Between brackets is the number of accepted species

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- Mollusca (132 738)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (24 984)
- Class Caudofoveata (143)
- Class Cephalopoda (1 830)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 673)
- Subclass Amphigastropoda † (387)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 618)
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 153)
- 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)
- Order Anisobranchia accepted as Trochidae Rafinesque, 1815
- Order Cocculinida (69)
- Order Lepetellida (1 205)
- Order Neomphalida (63)
- Order Pleurotomariida (695)
- Order Seguenziida (923)
- Order Trochida (3 799)
- Superfamily Angarioidea Gray, 1857 accepted as Trochoidea Rafinesque, 1815
- Superfamily Phasianelloidea Swainson, 1840 accepted as Trochoidea Rafinesque, 1815
- Superfamily Trochoidea Rafinesque, 1815 (3 799)
- Family Angariidae J. E. Gray, 1857 (59)
- Family Anomphalidae Wenz, 1938 † (16)
- Family Araeonematidae Nützel, 2012 † (10)
- Family Areneidae J. H. McLean, 2012 (56)
- Family Ataphridae Cossmann, 1915 † (16)
- Family Calliostomatidae Thiele, 1924 (1847) (617)
- Family Colloniidae Cossmann, 1917 (362)
- Family Conradiidae A. N. Golikov & Starobogatov, 1987 (109)
- Family Crosseolidae Hickman, 2013 accepted as Conradiidae A. N. Golikov & Starobogatov, 1987
- Family Cyclostrematidae P. Fischer, 1885 accepted as Liotiidae Gray, 1850
- Family Delphinulidae Stoliczka, 1868 accepted as Angariidae J. E. Gray, 1857
- Family Elasmonematidae Knight, 1956 † (11)
- Family Epulotrochidae Gründel, Keupp & F. Lang, 2017 † (10)
- Family Eucochlidae Bandel, 2002 † (3)
- Family Fossarinidae Bandel, 2009 accepted as Fossarininae Bandel, 2009
- Family Gazidae Hickman & J. H. McLean, 1990 accepted as Margaritidae Thiele, 1924
- Family Liotiidae Gray, 1850 (154)
- Family Liotinidae Nomura, 1932 accepted as Liotiidae Gray, 1850
- Family Margaritidae Thiele, 1924 (76)
- Family Margaritinae Stoliczka, 1868 accepted as Margaritidae Thiele, 1924
- Family Metriomphalidae Gründel, Keupp & F. Lang, 2017 † (8)
- Family Microdomatidae Wenz, 1938 † (12)
- Family Nododelphinulidae L. R. Cox, 1960 † (17)
- Family Paleophasianellidae Chaix & Plicot, 2024 † (2)
- Family Phasianellidae Swainson, 1840 (84)
- Family Proconulidae L. R. Cox, 1960 † (10)
- Family Sclarotrardidae Gründel, Keupp & F. Lang, 2017 † (1)
- Family Skeneidae W. Clark, 1851 (440)
- Family Solariellidae A. W. B. Powell, 1951 (272)
- Family Stomatellidae J. E. Gray, 1840 accepted as Stomatellinae J. E. Gray, 1840
- Family Stomatiidae P. P. Carpenter, 1861 accepted as Stomatellinae J. E. Gray, 1840
- Family Talopiidae Finlay, 1928 accepted as Umboniinae H. Adams & A. Adams, 1854 (1840)
- Family Tegulidae Kuroda, Habe & Oyama, 1971 (120)
- Family Tricoliidae Woodring, 1928 accepted as Tricoliinae Woodring, 1928
- Family Trochidae Rafinesque, 1815 (1 043)
- Subfamily Alcyninae S. T. Williams, K. M. Donald, Spencer & T. Nakano, 2010 (8)
- Subfamily Cantharidinae J. E. Gray, 1857 (498)
- Subfamily Carinotrochinae S.-Q. Zhang, J.-L. Zhang & S.-P. Zhang, 2020 (2)
- Subfamily Cataeginae J. H. McLean & Quinn, 1987 accepted as Cataegidae J. H. McLean & Quinn, 1987
- Subfamily Chrysostomatinae S. T. Williams, K. M. Donald, Spencer & T. Nakano, 2010 (6)
- Subfamily Fossarininae Bandel, 2009 (22)
- Subfamily Gibbulinae Stoliczka, 1868 accepted as Cantharidinae J. E. Gray, 1857
- Subfamily Halistylinae Keen, 1958 (19)
- Subfamily Kaiparathininae B. A. Marshall, 1993 (9)
- Subfamily Lirulariinae Hickman & J. H. McLean, 1990 accepted as Umboniinae H. Adams & A. Adams, 1854 (1840)
- Subfamily Margaritinae Thiele, 1924 accepted as Margaritidae Thiele, 1924
- Subfamily Monodontinae J. E. Gray, 1857 (36)
