Between brackets is the number of accepted species
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- Mollusca (133 313)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 086)
- Class Caudofoveata (143)
- Class Cephalopoda (1 921)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (103 049)
- Subclass Amphigastropoda † (434)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 849)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 921)
- Superfamily Ampullarioidea Gray, 1824 (250)
- Superfamily Cyclophoroidea J. E. Gray, 1847 (3 907)
- 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 (1 605)
- 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 (422)
- Subfamily Liareinae A. W. B. Powell, 1946 (49)
- Subfamily Pupinellinae Kobelt, 1902 (151)
- Subfamily Pupininae L. Pfeiffer, 1853 (196)
- Genus Alpinipupina J. Stanisic, 2010 (1)
- Genus Ambipupina Iredale, 1937 accepted as Necopupina Iredale, 1937
- Genus Callia J. E. Gray, 1840 accepted as Callianella R. B. Newton, 1891
- Genus Callianella R. B. Newton, 1891 (6)
- Genus Chuatienpupa D. S. Do & T. S. Nguyen, 2023 (1)
- Genus Cordillerapina J. Stanisic, 2010 (1)
- Genus Diplopupina Iredale, 1937 accepted as Signepupina Iredale, 1937
- Genus Dolopupina Iredale, 1937 accepted as Signepupina Iredale, 1937
- Genus Estopupina Iredale, 1937 accepted as Necopupina Iredale, 1937
- Genus Eupupina L. Pfeiffer, 1875 accepted as Pupina Vignard, 1829
- Genus Hargravesia H. Adams, 1871 (5)
- Genus Helaposa Iredale, 1941 accepted as Signepupina Iredale, 1937
- Genus Hildapina Iredale, 1940 (2)
- Genus Hyalopsis Pease, 1871 accepted as Hargravesia H. Adams, 1871
- Genus Kanapa Clench, 1949 accepted as Pupina (Kanapa) Clench, 1949 (1)
- Genus Lopupina Iredale, 1937 accepted as Signepupina Iredale, 1937
- Genus Mesostoma Heude, 1886 accepted as Tylotoechus Kobelt & Möllendorff, 1897
- Genus Moulinsia Grateloup, 1840 (19)
- Genus Necopupina Iredale, 1937 (9)
- Genus Parpupina Iredale, 1937 accepted as Signepupina Iredale, 1937
- Genus Porocallia Möllendorff, 1893 (7)
- Genus Pupina Vignard, 1829 (73)
- Genus Pupinesia Clench, 1949 accepted as Pupina (Pupinesia) Clench, 1949
- Genus Pupinoa Clench, 1949 accepted as Pupina (Pupinoa) Clench, 1949 (1)
- Genus Signepupina Iredale, 1937 (21)
- Genus Siphonostyla Kobelt, 1897 (2)
- Genus Suavocallia Wenz, 1938 (4)
- Genus Sulapina Maassen & Kittel, 1996 (1)
- Genus Tylotoechus Kobelt & Möllendorff, 1897 (42)
- Species Tylotoechus abbasi Thach, 2017
- Species Tylotoechus anceyi (Bavay & Dautzenberg, 1899) accepted as Pupina anceyi Bavay & Dautzenberg, 1899
- Species Tylotoechus artatus (W. H. Benson, 1856) accepted as Pupina artata W. H. Benson, 1856
- Species Tylotoechus arula (W. H. Benson, 1856)
- Species Tylotoechus arulus (W. H. Benson, 1856) accepted as Tylotoechus arula (W. H. Benson, 1856)
- Subspecies Tylotoechus arulus arulus (W. H. Benson, 1856) accepted as Tylotoechus arula (W. H. Benson, 1856)
- Subspecies Tylotoechus arulus perakensis (Möllendorff, 1891) accepted as Tylotoechus perakensis (Möllendorff, 1891)
- Species Tylotoechus aureolus (Stoliczka, 1872) accepted as Pupina aureola Stoliczka, 1872
- Species Tylotoechus aureus (Hinds, 1842) accepted as Pupina aurea Hinds, 1842
- Species Tylotoechus beddomei (Ancey, 1895)
- Species Tylotoechus bicanaliculatus (G. B. Sowerby II, 1842)
- Species Tylotoechus bilabiatus (Jirapatrasilp, 2022)
- Species Tylotoechus billeti (H. Fischer, 1898) accepted as Pupina billeti H. Fischer, 1898
- Species Tylotoechus bilobatus (E. von Martens, 1900)
- Species Tylotoechus bipalatalis (O. Boettger, 1890) accepted as Pupina bipalatalis O. Boettger, 1890
- Species Tylotoechus blanfordi (Theobald, 1864) accepted as Pupina peguensis W. H. Benson, 1860
- Species Tylotoechus calamianicus (Quadras & Möllendorff, 1894)
- Species Tylotoechus cookei Clench, 1949
- Species Tylotoechus crosseanus (Morlet, 1883)
- Species Tylotoechus degneri (Laidlaw, 1957)
- Species Tylotoechus destructus (Heude, 1885)
- Species Tylotoechus doriae (Godwin-Austen, 1889)
- Species Tylotoechus dorri (Dautzenberg, 1894) accepted as Pupina dorri Dautzenberg, 1894
- Species Tylotoechus evansi (Godwin-Austen, 1889)
- Species Tylotoechus everetti (E. A. Smith, 1894)
- Species Tylotoechus excisus (Möllendorff, 1902)
- Species Tylotoechus exclamationis (Mabille, 1887)
- Species Tylotoechus godwinausteni (Jirapatrasilp, 2022)
- Species Tylotoechus guimarasensis (G. Nevill, 1881)
