Between brackets is the number of accepted species

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- Mollusca (132 754)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (24 992)
- Class Caudofoveata (143)
- Class Cephalopoda (1 832)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 679)
- Subclass Amphigastropoda † (387)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 623)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 917)
- Superfamily Ampullarioidea Gray, 1824 (250)
- Superfamily Cyclophoroidea J. E. Gray, 1847 (3 903)
- Family Aciculidae J. E. Gray, 1850 (103)
- Family Acmeidae Pollonera, 1905 accepted as Aciculidae J. E. Gray, 1850
- Family Alycaeidae W. T. Blanford, 1864 accepted as Alycaeinae W. T. Blanford, 1864
- Family Bolaniidae Wenz, 1915 accepted as Craspedopomatidae Kobelt & Möllendorff, 1898
- Family Cochlostomatidae Kobelt, 1902 (118)
- Family Craspedopomatidae Kobelt & Möllendorff, 1898 (21)
- Family Cyclophoridae J. E. Gray, 1847 (1 603)
- Subfamily Alycaeinae W. T. Blanford, 1864 (369)
- Subfamily Craspedopomatinae Kobelt & Möllendorff, 1898 accepted as Craspedopomatidae Kobelt & Möllendorff, 1898
- Subfamily Cyclophoridae incertae sedis (36)
- Subfamily Cyclophorinae J. E. Gray, 1847 (1 105)
- Tribe Caspicyclotini Wenz, 1938 (4)
- Tribe Cyathopomatini Kobelt & Möllendorff, 1897 (132)
- Tribe Cyclophorini J. E. Gray, 1847 (672)
- Genus Afroditropis Bequaert & Clench, 1936 (3)
- Genus Craspedotropis W. T. Blanford, 1864 (8)
- Genus Crossopoma E. von Martens, 1891 (7)
- Genus Cyclohelix Mörch, 1852 accepted as Cyclophorus (Cyclohelix) Mörch, 1852
- Genus Cyclophorus Montfort, 1810 (213)
- Genus Cyclosurus Morelet, 1881 (1)
- Genus Dasytherion Mabille, 1887 accepted as Scabrina W. T. Blanford, 1863
- Genus Dermatocera H. Adams & A. Adams, 1855 accepted as Leptopoma L. Pfeiffer, 1847
- Genus Ditropiphorus H. Fukuda, 2000 accepted as Ditropopsis E. A. Smith, 1897
- Genus Ditropis W. T. Blanford, 1869 accepted as Ditropopsis E. A. Smith, 1897
- Genus Ditropopsis E. A. Smith, 1897 (52)
- Genus Elgonocyclus Verdcourt, 1982 (1)
- Genus Eucyclophorus Möllendorff, 1886 accepted as Cyclophorus Montfort, 1810
- Genus Japonia A. Gould, 1859 (55)
- Subgenus Japonia (Cytora) Kobelt & Möllendorff, 1897 accepted as Cytora Kobelt & Möllendorff, 1897
- Subgenus Japonia (Japonia) A. Gould, 1859 represented as Japonia A. Gould, 1859
- Subgenus Japonia (Lagocheilus) W. T. Blanford, 1864 accepted as Lagocheilus W. T. Blanford, 1864
- Subgenus Japonia (Lagochilus) P. Fischer, 1885 accepted as Lagocheilus W. T. Blanford, 1864
- Subgenus Japonia (Mylicotrochus) P. Sarasin & F. Sarasin, 1899 represented as Japonia A. Gould, 1859
- Species Japonia alticola (Laidlaw, 1937)
- Species Japonia anceps Vermeulen, T.-S. Liew & Schilthuizen, 2015
- Species Japonia balabacensis (E. A. Smith, 1895)
- Species Japonia barbata (A. Gould, 1859) accepted as Japonia gouldi Kobelt, 1902
- Species Japonia bauensis Marzuki, T.-S. Liew & Mohd-Azlan, 2021
- Species Japonia binoyae (Sykes, 1899) accepted as Lagocheilus binoyae (Sykes, 1899)
- Species Japonia boonkioensis Y.-C. Lee, K.-Y. Lue & W.-L. Wu, 2008 accepted as Japonia formosana Pilsbry & Hirase, 1906
- Species Japonia borneensis (E. A. Smith, 1893)
- Species Japonia buehleri Forcart, 1936
- Species Japonia bunguranensis (E. A. Smith, 1894)
- Species Japonia celebensis (P. Sarasin & F. Sarasin, 1899)
- Species Japonia changi C.-C. Hwang, 2015
- Species Japonia cilifera (Mousson, 1849) accepted as Lagocheilus ciliferus (Mousson, 1849)
- Species Japonia ciliocincta (E. von Martens, 1865)
