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- Mollusca (132 848)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 011)
- Class Caudofoveata (143)
- Class Cephalopoda (1 834)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 752)
- Subclass Amphigastropoda † (396)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 669)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 919)
- Order Caenogastropoda incertae sedis (7 676)
- Order Littorinimorpha (17 189)
- Order Neogastropoda (23 738)
- Superfamily Buccinoidea Rafinesque, 1815 (5 253)
- Family Alectrionidae Dall, 1908 accepted as Nassariinae Iredale, 1916 (1835)
- Family Anachidae A. N. Golikov & Starobogatov, 1972 accepted as Atiliinae Cossmann, 1901
- Family Arculariidae Iredale, 1915 accepted as Nassariinae Iredale, 1916 (1835)
- Family Austrosiphonidae Cotton & Godfrey, 1938 (58)
- Family Belomitridae Kantor, Puillandre, Rivasseau & Bouchet, 2012 (32)
- Family Beringiidae A. N. Golikov & Starobogatov, 1975 accepted as Beringiinae A. N. Golikov & Starobogatov, 1975
- Family Buccinanopsidae Galindo, Puillandre, Lozouet & Bouchet, 2016 (7)
- Family Buccinidae Rafinesque, 1815 (512)
- Family Buccinoidea incertae sedis (154)
- Family Buccinulidae H. J. Finlay, 1928 accepted as Tudiclidae Cossmann, 1901
- Family Busyconidae Wade, 1917 (1867) (33)
- Family Cassidulidae Gray, 1854 accepted as Melongenidae Gill, 1871 (1854)
- Family Chauvetiidae Kantor, Fedosov, Kosyan, Puillandre, Sorokin, Kano, R. Clark & Bouchet, 2021 (61)
- Family Colidae J. E. Gray, 1857 (32)
- Family Colubrariidae Dall, 1904 (162)
- Family Columbellidae Swainson, 1840 (1 201)
- Family Cominellidae J. E. Gray, 1857 (76)
- Family Cyclopsidae Chenu, 1859 accepted as Nassariinae Iredale, 1916 (1835)
- Family Cyrtulidae MacDonald, 1869 accepted as Fusininae Wrigley, 1927
- Family Dolicholatiridae Kantor, Fedosov, Kosyan, Puillandre, Sorokin, Kano, R. Clark & Bouchet, 2021 (43)
- Family Donovaniidae T. L. Casey, 1904 accepted as Chauvetiidae Kantor, Fedosov, Kosyan, Puillandre, Sorokin, Kano, R. Clark & Bouchet, 2021
- Family Echinofulguridae Petuch, 1994 † (15)
- Family Eosiphonidae Kantor, Fedosov, Kosyan, Puillandre, Sorokin, Kano, R. Clark & Bouchet, 2021 (72)
- Family Fasciolariidae Gray, 1853 (883)
- Family Fulguridae Stoliczka, 1867 accepted as Busyconinae Wade, 1917 (1867)
- Family Galeodidae Thiele, 1925 accepted as Melongenidae Gill, 1871 (1854)
- Family Heligmotomidae Adegoke, 1977 † accepted as Melongenidae Gill, 1871 (1854)
- Family Latiridae Iredale, 1929 accepted as Fasciolariinae Gray, 1853
- Family Melongenidae Gill, 1871 (1854) (90)
- Family Nassariidae Iredale, 1916 (1835) (1 083)
- Family Neptuneidae W. Stimpson, 1865 accepted as Neptuneinae W. Stimpson, 1865
- Family Peristerniidae Tryon, 1880 accepted as Peristerniinae Tryon, 1880
- Family Pisaniidae J. E. Gray, 1857 (321)
- Genus Ameranna Landau & Vermeij, 2012 (7)
- Genus Aplus De Gregorio, 1885 (31)
- Genus Appisania Thiele, 1929 accepted as Pisania Bivona e Bernardi, 1832
- Genus Bailya M. Smith, 1944 (14)
- Genus Calicantharus B. L. Clark, 1938 accepted as Pusio J. E. Gray, 1833
- Genus Cancellopollia Vermeij & Bouchet, 1998 (3)
- Genus Cantharulus Meek, 1876 † (4)
- Genus Cantharus Röding, 1798 (26)
- Genus Dianthiphos Watters, 2009 (6)
- Genus Ecmanis Gistel, 1848 (1)
- Genus Editharus Vermeij, 2001 † (10)
