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- 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)
- Order Neogastropoda (23 716)
- 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)
- Subfamily Atiliinae Cossmann, 1901
- Subfamily Columbellinae Swainson, 1840
- Genus Ademitrella Ludbrook, 1941 † (1)
- Genus Aesopus A. Gould, 1860 (32)
- Genus Alcira H. Adams, 1861 (1)
- Genus Alia H. Adams & A. Adams, 1853 (6)
- Genus Amphissa H. Adams & A. Adams, 1853 (10)
- Genus Anachis H. Adams & A. Adams, 1853 (127)
- Genus Anachys [sic] accepted as Anachis H. Adams & A. Adams, 1853
- Genus Antimitrella A. W. B. Powell, 1937 (14)
- Genus Antizafra H. J. Finlay, 1926 † (9)
- Genus Aoteatilia A. W. B. Powell, 1939 (10)
- Genus Ascalista Drivas & M. Jay, 1990 (4)
- Genus Astyris H. Adams & A. Adams, 1853 (38)
- Genus Atilia H. Adams & A. Adams, 1853 accepted as Anachis H. Adams & A. Adams, 1853
- Genus Attilia H. Adams & A. Adams, 1853 accepted as Atilia H. Adams & A. Adams, 1853
- Genus Auingeria Harzhauser & Landau, 2021 † (3)
- Genus Bastropia K. van W. Palmer, 1937 † accepted as Mitrella (Bastropia) K. van W. Palmer, 1937 †
- Genus Bathyglypta Pelorce, 2017 (3)
- Genus Bellacolumbella Harzhauser & Landau, 2021 † (4)
- Genus Bifurcium P. Fischer, 1884 (1)
- Genus Brachystyloma Weisbord, 1962 † accepted as Anachis H. Adams & A. Adams, 1853
- Genus Cigclirina Woodring, 1928 † (1)
- Genus Cilara Thiele, 1924 (1)
- Genus Clathranachis Kuroda & Habe, 1954 (2)
- Genus Clavistrombina P. Jung, 1989 (1)
- Genus Clinurella Sacco, 1890 † (4)
- Genus Colombella [sic] accepted as Columbella Lamarck, 1799
- Genus Colombellarius Duméril, 1805 accepted as Columbella Lamarck, 1799
- Genus Columbela [sic] accepted as Columbella Lamarck, 1799
- Genus Columbella Lamarck, 1799 (39)
- Genus Columbellidae incertae sedis (1)
- Genus Columbellisipho Cossmann, 1889 † (2)
- Genus Columbellopsis Bucquoy, Dautzenberg & Dollfus, 1882 accepted as Mitrella Risso, 1826
- Genus Columbus Montfort, 1810 accepted as Columbella Lamarck, 1799
- Genus Columella [sic] accepted as Columbella Lamarck, 1799
- Genus Conella Swainson, 1840 (2)
- Genus Conidea Swainson, 1840 accepted as Pyrene Röding, 1798
- Genus Cosmioconcha Dall, 1913 (19)
- Genus Costoanachis Sacco, 1890 (52)
- Genus Cotonopsis Olsson, 1942 (21)
- Genus Decipifus Olsson & McGinty, 1958 (12)
- Genus Defensina Harzhauser & Landau, 2021 † (1)
- Genus Dentimitrella Ludbrook, 1958 accepted as Mitrella (Dentimitrella) Ludbrook, 1958
- Genus Euplica Dall, 1889 (16)
- Genus Eurypyrene Woodring, 1928 (3)
- Genus Euryta H. Adams & A. Adams, 1853 accepted as Mazatlania Dall, 1900
- Genus Euspiralta K. Monsecour & Pelorce, 2013 (2)
- Genus Exaesopus deMaintenon, 2019 (2)
- Genus Exomilopsis A. W. B. Powell, 1964 (2)
- Genus Falsuszafrona Pelorce, 2020 (12)
- Genus Gatliffena Iredale, 1929 (1)
- Genus Glyptanachis Pilsbry & H. N. Lowe, 1932 (1)
- Genus Graphicomassa Iredale, 1929 (6)
- Genus Indomitrella Oostingh, 1940 (14)
- Genus Ithiaesopus Olsson & Harbison, 1953 (2)
- Genus Juliamitrella L. D. Campbell, 1993 † (3)
- Genus Lavesopus Iredale, 1929 accepted as Aesopus (Lavesopus) Iredale, 1929
- Genus Liratilia H. J. Finlay, 1926 (6)
- Genus Macrozafra H. J. Finlay, 1926 (8)
- Genus Maintenonia K. Monsecour & D. Monsecour, 2024 (1)
- Genus Martaia Harzhauser & Landau, 2021 † (2)
- Genus Mazatlania Dall, 1900 (5)
- Genus Meta Reeve, 1859 accepted as Parametaria Dall, 1916
- Genus Metanachis Thiele, 1924 (4)
- Genus Metulella Gabb, 1873 (2)
- Genus Microcithara P. Fischer, 1884 (4)
- Genus Minimanachis Pelorce, 2020 (4)
- Genus Mitrella Risso, 1826 (293)
- Genus Mitropsis Pease, 1868 (2)
- Genus Mokumea T. Habe, 1991 (10)
- Genus Nassarina Dall, 1889 (21)
- Genus Nitidella Swainson, 1840 (1)