- Subfamily Pyramidinae Gray, 1847 accepted as Tegulidae Kuroda, Habe & Oyama, 1971
- Subfamily Solariellinae A. W. B. Powell, 1951 accepted as Solariellidae A. W. B. Powell, 1951
- Subfamily Stomatellinae J. E. Gray, 1840 (48)
- Subfamily Trochaclidinae accepted as Trochaclididae Thiele, 1928
- Subfamily Trochidae incertae sedis (12)
- Subfamily Trochinae Rafinesque, 1815 (213)
- Genus Camelotrochus B. A. Marshall, 1998 accepted as Trochus (Camelotrochus) B. A. Marshall, 1998
- Genus Cantharidella Pilsbry, 1889 (1)
- Genus Carinidea Swainson, 1840 accepted as Infundibulum Montfort, 1810
- Genus Clanculopsis Monterosato, 1880 accepted as Clanculus (Clanculopsis) Monterosato, 1880
- Genus Clanculus Montfort, 1810 (115)
- Genus Coelotrochus P. Fischer, 1879 (14)
- Genus Cratidentium K. M. Donald & Spencer, 2016 (5)
- Genus Eucheliclanculus Kuroda & Habe, 1971 accepted as Clanculus (Eucheliclanculus) Kuroda & T. Habe, 1971
- Genus Euclanculus Cotton & Godfrey, 1934 accepted as Clanculus Montfort, 1810
- Genus Eurytrochus P. Fischer, 1879 (10)
- Genus Fragella Swainson, 1840 accepted as Clanculus Montfort, 1810
- Genus Infundibulops Pilsbry, 1889 accepted as Trochus (Infundibulops) Pilsbry, 1889
- Genus Infundibulum Montfort, 1810 (3)
- Genus Isoclanculus Cotton & Godfrey, 1934 accepted as Clanculus Montfort, 1810
- Genus Kolesnikoviella Sladkovskaya, 2017 † (1)
- Genus Lamprostoma Swainson, 1840 accepted as Trochus Linnaeus, 1758
- Genus Macroclanculus Cotton & Godfrey, 1934 accepted as Clanculus Montfort, 1810
- Genus Mesoclanculus Iredale, 1924 accepted as Clanculus Montfort, 1810
- Genus Microclanculus Cotton & Godfrey, 1934 accepted as Clanculus Montfort, 1810
- Genus Notogibbula Iredale, 1924 (5)
- Genus Otavia Risso, 1826 accepted as Clanculus Montfort, 1810
- Genus Paraclanculus Finlay, 1926
- Genus Piscoacritia DeVries & Hess, 2004 † (1)
- Genus Polydonta Schumacher, 1817 accepted as Trochus Linnaeus, 1758
- Genus Praecia J. E. Gray, 1857 accepted as Trochus (Praecia) J. E. Gray, 1857
- Genus Pulchrastele Iredale, 1929 (4)
- Genus Rubritrochus L. Beck, 1995 (10)
- Genus Thorista Iredale, 1915 accepted as Coelotrochus P. Fischer, 1879
- Genus Thoristella Iredale, 1915 accepted as Coelotrochus P. Fischer, 1879
- Genus Trochus Linnaeus, 1758 (44)
- Subfamily Umboniinae H. Adams & A. Adams, 1854 (1840) (161)
- Tribe Kaiparathinini B. A. Marshall, 1993 accepted as Kaiparathininae B. A. Marshall, 1993
- Genus Aaleniella M. A. Conti & J. C. Fischer, 1981 † (2)
- Genus Anthora J. E. Gray, 1857 accepted as Coelotrochus P. Fischer, 1879
- Genus Euriclanculus Cotton & Godfrey, 1934 accepted as Clanculus Montfort, 1810
- Genus Forskalena Iredale, 1918 accepted as Gibbula Risso, 1826
- Genus Forskalia H. Adams & A. Adams, 1854 accepted as Gibbula Risso, 1826
- Genus Guidonia de Stefani, 1880 † (1)
- Genus Lithotrochus Conrad, 1855 † (2)
- Genus Monodonta Bronn, 1831 †
- Genus Solariconulus [sic] † accepted as Solarioconulus Cossmann, 1918 †
- Genus Thaliota [sic] accepted as Thalotia Gray, 1847
- Genus Trypanotrochus Cossmann, 1918 † (2)
- Genus Tylotrochus Koken, 1896 † (2)
- Family Trochoidea incertae sedis (15)
- Family Turbinidae Rafinesque, 1815 (275)
- Family Tychobraheidae Horný, 1992 † (1)
- Family Velainellidae Vasseur, 1880 †
- Subfamily Minoliinae Kuroda, T. Habe & Oyama, 1971 accepted as Solariellidae A. W. B. Powell, 1951
- Subfamily Parataphrinae Calzada, 1989 † accepted as Proconulidae L. R. Cox, 1960 †
- Superfamily Fissurellacea accepted as Fissurelloidea J. Fleming, 1822
- Superfamily Trochacea accepted as Trochoidea Rafinesque, 1815
- Superfamily Turbinoidea Rafinesque, 1815 accepted as Trochoidea Rafinesque, 1815
- Superfamily Vetigastropoda incertae sedis (28)
- 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