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)
- Family Acusidae J. E. Gray, 1853 accepted as Terebridae Mörch, 1852
- Family Borsoniidae Bellardi, 1875 (571)
- Family Bouchetispiridae Kantor, E. E. Strong & Puillandre, 2012 (2)
- Family Clathurellidae H. Adams & A. Adams, 1858 (334)
- Family Clavatulidae J. E. Gray, 1853 (438)
- Family Clavidae T. L. Casey, 1904 accepted as Drilliidae Olsson, 1964
- Family Clionellidae W. Stimpson, 1865 accepted as Clavatulidae J. E. Gray, 1853
- Family Cochlespiridae A. W. B. Powell, 1942 (114)
- Family Conidae J. Fleming, 1822 (1 393)
- Family Conilithidae J. K. Tucker & M. Tenorio, 2009 accepted as Conidae J. Fleming, 1822
- Family Conoidea incertae sedis (318)
- Family Conorbidae De Gregorio, 1880 (19)
- Family Conusidae J. Fleming, 1822 accepted as Conidae J. Fleming, 1822
- Family Cryptoconidae Cossmann, 1896 † (22)
- Family Drilliidae Olsson, 1964 (769)
- Family Fusiturridae Abdelkrim, Aznar-Cormano, Fedosov, Kantor, Lozouet, Phuong, Zaharias & Puillandre, 2018 (19)
- Family Horaiclavidae Bouchet, Kantor, Sysoev & Puillandre, 2011 (315)
- Family Mangeliidae P. Fischer, 1883 (1 064)
- Family Marshallenidae Abdelkrim, Aznar-Cormano, Fedosov, Kantor, Lozouet, Phuong, Zaharias & Puillandre, 2018 (5)
- Family Melatomidae Gill, 1871 accepted as Clavatulidae J. E. Gray, 1853
- Family Mitrolumnidae Sacco, 1904 accepted as Mitromorphidae T. L. Casey, 1904
- Family Mitromorphidae T. L. Casey, 1904 (219)
- Family Pervicaciidae Rudman, 1969 accepted as Terebridae Mörch, 1852
- Family Pleurotomidae J. E. Gray, 1838 accepted as Turridae H. Adams & A. Adams, 1853 (1838)
- Family Pseudomelatomidae J. P. E. Morrison, 1966 (781)
- Family Raphitomidae Bellardi, 1875 (1 158)
- Family Strictispiridae J. H. McLean, 1971 accepted as Pseudomelatomidae J. P. E. Morrison, 1966
- Family Taranteconidae J. K. Tucker & M. Tenorio, 2009 accepted as Conidae J. Fleming, 1822
- Family Terebridae Mörch, 1852 (750)
- Subfamily Pellifroniinae Fedosov, Malcolm, Terryn, Gorson, Modica, Holford & Puillandre, 2020 (7)
- Subfamily Pervicaciinae Rudman, 1969 (104)
- Subfamily Terebrinae Mörch, 1852 (638)
- Genus Abretia H. Adams & A. Adams, 1853 accepted as Abretiella Dall, 1923
- Genus Abretiella Dall, 1923 accepted as Oxymeris Dall, 1903
- Genus Acuminia Dall, 1908 accepted as Hastula H. Adams & A. Adams, 1853
- Genus Acus J. E. Gray, 1847 accepted as Oxymeris Dall, 1903
- Genus Brevimyurella Oyama, 1961 accepted as Punctoterebra Bartsch, 1923
- Genus Cinguloterebra Oyama, 1961 accepted as Terebra Bruguière, 1789 (1)
- Genus Clathroterebra Oyama, 1961 accepted as Myurella Hinds, 1845
- Genus Decorihastula Oyama, 1961 accepted as Myurella Hinds, 1845
- Genus Dimidacus Iredale, 1929 accepted as Terebra Bruguière, 1789
- Genus Egentelaria Rehder, 1980 accepted as Hastula H. Adams & A. Adams, 1853
- Genus Euterebra Cotton & Godfrey, 1932 accepted as Duplicaria Dall, 1908
- Genus Gemmaterebra Cotton, 1952 † (3)
- Genus Gradaterebra Cotton & Godfrey, 1932 (10)
- Genus Granuliterebra Oyama, 1961 (6)
- Genus Hastula H. Adams & A. Adams, 1853 (104)
