Between brackets is the number of accepted species

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- Mollusca (132 708)
- 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 (1 827)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 646)
- Subclass Amphigastropoda † (387)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 590)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 916)
- Order Caenogastropoda incertae sedis (7 676)
- Order Littorinimorpha (17 166)
- Order Neogastropoda (23 685)
- Superfamily Buccinoidea Rafinesque, 1815 (5 253)
- Superfamily Cancellarioidea Forbes & Hanley, 1851 accepted as Volutoidea Rafinesque, 1815
- Superfamily Conoidea J. Fleming, 1822 (8 671)
- Superfamily Mitroidea Swainson, 1831 (633)
- Superfamily Muricacea accepted as Muricoidea Rafinesque, 1815
- Superfamily Muricoidea Rafinesque, 1815 (2 912)
- 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 (2 909)
- Subfamily Aspellinae Keen, 1971 (539)
- Subfamily Colinae J. E. Gray, 1857 accepted as Colidae J. E. Gray, 1857
- Subfamily Coralliophilinae Chenu, 1859 (306)
- Subfamily Drupinae Wenz, 1938 accepted as Rapaninae Gray, 1853
- Subfamily Ergalataxinae Kuroda, T. Habe & Oyama, 1971 (181)
- Subfamily Haustrinae K. S. Tan, 2003 (18)
- Subfamily Muricidae incertae sedis (209)
- 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 (267)
- Subfamily Purpurellinae Bellardi, 1882 † accepted as Rapaninae Gray, 1853
- Subfamily Rapaninae Gray, 1853 (177)
- Genus Acanthais Vermeij & S. P. Kool, 1994 (2)
- Genus Adamsia Dunker, 1857 accepted as Agnewia Tenison Woods, 1878
- Genus Agnewia Tenison Woods, 1878 (3)
- Genus Amplidrupa Vermeij, 2023 (3)
- Genus Califrapana C. L. Powell & Houart, 2021 † (1)
- Genus Cheletropis Forbes, 1852 accepted as Agnewia Tenison Woods, 1878
- Genus Concholepas Lamarck, 1801 (6)
- Genus Conchopatella H. Adams & A. Adams, 1853 accepted as Concholepas Lamarck, 1801
- Genus Conchulus Rafinesque, 1815 accepted as Concholepas Lamarck, 1801
- Genus Condonia Hertlein, 1965 †
- Genus Conothais Kuroda, 1930 accepted as Pinaxia H. Adams & A. Adams, 1853
- Genus Cuma Swainson, 1840 accepted as Cymia Mörch, 1860
- Genus Cumopsis Rovereto, 1899 accepted as Cymia Mörch, 1860
- Genus Cymia Mörch, 1860 (6)
- Genus Dicathais Macpherson & Gabriel, 1962 (2)
- Genus Drupa Röding, 1798 (6)
- Genus Drupina Dall, 1923 (2)
- Genus Edithais Vermeij, 1998 † (3)
- Genus Indothais Claremont, Vermeij, S. T. Williams & D. Reid, 2013 (13)
- Genus Iopas H. Adams & A. Adams, 1853 accepted as Nassa Röding, 1798
- Genus Jopas accepted as Iopas H. Adams & A. Adams, 1853
- Genus Mancinella Link, 1807 (12)
- Genus Menathais Iredale, 1937 (4)
- Genus Microtoma Swainson, 1840 accepted as Plicopurpura Cossmann, 1903
- Genus Nassa Röding, 1798 (6)
- Genus Neorapana A. H. Cooke, 1918 (4)
- Genus Neothais Iredale, 1912 (5)
- Genus Patellipurpura Dall, 1909 accepted as Plicopurpura Cossmann, 1903
- Genus Penethais Vermeij, 2024 (3)
- Genus Pentadactylus Mörch, 1852 accepted as Drupa Röding, 1798
- Genus Phycothais K. S. Tan, 2003 (4)
- Genus Pinaxia H. Adams & A. Adams, 1853 (2)
- Genus Plicopurpura Cossmann, 1903 (3)
- Genus Provexillum Hedley, 1918 accepted as Vexilla Swainson, 1840
- Genus Purpura Bruguière, 1789 (7)
- Genus Purpurella Dall, 1872 accepted as Plicopurpura Cossmann, 1903
- Genus Purpurella Bellardi, 1882 † accepted as Taurasia Bellardi, 1882
- Genus Rapana Schumacher, 1817 (4)
- Genus Rapanecphora Petuch, 1989 † (2)
- Genus Reishia Kuroda & Habe, 1971 (6)
- Genus Ricinella Schumacher, 1817 (2)
- Genus Ricinula Lamarck, 1816
- Genus Semiricinula E. von Martens, 1879 (12)
- Genus Simplicotaurasia Sacco, 1890 † accepted as Taurasia Bellardi, 1882
- Genus Sistrum Montfort, 1810 (4)
- Genus Stramonita Schumacher, 1817 (15)
- Genus Taurasia Bellardi, 1882 (6)
- Genus Thais Röding, 1798 (6)
- Genus Thaisella Clench, 1947 (10)
- Genus Tribulus H. Adams & A. Adams, 1853 (1)
- Genus Tylothais Houart, 2017 (7)
- Genus Vasula Mörch, 1860 (3)
- Genus Vexilla Swainson, 1840 (2)
- 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 † (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 (39 154)
- 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