Between brackets is the number of accepted species

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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)
- 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)
- Family Cancellariidae Forbes & Hanley, 1851 (855)
- Subfamily Admetinae Troschel, 1865 (129)
- Genus Admete Møller, 1842 (29)
- Subgenus Admete (Bonellitia) Jousseaume, 1887 accepted as Bonellitia Jousseaume, 1887
- Subgenus Admete (Coptostoma) Cossmann, 1899 † accepted as Coptostoma Cossmann, 1899 †
- Subgenus Admete (Microcancilla) Dall, 1924 accepted as Microcancilla Dall, 1924
- Species Admete abnormis Harmer, 1918 accepted as Admete viridula (O. Fabricius, 1780)
- Species Admete aethiopica Thiele, 1925 accepted as Cancellicula aethiopica (Thiele, 1925)
- Species Admete ambigua F. W. Hutton, 1885 † accepted as Leucotina casta (A. Adams, 1853)
- Species Admete anomala P. Marshall & Murdoch, 1920 † accepted as Brocchinia anomala (P. Marshall & Murdoch, 1920) †
- Species Admete antarctica (Strebel, 1908) accepted as Nothoadmete antarctica (Strebel, 1908)
- Species Admete arctica (Middendorff, 1849) accepted as Neoiphinoe arctica (Middendorff, 1849)
- Species Admete azorica Bouchet & Warén, 1985 accepted as Brocchinia azorica (Bouchet & Warén, 1985)
- Species Admete borealis A. Adams, 1855 accepted as Admete viridula (O. Fabricius, 1780)
- Species Admete bruuni Knudsen, 1964
- Species Admete californica (Dall, 1908)
- Species Admete cancellata Kobelt, 1887 accepted as Neadmete cancellata (Kobelt, 1887)
- Species Admete carinata (R. B. Watson, 1882) accepted as Zeadmete watsoni Petit, 1970
- Species Admete choshiensis Shikama, 1962
- Species Admete circumcincta (Dall, 1873) accepted as Neadmete circumcincta (Dall, 1873)
- Species Admete clivicola Høisæter, 2011
- Species Admete consobrina A. W. B. Powell, 1951 accepted as Nothoadmete consobrina (A. W. B. Powell, 1951)
- Species Admete contabulata Friele, 1879
- Species Admete cornidei Altimira, 1978 accepted as Admetula cornidei (Altimira, 1978)
- Species Admete costellifera (J. de C. Sowerby, 1832) accepted as Admete viridula (O. Fabricius, 1780)
- Species Admete couthouyi (J. C. Jay, 1839) accepted as Admete viridula (O. Fabricius, 1780)
- Species Admete crispa Møller, 1842 accepted as Admete viridula (O. Fabricius, 1780)
- Species Admete cristata Marwick, 1926 † accepted as Waipaoa cristata (Marwick, 1926) †
- Species Admete decapensis Barnard, 1960 accepted as Brocchinia decapensis (Barnard, 1960)
- Species Admete delicatula E. A. Smith, 1907 accepted as Nothoadmete delicatula (E. A. Smith, 1907)
- Species Admete enderbyensis A. W. B. Powell, 1958
- Species Admete etolonensis Sinelnikova, 1990 †
- Species Admete finlayi (A. W. B. Powell, 1940) accepted as Zeadmete finlayi A. W. B. Powell, 1940
- Species Admete frigida Rochebrune & Mabille, 1885
- Species Admete girauxi Cossmann, 1913 † accepted as Admetula girauxi (Cossmann, 1913) †
- Species Admete globularis E. A. Smith, 1875 accepted as Microglyphis globularis (E. A. Smith, 1875)
- Species Admete gracilior (P. P. Carpenter, 1869)
- Species Admete grandis Mörch, 1869 accepted as Admete viridula (O. Fabricius, 1780)
- Species Admete haini Numanami, 1996
- Species Admete harpovoluta A. W. B. Powell, 1957 accepted as Nothoadmete harpovoluta (A. W. B. Powell, 1957)
- Species Admete hukuiensis Nomura & Niino, 1940 accepted as Nipponaphera semipellucida (A. Adams & Reeve, 1850)
- Species Admete kamtschatica Sinelnikova, 1990 †
- Species Admete katsuhiraensis Amano, Oleinik & R. G. Jenkins, 2016 †
- Species Admete limnaeaeformis E. A. Smith, 1877 accepted as Toledonia limnaeaeformis (E. A. Smith, 1877)
