Between brackets is the number of accepted species

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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)
- Superfamily Helicoidea Rafinesque, 1815 (5 491)
- Family Ariantidae Mörch, 1864 accepted as Ariantinae Mörch, 1864
- Family Bradybaenidae Pilsbry, 1934 (1898) accepted as Camaenidae Pilsbry, 1895
- Family Calyciidae Iredale, 1941 accepted as Hadrinae Iredale, 1937
- Family Camaenidae Pilsbry, 1895 (2 898)
- Subfamily Aegistinae Kuroda & Habe, 1949 accepted as Aegistini Kuroda & Habe, 1949
- Subfamily Amphidrominae Kobelt, 1902 accepted as Camaeninae Pilsbry, 1895
- Subfamily Bradybaeninae Pilsbry, 1934 (1898) (763)
- Subfamily Camaeninae Pilsbry, 1895 (600)
- Genus Albersia H. Adams, 1865 (4)
- Genus Aleatelix Iredale, 1941 accepted as Sulcobasis Tapparone Canefri, 1883
- Genus Amphicoelina Zilch, 1960 (4)
- Genus Amphidromus Albers, 1850 (265)
- Genus Amphidronus Albers, 1850 accepted as Amphidromus Albers, 1850
- Genus Anceyoconcha S. Tumpeesuwan & C. Tumpeesuwan, 2020 (6)
- Genus Annakelea Iredale, 1933 accepted as Thersites L. Pfeiffer, 1855
- Genus Australgibba Iredale, 1933 accepted as Cristigibba Tapparone Canefri, 1883
- Genus Beddomea G. Nevill, 1878 (7)
- Genus Bellatrachia Schileyko, 2018 (2)
- Genus Bouchetcamaena Thach, 2018 (13)
- Genus Burmochloritis Godwin-Austen, 1920 (17)
- Genus Camaena Albers, 1850 (51)
- Genus Camaenella Pilsbry, 1893 (3)
- Genus Carata [sic] accepted as Camaena arata (G. B. Sowerby I, 1841)
- Genus Cryptaegis W. F. Clapp, 1923 (1)
- Genus Dentichloritis Páll-Gergely & Neubert, 2019 (1)
- Genus Discoconcha I. Rensch, 1935 (2)
- Species Discoconcha isis (L. Pfeiffer, 1860)
- Species Discoconcha majuscula (L. Pfeiffer, 1857)
- Subspecies Discoconcha majuscula atalanta (Clench, 1933)
- Subspecies Discoconcha majuscula isis (L. Pfeiffer, 1860) accepted as Discoconcha isis (L. Pfeiffer, 1860)
- Subspecies Discoconcha majuscula majuscula (L. Pfeiffer, 1857)
- Subspecies Discoconcha majuscula taeniata I. Rensch, 1940
- Genus Disteustoma Iredale, 1941 (9)
- Genus Dorcasidea Iredale, 1941 (1)
- Genus Entadella Páll-Gergely & Hunyadi, 2016 (5)
- Genus Erigone Albers, 1850 accepted as Chloritis (Eustomopsis) Gude, 1906
- Genus Eucochlias G. Nevill, 1878 accepted as Camaena Albers, 1850
- Genus Eurystoma Albers, 1850 accepted as Trachia E. von Martens, 1860
- Genus Exilibadistes Iredale, 1937 accepted as Cupedora Iredale, 1937
- Genus Findomelon Iredale, 1937 accepted as Cupedora Iredale, 1937
- Genus Gallina Hartmann, 1843 accepted as Obba H. Beck, 1837
- Genus Ganesella W. T. Blanford, 1863 (62)
- Genus Gemitelix Iredale, 1941 (1)
- Genus Giardia Ancey, 1907 accepted as Anceyoconcha S. Tumpeesuwan & C. Tumpeesuwan, 2020
- Genus Globotrochus F. Haas, 1935 (2)
- Genus Goldielix Iredale, 1941 accepted as Sulcobasis Tapparone Canefri, 1883
- Genus Goniodromus Bülow, 1905 accepted as Amphidromus (Goniodromus) Bülow, 1905
- Genus Gonobaudinia Iredale, 1933 accepted as Baudinella Thiele, 1931
- Genus Halmatorhagada Iredale, 1933 accepted as Glyptorhagada Pilsbry, 1890
- Genus Helerigone Strand, 1910 accepted as Chloritis (Eustomopsis) Gude, 1906
- Genus Idamera Iredale, 1939 accepted as Plectorhagada Iredale, 1933
