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- Mollusca (132 888)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 022)
- Class Caudofoveata (143)
- Class Cephalopoda (1 838)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 777)
- Subclass Amphigastropoda † (396)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 684)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 919)
- Superfamily Ampullarioidea Gray, 1824 (250)
- Superfamily Cyclophoroidea J. E. Gray, 1847 (3 905)
- Family Aciculidae J. E. Gray, 1850 (104)
- 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 (1 604)
- Subfamily Alycaeinae W. T. Blanford, 1864 (370)
- Genus Alcaeus [sic] accepted as Alycaeus J. E. Gray, 1850
- Genus Alycaeus J. E. Gray, 1850 (9)
- Genus Alycoeus [sic] accepted as Alycaeus J. E. Gray, 1850
- Genus Awalycaeus Kuroda, 1951 accepted as Dicharax Kobelt & Möllendorff, 1900
- Genus Chamalycaeus Möllendorff, 1897 (32)
- Subgenus Chamalycaeus (Chamalycaeus) Möllendorff, 1897 accepted as Chamalycaeus Möllendorff, 1897
- Subgenus Chamalycaeus (Cipangocharax) Kuroda, 1943 accepted as Dicharax Kobelt & Möllendorff, 1900
- Subgenus Chamalycaeus (Dicharax) Kobelt & Möllendorff, 1900 accepted as Dicharax Kobelt & Möllendorff, 1900
- Subgenus Chamalycaeus (Metalycaeus) Pilsbry, 1900 accepted as Metalycaeus Pilsbry, 1900
- Subgenus Chamalycaeus (Raptomphalus) Godwin-Austen, 1914 accepted as Metalycaeus Pilsbry, 1900
- Subgenus Chamalycaeus (Sigmacharax) Kuroda, 1943 accepted as Dicharax Kobelt & Möllendorff, 1900
- Subgenus Chamalycaeus (Stomacosmethis) Bollinger, 1918 accepted as Stomacosmethis Bollinger, 1918
- Species Chamalycaeus aborensis (Godwin-Austen, 1914) accepted as Metalycaeus aborensis (Godwin-Austen, 1914)
- Species Chamalycaeus aduncus Jirapatrasilp, 2025
- Species Chamalycaeus akhaensis (Godwin-Austen, 1914) accepted as Dicharax akhaensis (Godwin-Austen, 1914)
- Species Chamalycaeus akioi (Kuroda & Abe, 1980) accepted as Dicharax akioi (Kuroda & Abe, 1980)
- Species Chamalycaeus ananensis (Yano, Tada & H. Matsuda, 2013) accepted as Dicharax ananensis (Yano, Tada & H. Matsuda, 2013)
- Species Chamalycaeus andamaniae (W. H. Benson, 1861)
- Species Chamalycaeus armillatus (W. H. Benson, 1856)
- Species Chamalycaeus asaluensis (Godwin-Austen, 1914) accepted as Dicharax asaluensis (Godwin-Austen, 1914)
- Species Chamalycaeus awaensis (Pilsbry & Y. Hirase, 1904) accepted as Metalycaeus satsumanus awaensis (Pilsbry & Y. Hirase, 1904)
- Species Chamalycaeus bicrenatus (Godwin-Austen, 1874) accepted as Dicharax bicrenatus (Godwin-Austen, 1874)
- Species Chamalycaeus biexcisus (Pilsbry, 1902) accepted as Dicharax biexcisus (Pilsbry, 1902)
- Species Chamalycaeus birugosus (Godwin-Austen, 1893) accepted as Dicharax birugosus (Godwin-Austen, 1893)
- Species Chamalycaeus brahma (Godwin-Austen, 1914) accepted as Metalycaeus brahma (Godwin-Austen, 1886)
- Species Chamalycaeus buaboke Páll-Gergely & A. Reischütz, 2021