- Genus Nodochila Rehder, 1980 (1)
- Genus Orthurella Sacco, 1890 † (6)
- Genus Parametaria Dall, 1916 (6)
- Genus Pardalina Jousseaume, 1888 accepted as Pardalinops deMaintenon, 2008
- Genus Pardalinops deMaintenon, 2008 (6)
- Genus Pardanilops accepted as Pardalinops deMaintenon, 2008
- Genus Parvanachis Radwin, 1968 (14)
- Genus Paxula H. J. Finlay, 1926 (5)
- Genus Pictocolumbella Habe, 1945 (1)
- Genus Pleurifera Drivas & M. Jay, 1997 accepted as Pleuriferapex K. Monsecour & D. Monsecour, 2023
- Genus Pleuriferapex K. Monsecour & D. Monsecour, 2023 (6)
- Genus Pleurotomitrella Habe, 1958 accepted as Pyreneola Iredale, 1918
- Genus Psarostola Rehder, 1943 accepted as Steironepion Pilsbry & H. N. Lowe, 1932
- Genus Pseudamycla Pace, 1902 (3)
- Genus Pseudozafrona Arias Ávila, 2016 accepted as Urpiella Arias Ávila, 2021
- Genus Pygmaea Mörch, 1859
- Genus Pyrene Röding, 1798 (9)
- Genus Pyreneola Iredale, 1918 (16)
- Genus Radwinia Shasky, 1970 (1)
- Genus Ramoliva Cotton & Godfrey, 1932 (1)
- Genus Redfernella Espinosa & Ortea, 2020 (5)
- Genus Retizafra Hedley, 1913 (30)
- Genus Rhombinella Radwin, 1968 (1)
- Genus Ruthia Shasky, 1970 (2)
- Genus Salitra Marincovich, 1973 (1)
- Genus Scabrella Sacco, 1890 † (4)
- Genus Seminella Pease, 1868 (9)
- Genus Sincola Olsson & Harbison, 1953 (7)
- Genus Smithena F. Boyer, Pelorce & Gori, 2022 (7)
- Genus Speirazafra K. Monsecour & Raines, 2024 (1)
- Genus Steironepion Pilsbry & H. N. Lowe, 1932 (9)
- Genus Streptorygma Weisbord, 1962 †
- Genus Strombina Mörch, 1852 (22)
- Genus Strombinella Dall, 1896 † (1)
- Genus Strombocolumbus Cossmann, 1901 accepted as Strombina Mörch, 1852
- Genus Sulcomitrella Kuroda, T. Habe & Oyama, 1971 (16)
- Genus Suturoglypta Radwin, 1968 (24)
- Genus Thiarella Sacco, 1890 † (2)
- Genus Thiarinella Sacco, 1890 accepted as Scabrella Sacco, 1890 †
- Genus Trahaldia Pacaud, 2017 † (1)
- Genus Turricolumbus Cossmann, 1901 † (1)
- Genus Turrijaumelia Sarasúa, 1975 (4)
- Genus Urpiella Arias Ávila, 2021 (1)
- Genus Zafra A. Adams, 1860 (68)
- Subgenus Zafra (Mokumea) T. Habe, 1991 accepted as Mokumea T. Habe, 1991
- Subgenus Zafra (Retizafra) Hedley, 1913 accepted as Retizafra Hedley, 1913
- Species Zafra aequatorialis (Thiele, 1925)
- Species Zafra albomarginata Okamoto & T. Habe, 1979 accepted as Mokumea albomarginata (Okamoto & T. Habe, 1979)
- Species Zafra almiranta Hedley, 1915 accepted as Zafra darwini (Angas, 1877)
- Species Zafra alternata (A. Gould, 1860)
- Species Zafra altispira Bozzetti, 2008 accepted as Smithena altispira (Bozzetti, 2008)
- Species Zafra ambonensis deMaintenon, 2008
- Species Zafra atrata (A. Gould, 1860)
- Species Zafra australensis K. Monsecour & D. Monsecour, 2015
- Species Zafra avicennia Hedley, 1915 accepted as Zafra pumila (Dunker, 1860)
- Species Zafra babylonica (Hedley, 1907)
- Species Zafra bilineata deMaintenon, 2008
- Species Zafra brevissima (Hervier, 1900)
- Species Zafra brunneastriata K. Monsecour & D. Monsecour, 2018
- Species Zafra cinnamomea (Hervier, 1900)
- Species Zafra columnaria May, 1915
- Species Zafra comistea (Melvill, 1906) accepted as Seminella comistea (Melvill, 1906)
- Species Zafra darwini (Angas, 1877)
- Species Zafra debilis Hedley, 1915
- Species Zafra decussata Cossmann, 1891 † accepted as Buchozia cossmanni (Glibert, 1962) †
- Species Zafra dejugis K. Monsecour & D. Monsecour, 2016
- Species Zafra digglesi (Brazier, 1875)
- Species Zafra exilis (R. A. Philippi, 1849)
- Species Zafra farasanensis Neubert, 1998
- Species Zafra fijiensis K. Monsecour & Raines, 2024
- Species Zafra fuscolineata W. R. B. Oliver, 1915
- Species Zafra fuscomaculata (Thiele, 1925)
- Species Zafra geyserensis Drivas & M. Jay, 1997
- Species Zafra gracilenta K. Monsecour & D. Monsecour, 2016