- Genus Janira Albers, 1850 accepted as Oreobba Pilsbry, 1894
- Genus Kendallena Iredale, 1941 (2)
- Genus Magitrachia Iredale, 1941 accepted as Torresitrachia Iredale, 1939
- Genus Mecyntera Iredale, 1941 (1)
- Genus Meracomelon Iredale, 1937 accepted as Cupedora Iredale, 1937
- Genus Micardista Iredale, 1933 accepted as Hadra E. von Martens, 1860
- Genus Moellendorffia Ancey, 1887 (12)
- Genus Moellendorffiella Pilsbry, 1905 (3)
- Genus Neocepolis Pilsbry, 1891 (2)
- Genus Neotrachia Schileyko, 2018 (1)
- Genus Obba H. Beck, 1837 (36)
- Genus Obbiberus F. Haas, 1935 (1)
- Genus Obbina C. Semper, 1873 accepted as Obba H. Beck, 1837
- Genus Opterigone Iredale, 1941 accepted as Discoconcha I. Rensch, 1935
- Genus Oreobba Pilsbry, 1894 (1)
- Genus Parvisheba Iredale, 1958 accepted as Chloritis (Eustomopsis) Gude, 1906
- Genus Perochlora Iredale, 1939 accepted as Setobaudinia Iredale, 1933
- Genus Philidora de Morgan, 1886 accepted as Obba H. Beck, 1837
- Genus Philina Albers, 1850 accepted as Obba H. Beck, 1837
- Genus Proctostoma Mabille, 1887 accepted as Moellendorffia Ancey, 1887
- Genus Pseudobba Möllendorff, 1891 (3)
- Genus Pseudopartula L. Pfeiffer, 1856 (15)
- Genus Pseudostegodera M. Wu & Z.-Y. Chen, 2021 (1)
- Genus Pseudotrachia Schileyko, 2018 (1)
- Genus Ptychochloritis Möllendorff, 1902 accepted as Chloritis H. Beck, 1837
- Genus Pusiodon Swainson, 1840 accepted as Obba H. Beck, 1837
- Genus Rhytidoconcha I. Rensch, 1933 (2)
- Genus Semotrachia Iredale, 1937 accepted as Catellotrachia Iredale, 1933
- Genus Setogibba Iredale, 1941 accepted as Cristigibba Tapparone Canefri, 1883
- Genus Sheba Iredale, 1941 accepted as Chloritis (Eustomopsis) Gude, 1906
- Genus Spatiolabia Iredale, 1941 accepted as Cristigibba Tapparone Canefri, 1883
- Genus Spernachloritis Iredale, 1933 accepted as Catellotrachia Iredale, 1933
- Genus Stegodera E. von Martens, 1876 (1)
- Genus Syndromus Pilsbry, 1900 accepted as Amphidromus (Syndromus) Pilsbry, 1900
- Genus Timasenus Iredale, 1941 accepted as Sulcobasis Tapparone Canefri, 1883
- Genus Trachia E. von Martens, 1860 (25)
- Genus Trachychloritis F. Haas, 1934
- Genus Tradeustoma Iredale, 1941 (1)
- Genus Trichelix Ancey, 1887 (7)
- Genus Trichochloritis Pilsbry, 1891 (26)
- Genus Trochomorphoides G. Nevill, 1878 accepted as Ganesella W. T. Blanford, 1863
- Genus Varohadra Iredale, 1933 accepted as Sphaerospira Mörch, 1867
- Genus Verdichloritis Clench, 1957 accepted as Chloritis (Eustomopsis) Gude, 1906
- Genus Vulnus Sykes, 1904 (3)
- Subfamily Cristovalinae Schileyko, 2003 accepted as Hadrinae Iredale, 1937
- Subfamily Hadrinae Iredale, 1937 (1 165)
- Subfamily Helicostylinae Ihering, 1909 (1890) (343)
- Subfamily Papuininae Iredale, 1938 accepted as Hadrinae Iredale, 1937
- Subfamily Pfeifferiinae Gray, 1855 accepted as Helicostylinae Ihering, 1909 (1890)
- Subfamily Sinumeloninae Solem, 1992 accepted as Hadrinae Iredale, 1937
- Subfamily Xanthomelontinae Iredale, 1937 accepted as Hadrinae Iredale, 1937
- Genus Amphicoelina F. Haas, 1933 accepted as Amphicoelina Zilch, 1960
- Genus Archaeoxesta Kobelt, 1909 † (1)
- Genus Geotrochus Swainson, 1840 accepted as Helix (Papuina) E. von Martens, 1860