- Species Admete magellanica (Strebel, 1905)
- Species Admete maorium P. Marshall & Murdoch, 1921 † accepted as Scalptia maoria (P. Marshall & Murdoch, 1921) †
- Species Admete microscopica (Dall, 1889) accepted as Microcancilla microscopica (Dall, 1889)
- Species Admete microsoma (Dall, 1908)
- Species Admete middendorffiana Dall, 1885 accepted as Admete viridula (O. Fabricius, 1780)
- Species Admete modesta (P. P. Carpenter, 1864) accepted as Neadmete modesta (P. P. Carpenter, 1864)
- Species Admete neymanae Sirenko, 2015
- Species Admete nodosa A. E. Verrill & S. Smith, 1885 accepted as Brocchinia nodosa (A. E. Verrill & S. Smith, 1885)
- Species Admete ornata (Ovechkin, 1954) †
- Species Admete ovata E. A. Smith, 1875
- Species Admete philippii Ihering, 1907
- Species Admete philippii Carcelles, 1950 accepted as Admete philippii Ihering, 1907
- Species Admete regina Dall, 1911 accepted as Admete solida (Aurivillius, 1885)
- Species Admete rhyssa Dall, 1919 accepted as Admete gracilior (P. P. Carpenter, 1869)
- Species Admete sadko Gorbunov, 1946
- Species Admete schythei (R. A. Philippi, 1855)
- Species Admete seftoni S. S. Berry, 1956 accepted as Admete gracilior (P. P. Carpenter, 1869)
- Species Admete solida (Aurivillius, 1885)
- Species Admete specularis (R. B. Watson, 1882)
- Species Admete stricta Hedley, 1907 accepted as Pepta stricta (Hedley, 1907)
- Species Admete submitroides Cossmann & Pissarro, 1905 † accepted as Unitas submitroides (Cossmann & Pissarro, 1905) †
- Species Admete suteri P. Marshall & Murdoch, 1920 † accepted as Oamaruia suteri (P. Marshall & Murdoch, 1920) †
- Species Admete tabulata G. B. Sowerby III, 1875
- Species Admete tenuissima Okutani & Fujikura, 2002
- Species Admete trigostomoides Bouchard, Wesselingh, Pouwer & Landau, 2025 †
- Species Admete umbilicata Hickman, 1980 †
- Species Admete unalashkensis (Dall, 1873) accepted as Neadmete unalashkensis (Dall, 1873)
- Species Admete undatocostata Verkrüzen, 1875 accepted as Admete viridula (O. Fabricius, 1780)
- Species Admete verenae Harasewych & Petit, 2011
- Species Admete viridula (O. Fabricius, 1780)
- Variety Admete viridula var. distincta Leche, 1878 accepted as Admete viridula (O. Fabricius, 1780)
- Variety Admete viridula var. elongata Leche, 1878 accepted as Admete viridula (O. Fabricius, 1780)
- Variety Admete viridula var. grandis Mörch, 1869 accepted as Admete grandis Mörch, 1869
- Variety Admete viridula var. laevior Leche, 1878 accepted as Admete viridula (O. Fabricius, 1780)
- Variety Admete viridula var. producta G. O. Sars, 1878 accepted as Admete viridula (O. Fabricius, 1780)
- Variety Admete viridula var. undata Leche, 1878 accepted as Admete viridula (O. Fabricius, 1780)
- Variety Admete viridula var. ventricosa Friele, 1879 accepted as Admete viridula (O. Fabricius, 1780)
- Species Admete watanabei Shikama, 1962
- Species Admete woodworthi Dall, 1905 accepted as Admete gracilior (P. P. Carpenter, 1869)
- Species Admete yokoyamai Oyama, 1954 †
- Genus Antepepta H. J. Finlay & Marwick, 1937 † (1)
- Genus Brocchinia Jousseaume, 1887 (33)
- Genus Cancellicula Tabanelli, 2008 (3)
- Genus Microcancilla Dall, 1924 (4)
- Genus Neadmete Habe, 1961 (10)
- Genus Nothoadmete P. G. Oliver, 1982 (6)
- Genus Paladmete J. A. Gardner, 1916 † (1)
- Genus Pseudobabylonella Brunetti, Della Bella, Forli & Vecchi, 2009 (6)
- Genus Sveltella Cossmann, 1889 † (10)
- Genus Zeadmete H. J. Finlay, 1926 (26)
- Subfamily Cancellariinae Forbes & Hanley, 1851 (284)
- Subfamily Plesiotritoninae Beu & P. A. Maxwell, 1987 (87)
- Subfamily Trigonostomatinae Cossmann, 1899 accepted as Cancellariinae Forbes & Hanley, 1851
- Genus Admetula Cossmann, 1889 (34)