- Species Chamalycaeus busbyi (Godwin-Austen, 1893)
- Species Chamalycaeus canaliculatus (Möllendorff, 1894)
- Species Chamalycaeus canaliculus (Godwin-Austen, 1914) accepted as Dicharax birugosus (Godwin-Austen, 1893)
- Species Chamalycaeus celebensis (E. von Martens, 1891)
- Species Chamalycaeus chennelli (Godwin-Austen, 1886) accepted as Dicharax chennelli (Godwin-Austen, 1886)
- Species Chamalycaeus crassicollis van Benthem Jutting, 1959 accepted as Dicharax crassicollis (van Benthem Jutting, 1959)
- Species Chamalycaeus crenatus (Godwin-Austen, 1871) accepted as Dicharax crenatus (Godwin-Austen, 1871)
- Species Chamalycaeus crenulatus (W. H. Benson, 1859) accepted as Metalycaeus crenulatus (W. H. Benson, 1859)
- Species Chamalycaeus crispatus (Godwin-Austen, 1871) accepted as Dicharax crispatus (Godwin-Austen, 1871)
- Species Chamalycaeus cyclophoroides (Pilsbry & Y. Hirase, 1909) accepted as Dicharax cyclophoroides (Pilsbry & Y. Hirase, 1909)
- Species Chamalycaeus daflaensis (Godwin-Austen, 1876) accepted as Dicharax daflaensis (Godwin-Austen, 1876)
- Species Chamalycaeus depressus (Bavay & Dautzenberg, 1912) accepted as Dicharax depressus (Bavay & Dautzenberg, 1912)
- Species Chamalycaeus diagonius (Godwin-Austen, 1871) accepted as Dicharax diagonius (Godwin-Austen, 1871)
- Species Chamalycaeus digitatus (H. F. Blanford, 1871) accepted as Dicharax digitatus (H. F. Blanford, 1871)
- Species Chamalycaeus diplochilus (Möllendorff, 1886) accepted as Dicharax diplochilus (Möllendorff, 1887)
- Species Chamalycaeus distinctus (Godwin-Austen, 1893) accepted as Metalycaeus distinctus (Godwin-Austen, 1893)
- Species Chamalycaeus dolichodeiros (Heude, 1890) accepted as Dicharax dolichodeiros (Heude, 1890)
- Species Chamalycaeus dolichodirus (Heude, 1890) accepted as Chamalycaeus dolichodeiros (Heude, 1890)
- Species Chamalycaeus duoculmen (Godwin-Austen, 1914) accepted as Dicharax duoculmen (Godwin-Austen, 1914)
- Species Chamalycaeus edei (Godwin-Austen, 1914) accepted as Dicharax edei (Godwin-Austen, 1914)
- Species Chamalycaeus erawan Páll-Gergely & Hunyadi, 2021
- Species Chamalycaeus everetti (Godwin-Austen, 1889)
- Species Chamalycaeus excisus (Möllendorff, 1887)
- Species Chamalycaeus expanstoma Minato, 1982 accepted as Dicharax expanstoma (Minato, 1982)
- Species Chamalycaeus expansus (Heude, 1890) accepted as Metalycaeus muciferus (Heude, 1885)
- Species Chamalycaeus expatriatus (W. T. Blanford & H. F. Blanford, 1860) accepted as Dicharax expatriatus (W. T. Blanford & H. F. Blanford, 1860)
- Species Chamalycaeus footei (W. T. Blanford & H. F. Blanford, 1861) accepted as Dicharax footei (W. T. Blanford & H. F. Blanford, 1861)
- Species Chamalycaeus fraterculus (Bavay & Dautzenberg, 1900) accepted as Dicharax fraterculus (Bavay & Dautzenberg, 1900)
- Species Chamalycaeus fruhstorferi (Möllendorff, 1897)
- Species Chamalycaeus harimensis (Pilsbry, 1900) accepted as Dicharax japonicus (E. von Martens, 1865)