- Genus Endopachychilus Cossmann, 1889 † (6)
- Genus Engina J. E. Gray, 1839 (68)
- Genus Enginella Monterosato, 1917 (3)
- Genus Eocantharus B. L. Clark, 1938 † (10)
- Genus Eopreangeria Banerjee & Halder, 2024 † (1)
- Genus Gemophos Olsson & Harbison, 1953 (11)
- Genus Gorgina Preston, 1909 accepted as Engina J. E. Gray, 1839
- Genus Hesperisternia J. A. Gardner, 1944 (13)
- Genus Ickarus Vermeij, 2001 † (1)
- Genus Janiopsis Rovereto, 1899 † (13)
- Genus Jeannea Iredale, 1912 accepted as Pisania (Jeannea) Iredale, 1912
- Genus Lagena Röding, 1798 accepted as Pollia J. E. Gray, 1834
- Genus Micrologus Fraussen & Rosado, 2011 (1)
- Genus Monostiolum Dall, 1904 (12)
- Genus Muricantharus Olsson, 1971 accepted as Hesperisternia J. A. Gardner, 1944
- Genus Pisania Bivona e Bernardi, 1832 (26)
- Subgenus Pisania (Celatoconus) Conrad, 1862
- Subgenus Pisania (Daphnobela) Cossmann, 1896 † accepted as Daphnobela Cossmann, 1896 †
- Subgenus Pisania (Jeannea) Iredale, 1912 represented as Pisania Bivona e Bernardi, 1832
- Subgenus Pisania (Tritonidea) Swainson, 1840 accepted as Pollia J. E. Gray, 1834
- Species Pisania aequilirata P. P. Carpenter, 1857 accepted as Pusio elegans (J. E. Gray, 1833)
- Species Pisania amphodon E. von Martens, 1880
- Species Pisania angusta E. A. Smith, 1899
- Species Pisania auritula (Link, 1807) accepted as Gemophos auritulus (Link, 1807)
- Species Pisania baetica Lozano-Francisco & Vera-Peláez, 2006 †
- Species Pisania bednalli G. B. Sowerby III, 1895 accepted as Pollia bednalli (G. B. Sowerby III, 1895)
- Species Pisania bernardoi Costa & R. S. Gomes, 1998 accepted as Dianthiphos bernardoi (Costa & R. S. Gomes, 1998)
- Species Pisania bicolor (Cantraine, 1835) accepted as Engina leucozona (R. A. Philippi, 1844)
- Species Pisania bilirata (Reeve, 1846)
- Species Pisania billeheusti (Petit de la Saussaye, 1853) accepted as Prodotia iostoma (J. E. Gray, 1833)
- Species Pisania brevis Tate, 1888 † accepted as Cantharus brevis (Tate, 1888) †
- Species Pisania cingulata (Reeve, 1846) accepted as Japeuthria cingulata (Reeve, 1846)
- Species Pisania cingulatum [sic] accepted as Japeuthria cingulata (Reeve, 1846)
- Species Pisania claibornensis Whitfield, 1865 †
- Species Pisania costata Thiele, 1925
- Species Pisania crenilabrum A. Adams, 1855 accepted as Pisania fasciculata (Reeve, 1846)
- Species Pisania crocata (Reeve, 1846) accepted as Prodotia crocata (Reeve, 1846)
- Species Pisania decollata (G. B. Sowerby I, 1833)
- Species Pisania delicatula G. B. Sowerby III, 1901
- Species Pisania dorbignyi (Payraudeau, 1826) accepted as Pollia dorbignyi (Payraudeau, 1826)
- Species Pisania elata P. P. Carpenter, 1864
- Species Pisania englerti Hertlein, 1960 accepted as Caducifer englerti (Hertlein, 1960)
- Species Pisania fasciculata (Reeve, 1846)
- Species Pisania ferrea (Reeve, 1847) accepted as Japeuthria ferrea (Reeve, 1847)
- Species Pisania filaris A. Adams, 1855
- Species Pisania flavescens F. W. Hutton, 1884 accepted as Buccinulum vittatum vittatum (Quoy & Gaimard, 1833)
- Species Pisania fortis P. P. Carpenter, 1866 accepted as Pusio fortis (P. P. Carpenter, 1866) †
- Species Pisania gaskelli Melvill, 1891 accepted as Orania gaskelli (Melvill, 1891)
- Species Pisania gracilis (G. B. Sowerby II, 1859)
- Species Pisania gracilis (Reeve, 1846) accepted as Prodotia lannumi (Schwengel, 1950)
- Species Pisania hedleyi (Iredale, 1912)