- Genus Gracillinoconcha W. Yü & X.-Q. Zhang, 1982 † (1)
- Genus Hodopoeus Pilsbry & T. D. A. Cockerell, 1945 † (2)
- Genus Iforasia J.-C. Fischer, 1963 † (1)
- Genus Indocamaena Thach, 2023 (2)
- Genus Kanabohelix Pilsbry, 1927 † (1)
- Genus Kenyirus Clements & Tan, 2012 (3)
- Genus Limonohelix W. Yü & X.-Q. Zhang, 1982 † (3)
- Genus Miocenehadra T. Habe & Itoigawa, 1976 † (2)
- Genus Multiscapta W. Yü, 1982 † (3)
- Genus Ogeramua Christensen, 2017 (2)
- Genus Papuanella Clench & R. D. Turner, 1959 accepted as Ogeramua Christensen, 2017
- Genus Philbouchetia Thach, 2020 (1)
- Genus Planodoma W. Yü & H.-Z. Pan, 1982 † (1)
- Genus Sanshuispira W. Yü & X.-Q. Zhang, 1982 † (3)
- Genus Sinocamaena M. Wu, 2024 (1)
- Family Canariellidae Schileyko, 1991 (56)
- Family Cepolidae Ihering, 1909 (102)
- Family Chloritidae Iredale, 1938 accepted as Hadrinae Iredale, 1937
- Family Cochlicellidae Schileyko, 1972 accepted as Cochlicellini Schileyko, 1972
- Family Cochlicellinae Schileyko, 1972 accepted as Cochlicellini Schileyko, 1972
- Family Cochlostylidae Möllendorff, 1890 accepted as Helicostylinae Ihering, 1909 (1890)
- Family Echinichidae F. G. Thompson & Naranjo-García, 2012 accepted as Echinichinae F. G. Thompson & Naranjo-García, 2012
- Family Elonidae E. Gittenberger, 1977 (63)
- Family Epiphragmophoridae Hoffmann, 1928 (72)
- Family Eulotidae Möllendorff, 1898 accepted as Bradybaenini Pilsbry, 1934 (1898)
- Family Geomitridae C. R. Boettger, 1909 (402)
- Family Helicellidae Ihering, 1909 accepted as Hygromiidae Tryon, 1866
- Family Helicidae Rafinesque, 1815 (500)
- Family Helicodontidae Kobelt, 1904 (26)
- Family Helminthoglyptidae Pilsbry, 1939 accepted as Helminthoglyptinae Pilsbry, 1939
- Family Humboldtianidae Pilsbry, 1939 accepted as Humboldtianinae Pilsbry, 1939
- Family Hygromiidae Tryon, 1866 (460)
- Family Jacostidae Pilsbry, 1948 accepted as Helicellini Ihering, 1909
- Family Labyrinthidae Borrero, Sei, D. G. Robinson & Rosenberg, 2017 (58)
- Family Lampadiidae Winckworth, 1945 accepted as Labyrinthidae Borrero, Sei, D. G. Robinson & Rosenberg, 2017
- Family Leucochroidae Westerlund, 1886 accepted as Sphincterochilinae Zilch, 1960 (1886)
- Family Lysinoidae Hoffmann, 1928 accepted as Lysinoinae Hoffmann, 1928
- Family Monadeniidae H. Nordsieck, 1987 accepted as Monadeniinae H. Nordsieck, 1987
- Family Papuinidae Iredale, 1938 accepted as Hadrinae Iredale, 1937
- Family Pentataeniidae Mörch, 1864 accepted as Helicini Rafinesque, 1815
- Family Planispiridae Iredale, 1941 accepted as Hadrinae Iredale, 1937
- Family Pleurodontidae Ihering, 1912 (57)
- Family Polygyridae Pilsbry, 1895 (311)
- Family Rhagadidae Iredale, 1938 accepted as Hadrinae Iredale, 1937
- Family Sphincterochilidae Zilch, 1960 (1886) (41)
- Family Thysanophoridae Pilsbry, 1926 (42)
- Family Trichodiscinidae H. Nordsieck, 1987 (11)
- Family Trissexodontidae H. Nordsieck, 1987 (46)
- Family Xanthonychidae Strebel & Pfeffer, 1880 (345)
- Tribe Canariellini Schileyko, 1991 accepted as Canariellidae Schileyko, 1991
- Genus Laxecostula Harzhauser & Neubauer, 2020 † (1)
- Superfamily Sagdoidea Pilsbry, 1895 (199)
- Infraorder Limacoidei (4 251)
- 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