- Species Chamalycaeus heudei (Bavay & Dautzenberg, 1900) accepted as Metalycaeus heudei (Bavay & Dautzenberg, 1900)
- Species Chamalycaeus hirasei (Pilsbry, 1900) accepted as Metalycaeus hirasei (Pilsbry, 1900)
- Species Chamalycaeus hirpex Páll-Gergely & A. Reischütz, 2021
- Species Chamalycaeus hungerfordianus (G. Nevill, 1881) accepted as Metalycaeus hungerfordianus (G. Nevill, 1881)
- Species Chamalycaeus inflatus (Godwin-Austen, 1874) accepted as Metalycaeus inflatus (Godwin-Austen, 1874)
- Species Chamalycaeus irmatallus Páll-Gergely, 2021
- Species Chamalycaeus itonis Kuroda, 1943 accepted as Dicharax itonis (Kuroda, 1943)
- Species Chamalycaeus japonicus (E. von Martens, 1865) accepted as Dicharax japonicus (E. von Martens, 1865)
- Species Chamalycaeus jousseaumei (de Morgan, 1885) accepted as Alycaeus jousseaumei de Morgan, 1885
- Species Chamalycaeus kessneri Vermeulen, 1996
- Species Chamalycaeus krabiensis Páll-Gergely & A. Reischütz, 2021
- Species Chamalycaeus kurodai (Pilsbry & Y. Hirase, 1908) accepted as Dicharax spiracellum (A. Adams & Reeve, 1850)
- Species Chamalycaeus kurodatokubeii Minato, 1987 accepted as Dicharax kurodatokubeii (Minato, 1987)
- Species Chamalycaeus laevis (Pilsbry & Y. Hirase, 1909) accepted as Metalycaeus laevis (Pilsbry & Y. Hirase, 1909)
- Species Chamalycaeus lahupaensis (Godwin-Austen, 1914) accepted as Dicharax lahupaensis (Godwin-Austen, 1914)
- Species Chamalycaeus latecostatus (Möllendorff, 1882) accepted as Metalycaeus latecostatus (Möllendorff, 1882)
- Species Chamalycaeus leiodomus Vermeulen & T.-S. Liew, 2022
- Species Chamalycaeus libonensis D.-N. Chen, D.-H. Li & T.-C. Luo, 2003 accepted as Metalycaeus libonensis (D.-N. Chen, D.-H. Li & T.-C. Luo, 2003)
- Species Chamalycaeus longituba (E. von Martens, 1864) accepted as Dicharax longituba (E. von Martens, 1864)
- Species Chamalycaeus luyorensis (Godwin-Austen, 1914) accepted as Metalycaeus luyorensis (Godwin-Austen, 1914)
- Species Chamalycaeus macgregori (Godwin-Austen, 1914) accepted as Metalycaeus macgregori (Godwin-Austen, 1914)
- Species Chamalycaeus magnificus (Godwin-Austen, 1914) accepted as Metalycaeus magnificus (Godwin-Austen, 1914)
- Species Chamalycaeus microconus (Möllendorff, 1887)
- Species Chamalycaeus microdiscus (Möllendorff, 1887) accepted as Dicharax microdiscus (Möllendorff, 1887)
- Species Chamalycaeus mixtus Zilch, 1957
- Species Chamalycaeus miyazakii Takahashi & T. Habe, 1973 accepted as Dicharax miyazakii (Takahashi & T. Habe, 1973)
- Species Chamalycaeus moellendorffi (Kobelt & Möllendorff, 1897) accepted as Dicharax moellendorffi (Kobelt & Möllendorff, 1897)
- Species Chamalycaeus montanus (G. Nevill, 1881) accepted as Dicharax montanus (G. Nevill, 1881)
- Species Chamalycaeus muspratti (Godwin-Austen, 1914) accepted as Dicharax muspratti (Godwin-Austen, 1914)
- Species Chamalycaeus nagaensis (Godwin-Austen, 1871) accepted as Dicharax nagaensis (Godwin-Austen, 1871)
- Species Chamalycaeus nakashimai Minato, 1987 accepted as Dicharax nakashimai (Minato, 1987)