- Genus Hastulina Oyama, 1961 accepted as Hastula H. Adams & A. Adams, 1853
- Genus Hastulopsis Oyama, 1961 (20)
- Genus Impages E. A. Smith, 1873 accepted as Hastula H. Adams & A. Adams, 1853
- Genus Kaweka Marwick, 1931 † (3)
- Genus Laevihastula Petuch, 1988 † (2)
- Genus Maculauger Fedosov, Malcolm, Terryn, Gorson, Modica, Holford & Puillandre, 2020 (12)
- Genus Microtrypetes Pilsbry & H. N. Lowe, 1932 (4)
- Genus Mirula K. van W. Palmer, 1942 † (1)
- Genus Myurella Hinds, 1845 (44)
- Genus Myurellopsis Fedosov, Malcolm, Terryn, Gorson, Modica, Holford & Puillandre, 2020 (23)
- Genus Neoterebra Fedosov, Malcolm, Terryn, Gorson, Modica, Holford & Puillandre, 2020 (86)
- Genus Noditerebra Cossmann, 1896 † accepted as Terebra Bruguière, 1789
- Genus Nototerebra Cotton, 1947 accepted as Oxymeris Dall, 1903
- Genus Oxymeris Dall, 1903 (30)
- Genus Panaterebra Olsson, 1967 accepted as Terebra Bruguière, 1789
- Genus Paraterebra Woodring, 1928 accepted as Terebra Bruguière, 1789
- Genus Perirhoe Dall, 1908 (1)
- Genus Pristiterebra Oyama, 1961 (6)
- Genus Profunditerebra Fedosov, Malcolm, Terryn, Gorson, Modica, Holford & Puillandre, 2020 (13)
- Genus Punctoterebra Bartsch, 1923 (62)
- Genus Strioterebrum Sacco, 1891 † (12)
- Genus Subula Schumacher, 1817 accepted as Terebra Bruguière, 1789
- Genus Terebra Bruguière, 1789 (178)
- Genus Terebrum Montfort, 1810 accepted as Terebra Bruguière, 1789
- Genus Terenolla Iredale, 1929 accepted as Myurella Hinds, 1845
- Species Terenolla pygmaea (Hinds, 1844) accepted as Myurella pygmaea (Hinds, 1844)
- Genus Triplostephanus Dall, 1908 accepted as Terebra Bruguière, 1789 (1)
- Genus Vertagus Link, 1807 accepted as Terebra Bruguière, 1789
- Genus Zeacuminia H. J. Finlay, 1930 † (16)
- Genus Spineoterebra Sacco, 1891 † (1)
- Family Thatcheriidae A. W. B. Powell, 1942 accepted as Raphitomidae Bellardi, 1875
- Family Turridae H. Adams & A. Adams, 1853 (1838) (383)
- Subfamily Andoniinae Vera-Peláez, 2002 † accepted as Raphitomidae Bellardi, 1875
- Subfamily Crassispirinae J. H. McLean, 1971 accepted as Pseudomelatomidae J. P. E. Morrison, 1966
- Subfamily Cytharinae Thiele, 1929 accepted as Mangeliidae P. Fischer, 1883
- Subfamily Daphnellinae T. L. Casey, 1904 accepted as Raphitomidae Bellardi, 1875
- Subfamily Diptychomitrinae Bellardi, 1888 accepted as Mitromorphidae T. L. Casey, 1904
- Subfamily Oenopotinae Bogdanov, 1987 accepted as Mangeliidae P. Fischer, 1883
- Subfamily Pleurotomellinae F. Nordsieck, 1968 accepted as Raphitomidae Bellardi, 1875
- Subfamily Pseudotominae Bellardi, 1875 accepted as Borsoniidae Bellardi, 1875
- Subfamily Pusionellinae J. E. Gray, 1853 accepted as Clavatulidae J. E. Gray, 1853
- Subfamily Taraninae T. L. Casey, 1904 accepted as Raphitomidae Bellardi, 1875
- Subfamily Turriculinae A. W. B. Powell, 1942 accepted as Clavatulidae J. E. Gray, 1853
- Subfamily Zemaciinae Sysoev, 2003 accepted as Borsoniidae Bellardi, 1875
- Subfamily Zonulispirinae J. H. McLean, 1971 accepted as Pseudomelatomidae J. P. E. Morrison, 1966
- 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