- Species Japonia citharella (A. Gould, 1859)
- Species Japonia clathrata (Heude, 1885)
- Species Japonia concolor (Möllendorff, 1893)
- Species Japonia crossei (Morlet, 1886)
- Species Japonia dido (Godwin-Austen, 1889)
- Species Japonia ditropis Vermeulen & Junau, 2007
- Species Japonia duplifolia C.-C. Hwang, 2015
- Species Japonia fallax B. Rensch, 1931
- Species Japonia formosana Pilsbry & Hirase, 1906
- Species Japonia glabrata (Möllendorff, 1886) accepted as Lagocheilus glabratus Möllendorff, 1886
- Species Japonia gouldi Kobelt, 1902
- Species Japonia gradata (Möllendorff, 1894)
- Species Japonia hagenmulleri (Mabille, 1887)
- Species Japonia hedigeri I. Rensch & B. Rensch, 1935 accepted as Setaepoma hedigeri (I. Rensch & B. Rensch, 1935)
- Species Japonia heteroveina C.-C. Hwang, 2015
- Species Japonia hispida Minato, 1982
- Species Japonia hungerfordiana (Möllendorff, 1881) accepted as Lagocheilus hungerfordianus (Möllendorff, 1881)
- Species Japonia hyalina Vermeulen & Junau, 2007
- Species Japonia inornata (E. A. Smith, 1893)
- Species Japonia inouei Kuroda & Habe, 1961
- Species Japonia janus Vermeulen & T.-S. Liew, 2022
- Species Japonia johnabbasi Thach, 2021
- Species Japonia jucunda (E. A. Smith, 1893)
- Species Japonia junipervallis C.-C. Hwang, 2015
- Species Japonia katorii Minato, 1985
- Species Japonia keppeli (Godwin-Austen, 1889)
- Species Japonia lanyuensis Y.-C. Lee & W.-L. Wu, 2001
- Species Japonia longipila (Möllendorff, 1884) accepted as Lagocheilus longipilus Möllendorff, 1884
- Species Japonia mariei (Morlet, 1886)
- Species Japonia mendicans (Mabille, 1887)
- Species Japonia metcalfei (Issel, 1874)
- Species Japonia michaui (Crosse & P. Fischer, 1863) accepted as Lagocheilus michaui (Crosse & P. Fischer, 1863)
- Species Japonia monggisensis Vermeulen & T.-S. Liew, 2022
- Species Japonia mucronata (Möllendorff, 1888)
- Species Japonia mundyana (Godwin-Austen, 1889)
- Species Japonia musiva (A. Gould, 1859)
- Species Japonia occulta (Sykes, 1899) accepted as Lagocheilus occultus Sykes, 1899
- Species Japonia pellicosta (Möllendorff, 1882) accepted as Lagocheilus pellicosta (Möllendorff, 1882)
- Species Japonia pilosa (Möllendorff, 1884) accepted as Lagocheilus pilosus Möllendorff, 1884
- Species Japonia pngsiar C.-C. Hwang, 2015
- Species Japonia poirierii (Tapparone Canefri, 1883) accepted as Lagocheilus poirieri (Tapparone Canefri, 1883)
- Species Japonia propria (Fulton, 1905) accepted as Japonia quinquelirata (Möllendorff, 1887)
- Species Japonia quinquelirata (Möllendorff, 1887)
- Species Japonia rabongensis (E. A. Smith, 1895)
- Species Japonia sadoensis Pilsbry & Y. Hirase, 1903
- Species Japonia saetigera (van Benthem Jutting, 1958)
- Species Japonia sexfilaris (Heude, 1882) accepted as Lagocheilus sexfilaris (Heude, 1882)
- Species Japonia shigetai Minato, 1985
- Species Japonia sirhassenensis (E. A. Smith, 1894) accepted as Lagocheilus sirhassenensis E. A. Smith, 1894
- Species Japonia striatula Kuroda, 1973
- Species Japonia subcarinata (Möllendorff, 1887)
- Species Japonia subconica (L. Pfeiffer, 1859)
- Species Japonia subrudis Vermeulen & T.-S. Liew, 2022
- Species Japonia tadai C.-C. Hwang, 2015
- Species Japonia tambunanensis Vermeulen & T.-S. Liew, 2022
- Species Japonia tenuipilis (Gredler, 1887)
- Species Japonia thuthaoae Thach, 2021
- Species Japonia tokunoshimana Pilsbry & Y. Hirase, 1904
- Species Japonia toshimana Pilsbry & Y. Hirase, 1904 accepted as Japonia sadoensis Pilsbry & Y. Hirase, 1903
- Species Japonia trichophora (Möllendorff, 1881) accepted as Lagocheilus trichophorus (Möllendorff, 1881)
