Between brackets is the number of accepted species

Click on "-" to collapse/hide all child taxa
Shows the number of accepted species within the taxon
The last expanded taxon is highlighted
Click on "+" to expand/show all child taxa
Click to see the taxon details page
- 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)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 918)
- Order Caenogastropoda incertae sedis (7 676)
- Order Littorinimorpha (17 179)
- Superfamily Calyptraeoidea Lamarck, 1809 (203)
- Superfamily Capuloidea J. Fleming, 1822 (218)
- Superfamily Cassoidea accepted as Tonnoidea Suter, 1913 (1825)
- Superfamily Cingulopsoidea Fretter & Patil, 1958 (193)
- Superfamily Crepiduloidea J. Fleming, 1822 accepted as Calyptraeoidea Lamarck, 1809
- Superfamily Cypraeoidea Rafinesque, 1815 (1 285)
- Superfamily Eulimoidea R. A. Philippi, 1853 accepted as Vanikoroidea Gray, 1840
- Superfamily Ficoidea Meek, 1864 (1840) (71)
- Superfamily Heteropoda Lamarck, 1812 accepted as Pterotracheoidea Rafinesque, 1814
- Superfamily Hipponicoidea Troschel, 1861 (99)
- Superfamily Littorinoidea Children, 1834 (1 372)
- Superfamily Naticoidea Guilding, 1834 (688)
- Superfamily Pterotracheoidea Rafinesque, 1814 (63)
- Superfamily Rissoacea accepted as Rissooidea Gray, 1847
- Superfamily Rissoinoidea W. Stimpson, 1865 accepted as Rissooidea Gray, 1847
- Superfamily Rissooidea Gray, 1847 (2 311)
- Superfamily Stromboidea Rafinesque, 1815 (835)
- Superfamily Tonnoidea Suter, 1913 (1825) (788)
- Superfamily Truncatelloidea J. E. Gray, 1840 (6 902)
- Family Adeorbidae Monterosato, 1884 accepted as Tornidae Sacco, 1896 (1884)
- Family Amnicolidae Tryon, 1863 (132)
- Family Anabathridae Keen, 1971 (152)
- Family Ascorhiidae Ponder, Nimbs & Shea, 2023 (2)
- Family Assimineidae H. Adams & A. Adams, 1856 (428)
- Family Baicaliidae P. Fischer, 1885 (59)
- Family Beddomeiidae Ponder, Nimbs & Shea, 2023 (58)
- Family Benedictiidae Clessin, 1880 accepted as Benedictiinae Clessin, 1880
- Family Bithyniidae J. E. Gray, 1857 (366)
- Family Bythinellidae Locard, 1893 (213)
- Family Caecidae J. E. Gray, 1850 (286)
- Family Caledoniellidae Rosewater, 1969 (6)
- Family Calopiidae Ponder, 1999 (3)
- Family Circulidae Fretter & Graham, 1962 accepted as Vitrinellidae K. J. Bush, 1897
- Family Clenchiellidae D. W. Taylor, 1966 (14)
- Family Cochliopidae Tryon, 1866 (414)
- Family Coxiellidae Iredale, 1943 accepted as Tomichiidae Wenz, 1938
- Family Ctiloceratidae Iredale & Laseron, 1957 accepted as Ctiloceratinae Iredale & Laseron, 1957
- Family Cyclotropidae Iredale, 1941 accepted as Ekadantinae Thiele, 1929
- Family Elachisinidae Ponder, 1985 (71)
- Family Emmericiidae Brusina, 1870 (46)
- Family Epigridae Ponder, 1985 (4)
- Family Erhaiidae G. M. Davis & Y.-H. Kuo, 1985 (36)
- Family Fairbankiinae Thiele, 1928 accepted as Iravadiidae Thiele, 1928
- Family Falsicingulidae Slavoshevskaya, 1975 (5)
- Family Fontigentidae D. W. Taylor, 1966 (16)