- Species Chamalycaeus nanus (Möllendorff, 1886) accepted as Dicharax diminutus (Heude, 1885)
- Species Chamalycaeus nipponensis (Reinhardt, 1877) accepted as Metalycaeus nipponensis (Reinhardt, 1877)
- Species Chamalycaeus nishii Minato, 2005 accepted as Dicharax nishii (Minato, 2005)
- Species Chamalycaeus nitidus (W. T. Blanford, 1862) accepted as Dicharax nitidus (W. T. Blanford, 1862)
- Species Chamalycaeus oakesi (Godwin-Austen, 1914) accepted as Metalycaeus oakesi (Godwin-Austen, 1914)
- Species Chamalycaeus oglei (Godwin-Austen, 1914)
- Species Chamalycaeus okamurai (M. Azuma, 1980) accepted as Dicharax okamurai (M. Azuma, 1980)
- Species Chamalycaeus okinawaensis K. Uozumi, A. Yamamoto & Habe, 1979 accepted as Dicharax okinawaensis (K. Uozumi, A. Yamamoto & T. Habe, 1979)
- Species Chamalycaeus oligopleuris (Möllendorff, 1887) accepted as Dicharax oligopleuris (Möllendorff, 1887)
- Species Chamalycaeus orthosalpinx Vermeulen & T.-S. Liew, 2022
- Species Chamalycaeus oshimanus (Pilsbry & Y. Hirase, 1904) accepted as Dicharax oshimanus (Pilsbry & Y. Hirase, 1904)
- Species Chamalycaeus panshiensis Chen, 1989 accepted as Dicharax panshiensis (D.-N. Chen, 1989)
- Species Chamalycaeus parvulus (Möllendorff, 1887) accepted as Dicharax parvulus (Möllendorff, 1887)
- Species Chamalycaeus paviei (Bavay & Dautzenberg, 1912) accepted as Metalycaeus heudei (Bavay & Dautzenberg, 1900)
- Species Chamalycaeus perplexus (Godwin-Austen, 1914)
- Species Chamalycaeus physis (W. H. Benson, 1859) accepted as Metalycaeus physis (W. H. Benson, 1859)
- Species Chamalycaeus pilsbryi (Kobelt, 1902) accepted as Dicharax japonicus (E. von Martens, 1865)
- Species Chamalycaeus placenovitas (Minato, 1981) accepted as Dicharax placenovitas (Minato, 1981)
- Species Chamalycaeus plicilabris (Möllendorff, 1886) accepted as Dicharax plicilabris (Möllendorff, 1886)
- Subspecies Chamalycaeus plicilabris multidentatus Yen, 1939 accepted as Dicharax fimbriatus (Bavay & Dautzenberg, 1912)
- Subspecies Chamalycaeus plicilabris plicilabris (Möllendorff, 1886) accepted as Dicharax plicilabris (Möllendorff, 1886)
- Species Chamalycaeus purus (Pilsbry & Y. Hirase, 1904) accepted as Dicharax purus (Pilsbry & Y. Hirase, 1904)
- Species Chamalycaeus rarus Páll-Gergely & Auffenberg, 2019
- Species Chamalycaeus rathouisianus (Heude, 1882) accepted as Metalycaeus rathouisianus (Heude, 1882)
- Species Chamalycaeus reinhardti (Mörch, 1872)
- Species Chamalycaeus reticulatus (Möllendorff, 1897)
- Species Chamalycaeus richthofeni (W. T. Blanford, 1863)
- Species Chamalycaeus satsumanus (Pilsbry, 1902) accepted as Metalycaeus satsumanus (Pilsbry, 1902)
- Species Chamalycaeus sculptilis (W. H. Benson, 1856)
- Species Chamalycaeus serratus Páll-Gergely & Auffenberg, 2021
- Species Chamalycaeus shiibaensis Minato, 2005 accepted as Dicharax shiibaensis (Minato, 2005)
- Species Chamalycaeus specus (Godwin-Austen, 1889)