- Species Pisania hermannseni A. Adams, 1855
- Species Pisania hermonvillensis Cossmann, 1913 †
- Species Pisania ignea (Gmelin, 1791) accepted as Ecmanis ignea (Gmelin, 1791)
- Species Pisania janeirensis (R. A. Philippi, 1849) accepted as Pisania pusio (Linnaeus, 1758)
- Species Pisania jenningsi (Cernohorsky, 1966)
- Species Pisania karinae (Nowell-Usticke, 1959) accepted as Hesperisternia karinae (Nowell-Usticke, 1959)
- Species Pisania klaudiae Z. Kovács & Vicián, 2023 † accepted as Dianthiphos klaudiae (Z. Kovács & Vicián, 2023) †
- Species Pisania laevigata Bivona e Bernardi, 1832 accepted as Mitrella scripta (Linnaeus, 1758)
- Species Pisania lirocincta G. B. Sowerby III, 1910
- Species Pisania luctuosa Tapparone Canefri, 1877
- Species Pisania maculosa (Lamarck, 1822) accepted as Pisania striata (Gmelin, 1791)
- Variety Pisania maculosa var. elongata Pallary, 1900 accepted as Pisania striata (Gmelin, 1791)
- Variety Pisania maculosa var. fasciata Pallary, 1900 accepted as Pisania striata (Gmelin, 1791)
- Variety Pisania maculosa var. magna Foresti, 1868 † accepted as Pisania magna Foresti, 1868 †
- Variety Pisania maculosa var. obesa Pallary, 1900 accepted as Pisania striata (Gmelin, 1791)
- Variety Pisania maculosa var. plioangustata Sacco, 1890 † accepted as Pisania plioangustata Sacco, 1890 †
- Variety Pisania maculosa var. pliobrevis Sacco, 1890 † accepted as Pisania striata (Gmelin, 1791)
- Variety Pisania maculosa var. pliostriatissima Sacco, 1890 † accepted as Pisania magna Foresti, 1868 †
- Variety Pisania maculosa var. subangulata Foresti, 1868 † accepted as Pisania magna Foresti, 1868 †
- Variety Pisania maculosa var. trigonostoma Pallary, 1912 accepted as Pisania striata (Gmelin, 1791)
- Species Pisania magna Foresti, 1868 †
- Species Pisania mariavictoriae Brunetti & Della Bella, 2016 †
- Species Pisania media F. W. Hutton, 1885 † accepted as Buccinulum medium (F. W. Hutton, 1885) †
- Species Pisania mollis A. Gould, 1860 accepted as Pollia mollis (A. Gould, 1860)
- Species Pisania montrouzieri Crosse, 1862 accepted as Pisania fasciculata (Reeve, 1846)
- Species Pisania naevosa E. von Martens, 1880 accepted as Sinetectula naevosa (E. von Martens, 1880)
- Species Pisania nodulosa Bivona e Bernardi, 1832 accepted as Aplus nodulosus (Bivona e Bernardi, 1832)
- Species Pisania obliquecostata Tate, 1888 † accepted as Cantharus obliquecostatus (Tate, 1888) †
- Species Pisania orbignyi [sic] accepted as Aplus dorbignyi (Payraudeau, 1826)
- Species Pisania picta (Scacchi, 1836) accepted as Aplus scacchianus (R. A. Philippi, 1844)
- Species Pisania plicatula (Deshayes, 1835) †
- Species Pisania plioalboranensis Lozano-Francisco & Vera-Peláez, 2006 †
- Species Pisania plioangustata Sacco, 1890 †
- Species Pisania pusio (Linnaeus, 1758)
- Species Pisania redoniensis Landau, Ceulemans & Van Dingenen, 2019 †
- Species Pisania reticulata A. Adams, 1855 accepted as Cumia mestayerae (Iredale, 1915)
- Species Pisania rosadoi Bozzetti & Ferrario, 2005
- Species Pisania rostrata Tate, 1888 † accepted as Maculotriton rostratus (Tate, 1888) †
- Species Pisania rubiginosa Reeve, 1846 accepted as Pollia rubiginosa (Reeve, 1846)
- Species Pisania scholvieni Rolle, 1892
- Species Pisania schoutanica May, 1911 accepted as Fusus schoutanicus (May, 1911)
- Species Pisania semicostata Tate, 1888 † accepted as Buccinulum semicostatum (Tate, 1888) †