- Family Helicostoidae Pruvot-Fol, 1937 accepted as Helicostoinae Pruvot-Fol, 1937
- Family Hyalidae A. N. Golikov & Starobogatov, 1975 accepted as Iravadiidae Thiele, 1928
- Family Hydrobiidae W. Stimpson, 1865 (2 110)
- Family Hydrococcidae Thiele, 1928 (1)
- Family Iravadiidae Thiele, 1928 (140)
- Family Kolhymamnicolidae Starobogatov, 1983 accepted as Amnicolinae Tryon, 1863
- Family Limnoreidae B. Dybowski, 1911 accepted as Baicaliidae P. Fischer, 1885
- Family Lithoglyphidae Tryon, 1866 (174)
- Family Lithoglyphulidae Radoman, 1973 accepted as Horatiinae D. W. Taylor, 1966
- Family Litthabitellidae Falniowski & Hofman, 2023 (4)
- Family Mesocochliopidae X.-H. Yu, 1987 † (6)
- Family Micromelaniidae B. Dybowski & Grochmalicki, 1913 accepted as Pyrgulinae Brusina, 1882
- Family Micropyrgulidae Radoman, 1973 accepted as Pyrgulinae Brusina, 1882
- Family Moitessieriidae Bourguignat, 1864 (315)
- Family Orientaliidae Radoman, 1973 accepted as Horatiinae D. W. Taylor, 1966
- Family Orientalinidae Radoman, 1978 accepted as Horatiinae D. W. Taylor, 1966
- Family Palaeobaicaliidae Sitnikova & Vinarski, 2023 † (11)
- Family Paludestrinidae R. B. Newton, 1891 accepted as Eatoniellidae Ponder, 1965
- Family Paludinellidae T. Habe, 1976 accepted as Ekadantinae Thiele, 1929
- Family Pomatiopsidae W. Stimpson, 1865 (261)
- Family Potamopyrgidae F. C. Baker, 1928 accepted as Tateidae Thiele, 1925
- Family Pseudomerelininae Starobogatov, 1989 accepted as Iravadiidae Thiele, 1928
- Family Pyrgulidae Brusina, 1882 (1869) accepted as Hydrobiidae W. Stimpson, 1865
- Family Spirostyliferinidae Layton, Middelfart, Tatarnic & N. G. Wilson, 2019 (2)
- Family Squamapicidae L.-J. Zhang & von Rintelen, 2024 (1)
- Family Stenothyridae Tryon, 1866 (123)
- Family Synceratidae Bartsch, 1920 accepted as Assimineinae H. Adams & A. Adams, 1856
- Family Tanousiidae Starobogatov, 1983 accepted as Horatiinae D. W. Taylor, 1966
- Family Tateidae Thiele, 1925 (435)
- Family Teinostomatidae Cossmann, 1917 (111)
- Family Terrestribythinellidae Sitnikova, Starobogatov & V. V. Anistratenko, 1992 accepted as Bythinellidae Locard, 1893
- Family Tomichiidae Wenz, 1938 (29)
- Family Tornidae Sacco, 1896 (1884) (405)
- Family Truncatellidae J. E. Gray, 1840 (125)
- Subfamily Geomelaniinae Kobelt & Möllendorff, 1897 (22)
- Subfamily Truncatellinae J. E. Gray, 1840 (74)
- Genus Blandiella Guppy, 1871 accepted as Truncatella Risso, 1826
- Genus Taheitia H. Adams & A. Adams, 1863 (36)
- Genus Tomlinella Clench & R. D. Turner, 1948 accepted as Truncatella (Tomlinitella) Clench & R. D. Turner, 1948
- Genus Truncatella Risso, 1826 (38)
- Subgenus Truncatella (Blandiella) Guppy, 1871 accepted as Truncatella Risso, 1826
- Subgenus Truncatella (Pupula) Charpentier, 1837 accepted as Pupula Charpentier, 1837
- Subgenus Truncatella (Taheitia) H. Adams & A. Adams, 1863 accepted as Taheitia H. Adams & A. Adams, 1863
- Subgenus Truncatella (Tomlinitella) Clench & R. D. Turner, 1948 accepted as Truncatella Risso, 1826