- Species Tylotoechus hosei (Godwin-Austen, 1889)
- Species Tylotoechus hungerfordianus (G. Nevill, 1878) accepted as Pupina hungerfordiana G. Nevill, 1878
- Species Tylotoechus hyptiostoma (Quadras & Möllendorff, 1894)
- Species Tylotoechus imbriciferus (W. H. Benson, 1856)
- Species Tylotoechus josephi (Möllendorff, 1894)
- Species Tylotoechus juedelliana (Möllendorff, 1883)
- Species Tylotoechus junghuhni (E. von Martens, 1867) accepted as Pupina junghuhni E. von Martens, 1867
- Species Tylotoechus laffonti (Ancey, 1899) accepted as Pupina laffonti Ancey, 1898
- Species Tylotoechus laszlowagneri (Greķe, 2012)
- Species Tylotoechus limitaneus (Godwin-Austen, 1897) accepted as Pupina limitanea Godwin-Austen, 1897
- Species Tylotoechus lowi (de Morgan, 1886) accepted as Pupina lowi de Morgan, 1886
- Species Tylotoechus mouhoti (L. Pfeiffer, 1861)
- Species Tylotoechus nana (Möllendorff, 1890)
- Species Tylotoechus nasuta (E. A. Smith, 1895)
- Species Tylotoechus nicobaricus (L. Pfeiffer, 1854)
- Species Tylotoechus ottonis (Dohrn, 1862)
- Species Tylotoechus ovalis (Hedley, 1891)
- Species Tylotoechus pallens (Möllendorff, 1894) accepted as Pupina pallens Möllendorff, 1894
- Species Tylotoechus paviei (Morlet, 1883) accepted as Pupina paviei Morlet, 1883
- Species Tylotoechus peguensis (W. H. Benson, 1860)
- Species Tylotoechus perakensis (Möllendorff, 1891)
- Species Tylotoechus pfeifferianus (H. Adams, 1869)
- Species Tylotoechus porcellanus (Rochebrune, 1882)
- Species Tylotoechus pulchellus (Möllendorff, 1881)
- Species Tylotoechus rufilabris (Dohrn, 1881)
- Species Tylotoechus siamensis (Möllendorff, 1902)
- Species Tylotoechus solidula (Möllendorff, 1901) accepted as Pupina solidula Möllendorff, 1901
- Species Tylotoechus spectabilis (Quadras & Möllendorff, 1894)
- Species Tylotoechus striatella (Quadras & Möllendorff, 1894)
- Species Tylotoechus sucinacia (O. Boettger, 1890) accepted as Tylotoechus junghuhni (E. von Martens, 1867)
- Species Tylotoechus superba (L. Pfeiffer, 1855)
- Species Tylotoechus tchehelensis (de Morgan, 1886) accepted as Pupina tchehelensis de Morgan, 1886
- Species Tylotoechus tongupensis (Godwin-Austen, 1897) accepted as Pupina tongupensis Godwin-Austen, 1897
- Species Tylotoechus tonkiana (Bavay & Dautzenberg, 1899) accepted as Pupinella illustris (Mabille, 1887)
- Species Tylotoechus treubi (O. Boettger, 1890) accepted as Pupina treubi O. Boettger, 1890
- Species Tylotoechus turgidulus (Dohrn, 1881)
- Species Tylotoechus verbeeki (Möllendorff, 1897)
- Species Tylotoechus vescoi (Morelet, 1863)
- Subfamily Realiinae L. Pfeiffer, 1853 accepted as Liareinae A. W. B. Powell, 1946
- Genus Badchisestis Korobkov, 1964 † (3)
- Genus Burminella Balashov, Perkovsky & Vasilenko, 2021 † (1)
- Genus Calliopsis Wenz, 1923 † accepted as Protocallia Wenz, 1925 †
- Genus Cretadiostoma T.-T. Yu, D. Zhuo & Páll-Gergely, 2023 † (2)
- Genus Cretatortulosa T. Yu, B. Wang & H. Pan, 2018 † (3)
- Genus Cyclomastoma Hrubesch, 1965 † (1)
- Genus Ischurostoma Bourguignat, 1874 † (12)
- Genus Macropupina D. A. Bullis, Herhold, Czekanski-Moir, Grimaldi & Rundell, 2020 † (1)
- Genus Mellaca Mabille, 1889 accepted as Pseudopomatias Möllendorff, 1885
- Genus Perlisia Tomlin, 1948 accepted as Tortulosa J. E. Gray, 1847
- Genus Praebadchisestis Hrubesch, 1965 † (1)
- Genus Protocallia Wenz, 1925 † (1)
- Genus Regestoma van Hasselt, 1823 accepted as Registoma van Hasselt, 1823
- Genus Registoma van Hasselt, 1823
- Genus Rognacia Oppenheim, 1895 † (1)
- Genus Xenostoma D. A. Bullis, Herhold, Czekanski-Moir, Grimaldi & Rundell, 2020 † accepted as Euthema T. Yu, B. Wang & H. Pan, 2018 †
- 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 (7 722)
- Order Littorinimorpha (17 231)
- Order Neogastropoda (23 828)
- Order Stenoglossa accepted as Neogastropoda
- Subclass Gastropoda incertae sedis (313)
- Subclass Heterobranchia (39 231)
- Subclass Neomphaliones accepted as Vetigastropoda
- Subclass Neritimorpha (1 916)
- Subclass Orthogastropoda represented as Gastropoda
- Subclass Patellogastropoda (517)
- Subclass Prosobranchia
- Subclass Psilogastropoda represented as Gastropoda
- Subclass Vetigastropoda (6 789)
- 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 (1 381)
- Class Polyplaxiphora accepted as Polyplacophora
- Class Rostroconchia † (64)
- Class Scaphopoda (754)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata
