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Mollusca (132 791)
Subphylum Aculifera
Subphylum Conchifera
Subphylum Placophora accepted as Polyplacophora
Superclass Aplacophora
Class Amphineura accepted as Aculifera
Class Bivalvia (25 009)
Class Caudofoveata (143)
Class Cephalopoda (1 834)
Class Conchifera accepted as Bivalvia
Class Cricoconarida † (1)
Class Gastropoda (102 697)
Subclass Amphigastropoda † (390)
Subclass Angiogastropoda represented as Gastropoda
Subclass Apogastropoda
Subclass Caenogastropoda (53 636)
Subclass Gastropoda incertae sedis (308)
Subclass Heterobranchia (39 156)
Infraclass "Lower Heterobranchia" (1 137)
Infraclass Euthyneura (37 433)
Subterclass Acteonimorpha (411)
Subterclass Ringipleura (2 917)
Subterclass Tectipleura (34 105)
Superorder Acochlidiimorpha (48)
Superorder Ascoglossa accepted as Sacoglossa
Superorder Basommatophora accepted as Hygrophila
Superorder Eupulmonata (25 569)
Order Aillyida accepted as Achatinina
Order Ellobiida (579)
Order Gymnomorpha accepted as Systellommatophora
Order Stylommatophora (24 766)
Suborder Achatinina (2 900)
Suborder Elasmognatha accepted as Succineoidei
Suborder Helicina (21 626)
Infraorder Arionoidei (140)
Infraorder Clausilioidei (1 859)
Infraorder Helicina incertae sedis (3 210)
Infraorder Helicoidei (5 690)
Infraorder Limacoidei (4 251)
Superfamily Dyakioidea Gude & B. B. Woodward, 1921 accepted as Trochomorphoidea Mörch, 1864
Superfamily Gastrodontoidea Tryon, 1866 (621)
Superfamily Helicarionoidea Bourguignat, 1877 (1 862)
Superfamily Limacoidea Batsch, 1789 (365)
Family Agriolimacidae H. Wagner, 1935 (121)
Family Boettgerillidae Wiktor & I. M. Likharev, 1979 (2)
Family Boettgerillidae Van Goethem, 1972 accepted as Boettgerillidae Wiktor & I. M. Likharev, 1979
Family Limacidae Batsch, 1789 (107)
Family Vitrinidae Fitzinger, 1833 (133)
Subfamily Phenacolimacinae Schileyko, 1986 accepted as Vitrinidae Fitzinger, 1833
Subfamily Plutoniainae T. D. A. Cockerell, 1893 accepted as Plutoniinae T. D. A. Cockerell, 1893
Subfamily Plutoniinae T. D. A. Cockerell, 1893 (98)
Subfamily Semilimacinae Schileyko, 1986 accepted as Vitrinidae Fitzinger, 1833
Subfamily Vitrininae Fitzinger, 1833 (32)
Genus Balcanovitrina Ošanova & L. Pintér, 1968 accepted as Semilimacella Soós, 1917
Genus Cobresia Hübner, 1810 accepted as Vitrina Draparnaud, 1801
Genus Eucobresia H. B. Baker, 1929 (4)
Genus Helicolimax J. B. Férussac, 1807 accepted as Vitrina Draparnaud, 1801
Subgenus Helicolimax (Helicolimax) J. B. Férussac, 1807 accepted as Helicolimax J. B. Férussac, 1807
Subgenus Helicolimax (Oligolimax) P. Fischer, 1878 accepted as Oligolimax P. Fischer, 1878
Species Helicolimax annularis (S. Studer, 1820) accepted as Oligolimax annularis (S. Studer, 1820)
Species Helicolimax brevis A. Férussac, 1821 accepted as Vitrinobrachium breve (A. Férussac, 1821)
Species Helicolimax lamarckii A. Férussac, 1821 accepted as Insulivitrina lamarckii (A. Férussac, 1821)
Species Helicolimax major A. Férussac, 1807 accepted as Phenacolimax major (A. Férussac, 1807)
Species Helicolimax pellicula A. Férussac, 1821 accepted as Sheldonia pellicula (A. Férussac, 1821)
Species Helicolimax pyrenaica A. Férussac, 1821 accepted as Semilimax pyrenaicus (A. Férussac, 1821)
Genus Hessemilimax Schileyko, 1986 (1)
Genus Hyalina S. Studer, 1820 accepted as Vitrina Draparnaud, 1801
Genus Oligolimax P. Fischer, 1878 (6)
Genus Pagana Gistel, 1848 accepted as Vitrina Draparnaud, 1801
Genus Semilimacella Soós, 1917 (3)
Genus Semilimax J. E. Gray, 1847 (3)
Genus Targionia P. Hesse, 1923 accepted as Semilimacella Soós, 1917
Genus Tozzettia P. Hesse, 1924 accepted as Semilimacella Soós, 1917
Genus Vitrina Draparnaud, 1801 (12)
Genus Vitrinobrachium Künkel, 1929 (3)
Genus Vitrinopugio Ihering, 1892 accepted as Semilimax J. E. Gray, 1847
Genus Vitrinus Montfort, 1810 accepted as Vitrina Draparnaud, 1801
Genus Planellavitrina Margry, 2018 † (1)
Genus Provitrina Wenz, 1919 † (2)
Genus Mennoia Harzhauser & Neubauer, 2018 † (1)
Genus Neubertella Harzhauser & Neubauer, 2018 † (1)
Superfamily Limacoidei incertae sedis (3)
Superfamily Parmacelloidea P. Fischer, 1856 (1855)
Superfamily Trochomorphoidea Mörch, 1864 (1 190)
Superfamily Zonitoidea Mörch, 1864 (118)
Family Milacidae Ellis, 1926 (55)
Family Parmacellidae P. Fischer, 1856 (1855) (26)
Family Trigonochlamydidae Hesse, 1882 (11)
Infraorder Oleacinoidei (497)
Infraorder Orthalicoidei (1 578)
Infraorder Partuloinei accepted as Pupilloidei
Infraorder Pupilloidei (3 436)
Infraorder Rhytidoidei (581)
Infraorder Sagdoinei accepted as Helicoidei
Infraorder Succineoidei (384)
Suborder Orthurethra accepted as Pupilloidei
Suborder Scolodontina (165)
Suborder Sigmurethra accepted as Helicina
Suborder Stylommatophora incertae sedis (75)
Order Systellommatophora (224)
Superorder Hygrophila (2 005)
Superorder Pneumopulmonata
Superorder Pylopulmonata (4 285)
Superorder Sacoglossa (391)
Superorder Siphonarimorpha (163)
Order Anaspidea accepted as Aplysiida
Order Aplysiida (101)
Order Aplysiomorpha accepted as Aplysiida
Order Archaeopulmonata accepted as Siphonarioidea Gray, 1827
Order Bullomorpha accepted as Cephalaspidea
Order Cephalaspidea (1 034)
Order Heterostropha accepted as Pyramidellidae J. E. Gray, 1840
Order Pteropoda (414)
Order Runcinacea accepted as Runcinida
Order Runcinida (80)
Order Tectibranchiata
Order Thecosomata
Order Umbraculida (15)
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