- Species Chamalycaeus spiratus Páll-Gergely, 2021
- Species Chamalycaeus stoliczkai (Godwin-Austen, 1874) accepted as Dicharax stoliczkii (Godwin-Austen, 1874)
- Species Chamalycaeus stoliczkii (Godwin-Austen, 1874) accepted as Dicharax stoliczkii (Godwin-Austen, 1874)
- Species Chamalycaeus strigatus (Godwin-Austen, 1874) accepted as Dicharax strigatus (Godwin-Austen, 1874)
- Species Chamalycaeus subfossilis (P. Sarasin & F. Sarasin, 1899)
- Species Chamalycaeus subinflatus (Godwin-Austen, 1914) accepted as Metalycaeus subinflatus (Godwin-Austen, 1914)
- Species Chamalycaeus sumatranus (E. von Martens, 1900)
- Species Chamalycaeus tadai Kuroda & Kawamoto, 1956 accepted as Dicharax tadai (Kuroda & Kawamoto, 1956)
- Species Chamalycaeus takahashii T. Habe, 1976 accepted as Dicharax takahashii (T. Habe, 1976)
- Species Chamalycaeus tanegashimae (Pilsbry, 1902) accepted as Dicharax tanegashimae (Pilsbry, 1902)
- Species Chamalycaeus tanghali (Godwin-Austen, 1914)
- Species Chamalycaeus tangmaiensis D.-N. Chen & G.-Q. Zhang, 2001 accepted as Dicharax tangmaiensis (D.-N. Chen & G.-Q. Zhang, 2001)
- Species Chamalycaeus tokunoshimanus (Pilsbry & Y. Hirase, 1904) accepted as Dicharax tokunoshimanus (Pilsbry & Y. Hirase, 1904)
- Species Chamalycaeus troglodytes (B. Rensch, 1934)
- Species Chamalycaeus tsushimanus (Pilsbry & Y. Hirase, 1909) accepted as Dicharax tsushimanus (Pilsbry & Y. Hirase, 1909)
- Species Chamalycaeus varius (Pilsbry & Y. Hirase, 1905) accepted as Metalycaeus varius (Pilsbry & Y. Hirase, 1906)
- Species Chamalycaeus vinctus (Pilsbry, 1902) accepted as Metalycaeus vinctus (Pilsbry, 1902)
- Species Chamalycaeus vulcani (W. T. Blanford, 1863)
- Species Chamalycaeus yanoshigehumii Minato, 1987 accepted as Dicharax yanoshigehumii (Minato, 1987)
- Species Chamalycaeus zayuensis W.-H. Zhang, D.-N. Chen & W.-C. Zhou, 2008 accepted as Metalycaeus zayuensis (W.-H. Zhang, D.-N. Chen & W.-C. Zhou, 2008)
- Genus Cipangocharax Kuroda, 1943 accepted as Dicharax Kobelt & Möllendorff, 1900
- Genus Cycloryx Godwin-Austen, 1914 (17)
- Genus Dicharax Kobelt & Möllendorff, 1900 (175)
- Genus Dioryx W. H. Benson, 1859 (27)
- Genus Metalycaeus Pilsbry, 1900 (66)
- Genus Pincerna Preston, 1907 (18)
- Genus Stomacosmethis Bollinger, 1918 (26)
- Subfamily Craspedopomatinae Kobelt & Möllendorff, 1898 accepted as Craspedopomatidae Kobelt & Möllendorff, 1898
- Subfamily Cyclophoridae incertae sedis (36)
- Subfamily Cyclophorinae J. E. Gray, 1847 (1 105)
- 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 Pollicariidae Thiele, 1929 (6)
- Family Pupinidae L. Pfeiffer, 1853 (421)
- 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 (7 677)
- Order Littorinimorpha (17 189)
- Order Neogastropoda (23 752)
- Order Stenoglossa accepted as Neogastropoda
- Subclass Gastropoda incertae sedis (309)
- Subclass Heterobranchia (39 180)
- 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 (6 783)
- 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