- Species Pisania solomonensis E. A. Smith, 1876
- Species Pisania striata (Gmelin, 1791)
- Species Pisania striatula Bivona e Bernardi, 1832 accepted as Pisania striata (Gmelin, 1791)
- Species Pisania strigata Pease, 1863
- Species Pisania subdiscolor H. Woodward, 1879 †
- Species Pisania sugimotoi (T. Habe, 1968)
- Species Pisania tasmanica Tenison Woods, 1876
- Species Pisania tenuicostata Tenison Woods, 1879 † accepted as Cumia tenuicostata (Tenison Woods, 1879) †
- Species Pisania tincta (Conrad, 1846) accepted as Gemophos tinctus (Conrad, 1846)
- Species Pisania tinctus (Conrad, 1846) accepted as Gemophos tinctus (Conrad, 1846)
- Species Pisania townsendi Melvill, 1918 accepted as Prodotia townsendi (Melvill, 1918)
- Species Pisania transsylvanica (R. Hoernes & Auinger, 1884) † accepted as Hilda transsylvanica (R. Hoernes & Auinger, 1884) †
- Species Pisania tritonoides (Reeve, 1846)
- Species Pisania truncatus (Hinds, 1844) accepted as Caducifer truncatus (Hinds, 1844)
- Species Pisania unicolor (Angas, 1867)
- Species Pisania variegata (J. E. Gray, 1839) accepted as Gemophos viverratus (Kiener, 1834)
- Genus Pollia J. E. Gray, 1834 (28)
- Genus Proboscidea Möller, 1832 accepted as Ecmanis Gistel, 1848
- Genus Pusio J. E. Gray, 1833 (3)
- Genus Pusiostoma Swainson, 1840 accepted as Engina J. E. Gray, 1839
- Genus Samudra Beets, 1987 † (1)
- Genus Sinetectula Fraussen & Vermeij, 2021 (6)
- Genus Solenosteira Dall, 1890 (9)
- Genus Steye Faber, 2004 (4)
- Genus Sukunaia Cernohorsky, 1966 accepted as Pisania Bivona e Bernardi, 1832
- Genus Tritonidea Swainson, 1840 accepted as Pollia J. E. Gray, 1834
- Genus Tritonidia [sic] accepted as Pollia J. E. Gray, 1834
- Genus Triumphis J. E. Gray, 1857 (3)
- Genus Zeapollia H. J. Finlay, 1926 † accepted as Cantharus Röding, 1798
- Family Prodotiidae Kantor, Fedosov, Kosyan, Puillandre, Sorokin, Kano, R. Clark & Bouchet, 2021 (27)
- Family Prosiphonidae A. W. B. Powell, 1951 (165)
- Family Pusiostomatidae Iredale, 1940 accepted as Pisaniidae J. E. Gray, 1857
- Family Pyrenidae Suter, 1909 accepted as Atiliinae Cossmann, 1901
- Family Retimohniidae Kantor, Fedosov, Kosyan, Puillandre, Sorokin, Kano, R. Clark & Bouchet, 2021 (31)
- Family Tudiclidae Cossmann, 1901 (195)
- Family Volemidae Winckworth, 1945 accepted as Melongenidae Gill, 1871 (1854)
- Superfamily Cancellarioidea Forbes & Hanley, 1851 accepted as Volutoidea Rafinesque, 1815
- Superfamily Conoidea J. Fleming, 1822 (8 694)
- Superfamily Mitroidea Swainson, 1831 (633)
- Superfamily Muricacea accepted as Muricoidea Rafinesque, 1815
- Superfamily Muricoidea Rafinesque, 1815 (2 940)
- Superfamily Neogastropoda incertae sedis (296)
- Superfamily Olivoidea Latreille, 1825 (740)
- Superfamily Pholidotomoidea Cossmann, 1896 † (56)
- Superfamily Pseudolivoidea De Gregorio, 1880 accepted as Olivoidea Latreille, 1825
- Superfamily Pyrifusoidea Bandel & Dockery, 2001 † accepted as Pholidotomoidea Cossmann, 1896 †
- Superfamily Sarganoidea Stephenson, 1923 † accepted as Pholidotomoidea Cossmann, 1896 †
- Superfamily Toxoglossa Troschel, 1848 accepted as Conoidea J. Fleming, 1822
- Superfamily Turbinelloidea Swainson, 1835 (1 253)
- Superfamily Volutoidea Rafinesque, 1815 (3 873)
- Order Stenoglossa accepted as Neogastropoda
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 172)
- 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