- Subgenus Truncatella (Truncatella) Risso, 1826 represented as Truncatella Risso, 1826
- Species Truncatella antediluviana Deshayes, 1861 † accepted as Bouryia antediluviana (Deshayes, 1861) †
- Species Truncatella arcasiana Crosse, 1868 accepted as Taheitia arcasiana (Crosse, 1868)
- Species Truncatella arcicostata H.-J. Wang, 1982 †
- Species Truncatella arctecostata Mousson, 1869 accepted as Taheitia scalariformis (Reeve, 1842)
- Species Truncatella atomus R. A. Philippi, 1841 accepted as Omalogyra atomus (R. A. Philippi, 1841)
- Species Truncatella aurantia A. Gould, 1847 accepted as Truncatella guerinii A. Villa & J. B. Villa, 1841
- Species Truncatella avenacea Garrett, 1887
- Species Truncatella bairdiana C. B. Adams, 1852
- Species Truncatella barbadensis L. Pfeiffer, 1857
- Species Truncatella bezanconi Cossmann, 1892 † accepted as Murchisonella bezanconi (Cossmann, 1892) †
- Species Truncatella bilabiata L. Pfeiffer, 1840 accepted as Truncatella pulchella L. Pfeiffer, 1839
- Species Truncatella biornata O. Boettger, 1907 †
- Species Truncatella brazieri J. C. Cox, 1868
- Species Truncatella californica L. Pfeiffer, 1857
- Species Truncatella capillacea L. Pfeiffer, 1859 accepted as Truncatella pulchella L. Pfeiffer, 1839
- Species Truncatella caribaeensis Reeve, 1842
- Species Truncatella caribaeensis Reeve, 1842, sensu Clench & R. D. Turner, 1948 accepted as Truncatella pulchella L. Pfeiffer, 1839
- Species Truncatella caribaensis [sic] accepted as Truncatella caribaeensis Reeve, 1842
- Species Truncatella cerea Gassies, 1878
- Species Truncatella ceylanica L. Pfeiffer, 1857 accepted as Truncatella marginata Küster, 1855
- Species Truncatella clathrus R. T. Lowe, 1832
- Species Truncatella concinna Pease, 1871 accepted as Truncatella guerinii A. Villa & J. B. Villa, 1841
- Species Truncatella costata Cossmann, 1895 † accepted as Truncatella wattebledi Benoist, 1878 †
- Species Truncatella costata L. Pfeiffer, 1839 accepted as Truncatella scalaris (Michaud, 1830)
- Species Truncatella costellifera Pease, 1871 accepted as Truncatella rustica Mousson, 1865
- Species Truncatella costulata Risso, 1826 accepted as Truncatella subcylindrica (Linnaeus, 1767)
- Species Truncatella crassolabia H.-Z. Pan, 1982 †
- Species Truncatella cristata Crosse, 1868 accepted as Truncatella guerinii A. Villa & J. B. Villa, 1841
- Species Truncatella cumingii C. B. Adams, 1845 accepted as Truncatella scalaris (Michaud, 1830)
- Species Truncatella cylindrata Briart & Cornet, 1887 † accepted as Bouryia cylindrata (Briart & Cornet, 1887) †
- Species Truncatella debilis Mousson, 1874 accepted as Truncatella subcylindrica (Linnaeus, 1767)
- Species Truncatella desnoyersii (Payraudeau, 1826) accepted as Truncatella subcylindrica (Linnaeus, 1767)
- Species Truncatella diaphana Gassies, 1869
- Species Truncatella directa Y.-T. Li, 1988 †
- Species Truncatella distensa Cossmann, 1888 † accepted as Bouryia distensa (Cossmann, 1888) †
- Species Truncatella dubiosa C. B. Adams, 1852