- Species Japonia trilirata (L. Pfeiffer, 1852)
- Species Japonia trochulus (E. von Martens, 1867)
- Species Japonia vesca (Sykes, 1899) accepted as Lagocheilus vescus (Sykes, 1899)
- Species Japonia wallacei (L. Pfeiffer, 1857)
- Species Japonia zebra Pilsbry & Y. Hirase, 1906 accepted as Pilosphaera zebra (Pilsbry & Y. Hirase, 1906)
- Genus Lagocheilus W. T. Blanford, 1864 (106)
- Genus Laochilus W. T. Blanford, 1864 accepted as Lagocheilus W. T. Blanford, 1864
- Genus Leptopoma L. Pfeiffer, 1847 (126)
- Genus Leptopomatoides E. von Martens, 1880 accepted as Leptopomoides G. Nevill, 1878
- Genus Leptopomoides G. Nevill, 1878 (8)
- Genus Leucoptychia Crosse, 1878 accepted as Leptopoma (Leucoptychia) Crosse, 1878
- Genus Litostylus Kobelt & Möllendorff, 1897 accepted as Cyclophorus (Kobeltostylus) Egorov, 2006
- Genus Micraulax Theobald, 1876 (2)
- Genus Montanopoma J. Stanisic, 2010 (5)
- Genus Myxostoma Troschel, 1847 (3)
- Genus Otopoma J. E. Gray, 1850 (8)
- Genus Owengriffithsius K. C. Emberton, 2002 (6)
- Genus Papuocyclus Ancey, 1895 (1)
- Genus Pilosphaera Y.-C. Lee, K.-U. Lue & W.-L. Wu, 2008 (2)
- Genus Ptychapoma Möllendorff, 1885 accepted as Ptychopoma Möllendorff, 1885
- Genus Ptychopoma Möllendorff, 1885 (22)
- Genus Rhytidorhaphe Möllendorff, 1897 accepted as Papuocyclus Ancey, 1895
- Genus Scabrina W. T. Blanford, 1863 (22)
- Genus Theobaldius G. Nevill, 1878 (21)
- Tribe Cyclotini L. Pfeiffer, 1853 (164)
- Tribe Pterocyclini Kobelt & Möllendorff, 1897 (126)
- Genus Aulopoma Troschel, 1847 (4)
- Genus Pholeoteras Sturany, 1904 (3)
- Subfamily Ferussininae Wenz, 1923 (1915) † (8)
- Subfamily Platyrhaphidinae Páll-Gergely, 2024 (76)
- Subfamily Spirostomatinae Tielecke, 1940 (4)
- Genus Allardia Nicolas, 1898 †
- Genus Diaspira Soós, 1911 accepted as Ditropopsis E. A. Smith, 1897
- Genus Eotrichophorus D. A. Bullis, Herhold, Czekanski-Moir, Grimaldi & Rundell, 2020 † (2)
- Genus Lagochilus P. Fischer, 1885 accepted as Lagocheilus W. T. Blanford, 1864
- Genus Lagochilus W. T. Blanford, 1864 accepted as Lagocheilus W. T. Blanford, 1864
- Genus Perissocyclos D. A. Bullis, Herhold, Czekanski-Moir, Grimaldi & Rundell, 2020 † (1)
- Genus Strophites J. W. Dawson, 1880 † accepted as Dendropupa R. Owen, 1859 †
- Genus Trotopyrgula X.-H. Yu, 1987 † (2)
- Family Cytoridae Climo, 1969 accepted as Liareinae A. W. B. Powell, 1946
- Family Dicristidae A. N. Golikov & Starobogatov, 1975 accepted as Neocyclotidae Kobelt & Möllendorff, 1897
- Family Diplommatinidae L. Pfeiffer, 1856 (1 026)
- Family Ferussinidae Wenz, 1923 (1915) † accepted as Ferussininae Wenz, 1923 (1915) †
- Family Hainesiidae Thiele, 1929 (220)
- Family Lagocheilidae Stoliczka, 1872 accepted as Cyclophoridae J. E. Gray, 1847
- Family Maizaniidae Tielecke, 1940 (40)
- Family Megalomastomatidae W. T. Blanford, 1864 (100)
- Family Megalostomatidae [sic] accepted as Megalomastomatidae W. T. Blanford, 1864
- Family Neocyclotidae Kobelt & Möllendorff, 1897 (242)
- Family Pupinidae L. Pfeiffer, 1853 (427)
- Family Strophostomatidae Wenz, 1915 † accepted as Ferussininae Wenz, 1923 (1915) †
- Genus Carinomphalus W. Yü, 1974 † (1)
- Genus Diplommoptychia Maillard, 1884 †
- Genus Loriolina Huckriede, 1967 † (1)
- Genus Maillardinus Bandel, 1991 † (1)
- Superfamily Viviparoidea Gray, 1847 (764)
- Order Caenogastropoda incertae sedis (7 675)
- Order Littorinimorpha (17 171)
- Order Neogastropoda (23 713)
- Order Stenoglossa accepted as Neogastropoda
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 154)
- 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