- Genus Anapepta H. J. Finlay, 1930 accepted as Brocchinia Jousseaume, 1887
- Genus Aneurystoma Cossmann, 1899 † (3)
- Genus Arizelostoma Iredale, 1936 accepted as Trigonostoma Blainville, 1827
- Genus Axelella Petit, 1988 (13)
- Genus Babylonella Conrad, 1865 † (2)
- Genus Bivetia Jousseaume, 1887 accepted as Cancellaria Lamarck, 1799
- Genus Bivetiella Wenz, 1943 (9)
- Genus Bivetopsia Jousseaume, 1887 (4)
- Genus Calcarata Jousseaume, 1887 † (5)
- Genus Cancellaphera Iredale, 1930 (3)
- Genus Charcolleria Olsson, 1942 † accepted as Massyla H. Adams & A. Adams, 1854
- Genus Coptostomella H. J. Finlay & Marwick, 1937 † (2)
- Genus Crawfordia Dall, 1918 accepted as Crawfordina Dall, 1919
- Genus Crawfordina Dall, 1919
- Genus Egerea Gábor, 1936 † (1)
- Genus Euclia H. Adams & A. Adams, 1854 (8)
- Genus Extractrix Korobkov, 1955 accepted as Trigonostoma Blainville, 1827
- Genus Fusiaphera Habe, 1961 (9)
- Genus Gerdiella Olsson & Bayer, 1973 (4)
- Genus Gergovia Cossmann, 1899 † (2)
- Genus Gulia Jousseaume, 1887 (4)
- Genus Habesolatia Kuroda, 1965 accepted as Cancellaria (Habesolatia) Kuroda, 1965
- Genus Hertleinia J. G. Marks, 1949 (2)
- Genus Inglisella H. J. Finlay, 1924 (19)
- Genus Iphinoella Habe, 1958 accepted as Iphinopsis Dall, 1924
- Genus Iphinopsis Dall, 1924 (11)
- Genus Maorivetia Finlay, 1924 † (1)
- Genus Massyla H. Adams & A. Adams, 1854 (11)
- Genus Mericella Thiele, 1929 (6)
- Genus Microsveltia Iredale, 1925 (20)
- Genus Mirandaphera Bouchet & Petit, 2002 (4)
- Genus Momoebora Kuroda & Habe, 1971 accepted as Merica H. Adams & A. Adams, 1854
- Genus Narona H. Adams & A. Adams, 1854 (4)
- Genus Nevia Jousseaume, 1887 (1)
- Genus Nipponaphera Habe, 1961 (16)
- Genus Oamaruia H. J. Finlay, 1924 (6)
- Genus Olssonella Petit, 1970 accepted as Axelella Petit, 1988
- Genus Ovilia Jousseaume, 1887 † (10)
- Genus Palaeadmete Cossmann, 1920 accepted as Paladmete J. A. Gardner, 1916 †
- Genus Palaeocancellaria Kollmann, 1976 † (1)
- Genus Pallidonia Laseron, 1955 accepted as Pepta Iredale, 1925
- Genus Panarona Petit, 1975 accepted as Narona H. Adams & A. Adams, 1854
- Genus Pepta Iredale, 1925 (3)
- Genus Perplicaria Dall, 1890 (5)
- Genus Petitina Harzhauser & Landau, 2012 † (2)
- Genus Pezantia Cossmann, 1896 † (2)
- Genus Plesiocerithium Cossmann, 1889 † (2)
- Genus Pristimerica H. J. Finlay & Marwick, 1937 † (2)
- Genus Progabbia Dall, 1918 accepted as Cancellaria Lamarck, 1799
- Genus Pyruclia Olsson, 1932 (11)
- Genus Rhomboidestoma K. Martin, 1931 (1)
- Genus Scalptia Jousseaume, 1887 (57)
- Genus Solatia Jousseaume, 1887 (5)
- Genus Solutosveltia Habe, 1961 accepted as Brocchinia Jousseaume, 1887
- Genus Steiningeriella Harzhauser & Landau, 2012 † (1)
- Genus Sydaphera Iredale, 1929 (15)
- Genus Tatara C. A. Fleming, 1950 † (5)
- Genus Trigona G. Perry, 1811 accepted as Trigonostoma Blainville, 1827
- Genus Trigonaphera Iredale, 1936 (7)
- Genus Trigonophera [Habe & Okutani, 1985] accepted as Trigonaphera Iredale, 1936
- Genus Uxia Jousseaume, 1887 † accepted as Unitas K. van W. Palmer, 1947 †
- Genus Ventrilia Jousseaume, 1887 (19)
- Genus Vercomaris Garrard, 1975 accepted as Zeadmete H. J. Finlay, 1926
- Genus Waipaoa Marwick, 1931 † (3)
- Family Cystiscidae W. Stimpson, 1865 (552)
- Family Granulinidae G. A. Coovert & H. K. Coovert, 1995 (152)
- Family Marginellidae J. Fleming, 1828 (1 444)
- Family Marginellonidae Coan, 1965 (4)
- Family Paladmetidae Stephenson, 1941 † accepted as Admetinae Troschel, 1865
- Family Plesiocystiscidae G. A. Coovert & H. K. Coovert, 1995 accepted as Plesiocystiscinae G. A. Coovert & H. K. Coovert, 1995
- Family Volutidae Rafinesque, 1815 (866)
- 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