- Species Truncatella elongata L. Pfeiffer, 1856 accepted as Geomelania elongata (L. Pfeiffer, 1856)
- Species Truncatella expansilabris Quadras & Möllendorff, 1894
- Species Truncatella fasciata Tapparone Canefri, 1886 accepted as Truncatella guerinii A. Villa & J. B. Villa, 1841
- Species Truncatella ferruginea J. C. Cox, 1868 accepted as Truncatella guerinii A. Villa & J. B. Villa, 1841
- Species Truncatella filicosta Poey, 1858 accepted as Geomelania elongata (L. Pfeiffer, 1856)
- Species Truncatella floridana Hubricht, 1983 accepted as Truncatella pulchella L. Pfeiffer, 1839
- Species Truncatella funiculus Mousson, 1870 accepted as Taheitia funiculus (Mousson, 1870)
- Species Truncatella fusca R. A. Philippi, 1841 accepted as Setia fusca (R. A. Philippi, 1841)
- Species Truncatella futunaensis Mousson, 1871 accepted as Truncatella rustica Mousson, 1865
- Species Truncatella gracilenta E. A. Smith, 1897 accepted as Taheitia gracilenta (E. A. Smith, 1897)
- Species Truncatella gracilenta W. G. Binney, 1858 accepted as Truncatella californica L. Pfeiffer, 1857
- Species Truncatella granum Garrett, 1872
- Species Truncatella guadalupensis Pilsbry, 1901
- Species Truncatella guerinii A. Villa & J. B. Villa, 1841
- Species Truncatella haitensis Weinland, 1876 accepted as Geomelania haitensis (Weinland, 1876)
- Species Truncatella hammerschmidtiana Mousson, 1854
- Species Truncatella hermitei Bardin, 1879 †
- Species Truncatella hubeiensis Y.-T. Li, 1987 †
- Species Truncatella japonica Pilsbry & Y. Hirase, 1905 accepted as Truncatella pfeifferi E. von Martens, 1861
- Species Truncatella jiaozhouensis T.-T. Yu, Salvador, H. Wang, Y.-N. Fang, Neubauer, S. Li, H.-C. Zhang & X.-Q. Wan, 2021 †
- Species Truncatella juliae de Folin, 1872 accepted as Parthenina juliae (de Folin, 1872)
- Species Truncatella kiusiuensis Pilsbry, 1902 accepted as Truncatella pfeifferi E. von Martens, 1861
- Species Truncatella kostejana O. Boettger, 1907 †
- Species Truncatella labiosa Souverbie, 1862 accepted as Truncatella teres L. Pfeiffer, 1857
- Species Truncatella laevigata Risso, 1826 accepted as Truncatella subcylindrica (Linnaeus, 1767)
- Species Truncatella laevissima Kuroda, 1956 accepted as Truncatella pfeifferi E. von Martens, 1861
- Species Truncatella liburnica Stache, 1889 †
- Species Truncatella lirata Poey, 1858 accepted as Geomelania lirata (Poey, 1858)
- Species Truncatella lowei Shuttleworth, 1852 accepted as Truncatella subcylindrica (Linnaeus, 1767)
- Species Truncatella lubrica Held, 1847 accepted as Platyla polita (W. Hartmann, 1840)
- Species Truncatella manchurica (A. Adams, 1861) accepted as Cecina manchurica A. Adams, 1861
- Species Truncatella marginata Küster, 1855
- Species Truncatella mariannarum Quadras & Möllendorff, 1894 accepted as Taheitia mariannarum (Quadras & Möllendorff, 1894)
- Species Truncatella maxima W. Yu & Z.-S. Li, 1983 †
- Species Truncatella micra Tenison Woods, 1878 accepted as Truncatella scalarina J. C. Cox, 1867
