antiopella Hoyle, 1902
Genus Antiopella Hoyle, 1902 (8)
Genus Bonisa Gosliner, 1981 (1)
Genus Galeojanolus M. C. Miller, 1971 (1)
Genus Janolus Bergh, 1884 (19)
Genus Janus Vérany, 1844 accepted as Antiopella Hoyle, 1902
Family Lemindidae R. J. Griffiths, 1985 (1)
Family Madrellidae Preston, 1911 (7)
Family Proctonotidae Gray, 1853 (4)
Family Zephyrinidae Iredale & O'Donoghue, 1923 accepted as Proctonotidae Gray, 1853
Subfamily Janinae Gray, 1847 accepted as Janolidae Pruvot-Fol, 1933
Subfamily Veniliinae Chenu, 1859 accepted as Proctonotidae Gray, 1853
Superfamily Tritonioidea Lamarck, 1809 (91)
Suborder Cladohepatica accepted as Cladobranchia
Suborder Dexiarchia accepted as Cladobranchia
Suborder Doridina (1 558)
Suborder Euctenidiacea accepted as Doridina
Suborder Holohepatica accepted as Doridina
Suborder Nudibranchia incertae sedis (1)
Order Pleurobranchida (97)
Genus Abranchus [sic] accepted as Abrancha van Hasselt, 1824
Genus Spongiodoris Pruvot-Fol, 1933
Superorder Ringiculimorpha (169)
Order Pleurobranchomorpha accepted as Pleurobranchida
Genus Abrancha van Hasselt, 1824
Subterclass Tectipleura (34 102)
Superorder Euthyneura incertae sedis
Infraclass Heterobranchia incertae sedis (478)
Infraclass Mesoneura (108)
Infraclass Opisthobranchia
Infraclass Pulmonata
Subclass Neomphaliones accepted as Vetigastropoda
Subclass Neritimorpha (1 914)
Subclass Orthogastropoda represented as Gastropoda
Subclass Patellogastropoda (511)
Subclass Prosobranchia
Subclass Psilogastropoda represented as Gastropoda
Subclass Vetigastropoda (6 782)
Class Lamellibranchiata accepted as Bivalvia
Class Loricata accepted as Polyplacophora
Class Mollusca incertae sedis † (372)
Class Monoplacophora (229)
Class Pelecypoda accepted as Bivalvia
Class Polyplacophora (1 377)
Class Polyplaxiphora accepted as Polyplacophora
Class Rostroconchia † (64)
Class Scaphopoda (752)
Class Solenoconchia accepted as Scaphopoda
Class Solenogastres (313)
Subclass Chaetodermomorpha accepted as Caudofoveata