Between brackets is the number of accepted species
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- Mollusca (132 851)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 013)
- Class Caudofoveata (143)
- Class Cephalopoda (1 834)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 753)
- Subclass Amphigastropoda † (396)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 670)
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 172)
- Infraclass "Lower Heterobranchia" (1 137)
- Infraclass Euthyneura (37 449)
- Subterclass Acteonimorpha (411)
- Subterclass Ringipleura (2 917)
- Subterclass Tectipleura (34 121)
- Superorder Acochlidiimorpha (48)
- Superorder Ascoglossa accepted as Sacoglossa
- Superorder Basommatophora accepted as Hygrophila
- Superorder Eupulmonata (25 585)
- Order Aillyida accepted as Achatinina
- Order Ellobiida (579)
- Order Gymnomorpha accepted as Systellommatophora
- Order Stylommatophora (24 782)
- Suborder Achatinina (2 912)
- Suborder Elasmognatha accepted as Succineoidei
- Suborder Helicina (21 630)
- Infraorder Arionoidei (140)
- Infraorder Clausilioidei (1 859)
- Infraorder Helicina incertae sedis (3 210)
- Infraorder Helicoidei (5 691)
- 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)
- Superfamily Limacoidei incertae sedis (3)
- Superfamily Parmacelloidea P. Fischer, 1856 (1855)
- Superfamily Trochomorphoidea Mörch, 1864 (1 190)
- Family Chronidae Thiele, 1931 (349)
- Family Dyakiidae Gude & B. B. Woodward, 1921 (102)
- Genus Asperitas Gude, 1911 (12)
- Species Asperitas abbasi Thach, 2018 accepted as Asperitas trochus (O. F. Müller, 1774)
- Species Asperitas abbasi (Thach, 2016) accepted as Indocamaena abbasi (Thach, 2016)
- Species Asperitas ayuae Dharma, 2023
- Species Asperitas bimaensis (Mousson, 1849)
- Species Asperitas cidaris (Lamarck, 1822) accepted as Asperitas trochus (O. F. Müller, 1774)
- Species Asperitas coffea (L. Pfeiffer, 1855)
- Species Asperitas colorata (Mousson, 1849)
- Species Asperitas crystalae Dharma, 2023 accepted as Indocamaena crystalae (Dharma, 2023)
- Species Asperitas everetti (E. A. Smith, 1897)
- Species Asperitas ginoi Falconieri, 1995 accepted as Kalidos ginoi (Falconieri, 1995)
- Species Asperitas inquinata (L. Pfeiffer, 1842)
- Subspecies Asperitas inquinata baaguiae Forcart, 1936 accepted as Asperitas trochus (O. F. Müller, 1774)
- Subspecies Asperitas inquinata babarensis B. Rensch, 1931
- Subspecies Asperitas inquinata batudulangensis B. Rensch, 1931
- Subspecies Asperitas inquinata inquinata (L. Pfeiffer, 1842)
- Subspecies Asperitas inquinata moussoni (L. Pfeiffer, 1849) accepted as Asperitas trochus (O. F. Müller, 1774)
- Subspecies Asperitas inquinata ofuensis B. Rensch, 1931 accepted as Asperitas trochus (O. F. Müller, 1774)
- Subspecies Asperitas inquinata penidae B. Rensch, 1938
- Species Asperitas nemorensis (O. F. Müller, 1774)
- Species Asperitas notabilis (B. Rensch, 1930)
- Species Asperitas rareguttata (Mousson, 1849) accepted as Asperitas trochus (O. F. Müller, 1774)
- Species Asperitas rookmaakeri (B. Rensch, 1930)
- Species Asperitas rugosissima (Möllendorff, 1903) accepted as Asperitas trochus (O. F. Müller, 1774)
- Species Asperitas serpentina B. Rensch, 1934
- Species Asperitas sparsa (Mousson, 1857)
- Species Asperitas stuartiae (L. Pfeiffer, 1845) accepted as Asperitas trochus (O. F. Müller, 1774)
- Species Asperitas trochus (O. F. Müller, 1774)
- Species Asperitas waandersiana (Mousson, 1857) accepted as Asperitas sparsa (Mousson, 1857)
- Genus Bertia Ancey, 1887 (3)
- Genus Craterodiscus McMichael, 1959 (2)
- Genus Dyakia Godwin-Austen, 1891 (18)
- Genus Elaphroconcha Gude, 1911 (12)
- Genus Everettia Godwin-Austen, 1891 (21)
- Genus Inozonites G. Pfeffer, 1883 (13)
- Genus Kalamantania Laidlaw, 1931 (1)
- Genus Khmerquantula Pholyotha & Panha, 2021 (1)
- Genus Phuphania C. Tumpeesuwan, Naggs & Panha, 2007 (3)
- Genus Pliotropis Möllendorff, 1899
- Genus Pseudoplecta Laidlaw, 1932 (1)
- Genus Pseudoquantula Jirapatrasilp & Panha, 2020 (1)
- Genus Quantula H. B. Baker, 1941 (8)
- Genus Rhinocochlis Thiele, 1931 (1)
- Genus Sasakia B. Rensch, 1930 accepted as Sasakina B. Rensch, 1930
- Genus Sasakina B. Rensch, 1930 (5)
- Genus Semperia Godwin-Austen, 1898 accepted as Hemiplecta Albers, 1850
- Family Euconulidae H. B. Baker, 1928 (149)
- Family Geotrochidae Schileyko, 2002 (21)
- Family Microcystidae Thiele, 1931 (331)
- Family Ryssotidae Schileyko, 2003 accepted as Chronidae Thiele, 1931
- Family Staffordiidae Thiele, 1931 (3)
- Family Trochomorphidae Möllendorff, 1890 (235)
- 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 (1 581)
- 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