- Species Truncatella microlena Monterosato, 1878 accepted as Truncatella subcylindrica (Linnaeus, 1767)
- Species Truncatella minor Briart & Cornet, 1887 † accepted as Bouryia minor (Briart & Cornet, 1887) †
- Species Truncatella minuscula de Folin, 1875 accepted as Graphis albida (Kanmacher, 1798)
- Species Truncatella modesta C. B. Adams, 1851 accepted as Turbonilla rixtae De Jong & Coomans, 1988
- Species Truncatella montagui R. T. Lowe, 1832 accepted as Truncatella subcylindrica (Linnaeus, 1767)
- Species Truncatella oagariensis (Kuroda, 1960)
- Species Truncatella obesa Menke, 1830 accepted as Chondropoma obesum (Menke, 1830)
- Species Truncatella obliqua H.-Z. Pan, 1982 †
- Species Truncatella obscura Morelet, 1881
- Species Truncatella pacifica Pease, 1868 accepted as Truncatella guerinii A. Villa & J. B. Villa, 1841
- Species Truncatella parisiensis Deshayes, 1861 † accepted as Bouryia parisiensis (Deshayes, 1861) †
- Species Truncatella parva Y.-T. Li, 1988 †
- Species Truncatella pellucida Dohrn, 1860 accepted as Truncatella marginata f. pellucida Dohrn, 1860
- Species Truncatella pfeifferi E. von Martens, 1861
- Species Truncatella porrecta A. Gould, 1847 accepted as Taheitia porrecta (A. Gould, 1847)
- Species Truncatella princeps Dohrn, 1866 accepted as Truncatella rostrata A. Gould, 1847
- Species Truncatella pulchella L. Pfeiffer, 1839
- Species Truncatella punctata Monterosato, 1878 accepted as Truncatella subcylindrica (Linnaeus, 1767)
- Species Truncatella quadrasi Möllendorff, 1893
- Species Truncatella rabora H.-Z. Pan, 1982 †
- Species Truncatella reclusa (Guppy, 1871)
- Species Truncatella regina Hubricht, 1983 accepted as Truncatella clathrus R. T. Lowe, 1832
- Species Truncatella rostrata A. Gould, 1847
- Species Truncatella rustica Mousson, 1865
- Species Truncatella sanshuiensis W. Yü & X.-Q. Zhang, 1982 †
- Species Truncatella scalariformis Reeve, 1842 accepted as Taheitia scalariformis (Reeve, 1842)
- Species Truncatella scalariformis C. B. Adams, 1845 accepted as Truncatella scalaris (Michaud, 1830)
- Species Truncatella scalarina J. C. Cox, 1867
- Species Truncatella scalaris (Michaud, 1830)
- Species Truncatella scalaroides E. von Martens, 1864
- Species Truncatella schneideri I. Rensch, 1937 accepted as Taheitia schneideri (I. Rensch, 1937)
- Species Truncatella semicostulata Jickeli, 1874 accepted as Truncatella marginata f. pellucida Dohrn, 1860
- Species Truncatella semperi Kobelt, 1884
- Species Truncatella sinensis Y.-T. Li, 1988 †
- Species Truncatella stimpsonii Stearns, 1872 accepted as Truncatella californica L. Pfeiffer, 1857
- Species Truncatella striata Reeve, 1842 accepted as Coxiella striata (Reeve, 1842)
- Species Truncatella striatula Menke, 1843 accepted as Coxiella striatula (Menke, 1843)
- Species Truncatella subauriculata Quadras & Möllendorff, 1894 accepted as Taheitia mariannarum (Quadras & Möllendorff, 1894)
- Species Truncatella subcylindrica (Linnaeus, 1767)
- Species Truncatella subsulcata Gassies, 1878
