Between brackets is the number of accepted species

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- Mollusca (132 851)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 013)
- Class Caudofoveata (143)
- Class Cephalopoda (1 834)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 753)
- Subclass Amphigastropoda † (396)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 670)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 919)
- Order Caenogastropoda incertae sedis (7 677)
- Order Littorinimorpha (17 189)
- Order Neogastropoda (23 738)
- Superfamily Buccinoidea Rafinesque, 1815 (5 253)
- 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)
- Family Concholepadidae Perrier, 1897 accepted as Rapaninae Gray, 1853
- Family Coralliophilidae Chenu, 1859 accepted as Coralliophilinae Chenu, 1859
- Family Magilidae Thiele, 1925 accepted as Coralliophilinae Chenu, 1859
- Family Muricidae Rafinesque, 1815 (2 937)
- Subfamily Aspellinae Keen, 1971 (547)
- Subfamily Colinae J. E. Gray, 1857 accepted as Colidae J. E. Gray, 1857
- Subfamily Coralliophilinae Chenu, 1859 (319)
- Subfamily Drupinae Wenz, 1938 accepted as Rapaninae Gray, 1853
- Subfamily Ergalataxinae Kuroda, T. Habe & Oyama, 1971 (188)
- Subfamily Haustrinae K. S. Tan, 2003 (18)
- Subfamily Muricidae incertae sedis (209)
- Genus Beyregrex Merle, 2024 † (5)
- Genus Daphnellopsis Schepman, 1913 (14)
- Genus Flexopteron Shuto, 1969 (17)
- Genus Harmatia Noszky, 1940 † (3)
- Genus Homalocantha Mörch, 1852 (25)
- Genus Ingensiella B. A. Marshall & Houart, 2022 (1)
- Genus Kotakasyrinx H. Noda, 1980 † accepted as Mipus De Gregorio, 1885
- Genus Lenitrophon H. J. Finlay, 1926 (1)
- Genus Lirosoma Conrad, 1862 † (2)
- Genus Marchia Jousseaume, 1880 accepted as Pterynotus Swainson, 1833
- Genus Minortrophon H. J. Finlay, 1926 (1)
- Genus Paramorea Wade, 1917 † (2)
- Genus Ponderia Houart, 1986 (16)
- Genus Pseudotrophonopsis Merle, 2024 † (1)
- Genus Pteronotus Swainson, 1833 accepted as Pterynotus Swainson, 1833
- Genus Pterymarchia Houart, 1995 accepted as Pterynotus (Pterymarchia) Houart, 1995
- Genus Pterymurex Rovereto, 1899 accepted as Pterynotus Swainson, 1833
- Genus Pterynotus Swainson, 1833 (24)
- Genus Scalaspira Conrad, 1862 † (7)
- Species Scalaspira alexeevi Amitrov & Zhegallo, 2007 †
- Species Scalaspira harasewychi Petuch, 1988 †
- Species Scalaspira haueri (R. Hoernes, 1875) † accepted as Xenofusinus haueri (R. Hoernes, 1875) †
- Species Scalaspira korobkovi Amitrov & Zhegallo, 2007 †
- Species Scalaspira kumsuatensis Amitrov & Zhegallo, 2007 †
- Species Scalaspira multisulcata (Nyst, 1845) †
- Species Scalaspira strumosa (Conrad, 1832) †
- Species Scalaspira subgregaria (Ilyina, 1955) †
- Genus Stenomphalus Sandberger, 1861 †
- Genus Stephanosalpinx Petuch, 1988 † (1)
- Genus Timbellus De Gregorio, 1885 (73)
- Genus Transtrafer Iredale, 1929 accepted as Vitularia Swainson, 1840
- Genus Uttleya Marwick, 1934 (7)
- Genus Vitularia Swainson, 1840 (9)
- Genus Vitulina Swainson, 1840 accepted as Vitularia Swainson, 1840
- Subfamily Muricinae Rafinesque, 1815 (493)
- Subfamily Muricopsinae Radwin & D'Attilio, 1971 accepted as Aspellinae Keen, 1971
- Subfamily Nucellopsinae Merle, 2024 † (5)
- Subfamily Ocenebrinae Cossmann, 1903 (561)
- Subfamily Pagodulinae Barco, Schiaparelli, Houart & Oliverio, 2012 (266)
- Subfamily Purpurellinae Bellardi, 1882 † accepted as Rapaninae Gray, 1853
- Subfamily Rapaninae Gray, 1853 (178)
- Subfamily Taurasinae Sacco, 1904 † accepted as Rapaninae Gray, 1853
- Subfamily Tripterotyphinae D'Attilio & C. M. Hertz, 1988 accepted as Muricopsinae Radwin & D'Attilio, 1971
- Subfamily Tritonaliinae Korobkov, 1955 accepted as Ocenebrinae Cossmann, 1903
- Subfamily Trophoninae Cossmann, 1903 accepted as Ocenebrinae Cossmann, 1903
- Subfamily Typhinae Cossmann, 1903 (153)
- Family Muricoidea incertae sedis (3)
- Family Nucellidae A. E. Salisbury, 1940 accepted as Ocenebrinae Cossmann, 1903
- Family Purpuridae Children, 1823 accepted as Rapaninae Gray, 1853
- Family Rapidae Kuroda, 1941 accepted as Coralliophilinae Chenu, 1859
- Family Thaididae Jousseaume, 1888 accepted as Rapaninae Gray, 1853
- Family Typhidae Cossmann, 1903 accepted as Typhinae Cossmann, 1903
- Subfamily Eburninae Swainson, 1840 accepted as Babyloniidae Kuroda, Habe & Oyama, 1971
- Subfamily Latrunculinae Cossmann, 1901 accepted as Babyloniidae Kuroda, Habe & Oyama, 1971
- 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