- Species Zafra hahajimana (Pilsbry, 1904)
- Species Zafra hedleyi (Thiele, 1930)
- Species Zafra hervieri (Pace, 1903)
- Species Zafra impedita Laws, 1940 †
- Species Zafra juttingae (Oostingh, 1940) †
- Species Zafra kaicherae Drivas & M. Jay, 1990
- Species Zafra kermadecensis W. R. B. Oliver, 1915
- Species Zafra marisrubris Neubert, 1998
- Species Zafra melitoma (Melvill & Standen, 1901)
- Species Zafra microstoma (Thiele, 1925)
- Species Zafra minuscula (A. Gould, 1860) accepted as Zafra pumila (Dunker, 1860)
- Species Zafra minuta (A. Gould, 1860)
- Species Zafra mitriformis A. Adams, 1860
- Species Zafra morini (Viader, 1938)
- Species Zafra niasensis (Thiele, 1925)
- Species Zafra nukuhiva K. Monsecour & D. Monsecour, 2018
- Species Zafra obesula (Hervier, 1900)
- Species Zafra ocellatula (Hervier, 1900)
- Species Zafra opihiensis Laws, 1933 †
- Species Zafra ornata (Pease, 1868)
- Species Zafra padangensis (Thiele, 1925)
- Species Zafra parilis K. Monsecour & D. Monsecour, 2016
- Species Zafra pascua Hertlein, 1962 accepted as Nodochila pascua (Hertlein, 1962)
- Species Zafra paulina (Thiele, 1925)
- Species Zafra paumotensis (Tryon, 1883) accepted as Mitropsis paumotensis (Tryon, 1883)
- Species Zafra peasei (E. von Martens & Langkavel, 1871) accepted as Seminella peasei (E. von Martens & Langkavel, 1871)
- Species Zafra pellucida Gori, F. Boyer & Pelorce, 2025
- Species Zafra phaula (Melvill & Standen, 1901)
- Species Zafra polita G. Nevill & H. Nevill, 1875 accepted as Ascalista polita (G. Nevill & H. Nevill, 1875)
- Species Zafra pumila (Dunker, 1860)
- Species Zafra pupoidea H. Adams, 1872 accepted as Iredalea pupoidea (H. Adams, 1872)
- Species Zafra purpurea H. Adams, 1873 accepted as Seminella peasei (E. von Martens & Langkavel, 1871)
- Species Zafra rapanuiensis Raines, 2002
- Species Zafra regulus (Souverbie, 1864)
- Species Zafra rufopiperata (E. A. Smith, 1884)
- Species Zafra salutaris (Melvill, 1910)
- Species Zafra savignyi (Moazzo, 1939)
- Species Zafra saviniae (Viader, 1951) accepted as Seminella saviniae (Viader, 1951)
- Species Zafra selasphora (Melvill & Standen, 1901)
- Species Zafra semiclatriata Sleurs, 1987
- Species Zafra seminulum (Thiele, 1925)
- Species Zafra semisculpta G. Nevill & H. Nevill, 1875
- Species Zafra sinensis (G. B. Sowerby III, 1894) accepted as Zafra troglodytes (Souverbie, 1866)
- Species Zafra smithi (Angas, 1877)
- Species Zafra spadicea K. Monsecour & Raines, 2024
- Species Zafra stricosa K. Monsecour & D. Monsecour, 2016
- Species Zafra subvitrea (E. A. Smith, 1879)
- Species Zafra succinea (Hervier, 1899)
- Species Zafra taylorae Raines, 2002
- Species Zafra thaanumi K. Monsecour & Raines, 2024
- Species Zafra townsendi (Melvill & Standen, 1901)
- Species Zafra troglodytes (Souverbie, 1866)
- Species Zafra ulinganensis Sleurs, 1987
- Species Zafra validicosta T. Habe, 1960 accepted as Zafra mitriformis A. Adams, 1860
- Species Zafra ventricosa Gori, F. Boyer & Pelorce, 2025
- Species Zafra vercoi (Thiele, 1930)
- Species Zafra vexillum Bozzetti, 2008
- Species Zafra virginea (A. Gould, 1860) accepted as Seminella virginea (A. Gould, 1860)
- Species Zafra yokoyamai Makiyama, 1927 †
- Genus Zafrona Iredale, 1916 (17)
- Genus Zanassarina Pilsbry & H. N. Lowe, 1932 (5)
- Genus Zella Iredale, 1924 (1)
- Genus Zemitrella H. J. Finlay, 1926 (38)
- Genus Zetekia Dall, 1918 (1)
- 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)
- 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 (8 674)
- 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 † (55)
- 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 (1 252)
- Superfamily Volutoidea Rafinesque, 1815 (3 873)
- 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