- Species Truncatella succinea C. B. Adams, 1845 accepted as Truncatella caribaeensis Reeve, 1842
- Species Truncatella tasmanica Tenison Woods, 1876 accepted as Truncatella scalarina J. C. Cox, 1867
- Species Truncatella tatarica Schrenck, 1861 accepted as Cecina tatarica (Schrenck, 1861)
- Species Truncatella teres L. Pfeiffer, 1857 accepted as Truncatella marginata Küster, 1855
- Species Truncatella thaanumi Clench & R. D. Turner, 1948
- Subspecies Truncatella thaanumi insularis Clench & R. D. Turner, 1948
- Subspecies Truncatella thaanumi thaanumi Clench & R. D. Turner, 1948
- Species Truncatella truncatula (Draparnaud, 1801) accepted as Truncatella subcylindrica (Linnaeus, 1767)
- Species Truncatella turricula Mousson, 1870 accepted as Taheitia turricula (Mousson, 1870)
- Species Truncatella ultima I. Rensch, 1937 accepted as Taheitia ultima (I. Rensch, 1937)
- Species Truncatella valida L. Pfeiffer, 1846 accepted as Truncatella guerinii A. Villa & J. B. Villa, 1841
- Species Truncatella ventricosa Reeve, 1842 accepted as Tomichia ventricosa (Reeve, 1842)
- Species Truncatella vincentiana (Cotton, 1942)
- Species Truncatella vitiana A. Gould, 1847 accepted as Truncatella guerinii A. Villa & J. B. Villa, 1841
- Species Truncatella wattebledi Benoist, 1878 †
- Species Truncatella weixianensis Youluo, 1978 †
- Species Truncatella wrighti L. Pfeiffer, 1862 accepted as Geomelania lirata (Poey, 1858)
- Species Truncatella xuanchengensis H.-Z. Pan, 1982 †
- Species Truncatella yorkensis J. C. Cox, 1868 accepted as Truncatella guerinii A. Villa & J. B. Villa, 1841
- Genus Albertisia Issel, 1880 accepted as Truncatella Risso, 1826
- Genus Eosopyrgula W. Yu, 1983 † (1)
- Genus Fidelis Risso, 1826 accepted as Truncatella Risso, 1826
- Genus Glaucothoe Leach, 1852 accepted as Truncatella Risso, 1826
- Genus Glibertiella Schlickum, 1968 † (2)
- Genus Nystia Tournouër, 1869 † (22)
- Genus Obtusospira W. Yü, 1977 † (1)
- Genus Sandbergerina Kadolsky, 1993 † (3)
- Genus Staadtia Schlickum, 1961 † accepted as Nystia Tournouër, 1869 †
- Family Truncatelloidea incertae sedis (5)
- Family Tutuilanidae Hubendick, 1952 accepted as Omphalotropidinae Thiele, 1927
- Family Vitrinellidae K. J. Bush, 1897 (333)
- Subfamily Fontigentinae D. W. Taylor, 1966 accepted as Fontigentidae D. W. Taylor, 1966
- Subfamily Hemistomiinae Thiele, 1929 accepted as Tateidae Thiele, 1925
- Subfamily Orientalininae Radoman, 1978 accepted as Horatiinae D. W. Taylor, 1966
- Subfamily Stenothyrinae Tryon, 1866 accepted as Stenothyridae Tryon, 1866
- Subfamily Tomichiinae Wenz, 1938 accepted as Tomichiidae Wenz, 1938
- Superfamily Vanikoroidea Gray, 1840 (1 331)
- Superfamily Velutinoidea Gray, 1840 (648)
- Superfamily Vermetoidea Rafinesque, 1815 (172)
- Superfamily Xenophoroidea Troschel, 1852 (1840) accepted as Stromboidea Rafinesque, 1815
- Order Neogastropoda (23 716)
- Order Stenoglossa accepted as Neogastropoda
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 156)
- 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