Between brackets is the number of accepted species

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- Mollusca (133 273)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 082)
- Class Caudofoveata (143)
- Class Cephalopoda (1 917)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (103 018)
- Subclass Amphigastropoda † (434)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 827)
- Subclass Gastropoda incertae sedis (313)
- Subclass Heterobranchia (39 225)
- Subclass Neomphaliones accepted as Vetigastropoda
- Subclass Neritimorpha (1 916)
- Order Cycloneritida (1 860)
- Superfamily Helicinoidea A. Férussac, 1822 (799)
- Family Ceresidae Thiele, 1925 accepted as Proserpinellidae H. B. Baker, 1923
- Family Dawsonellidae Wenz, 1938 † (1)
- Family Deianiridae Wenz, 1938 † (8)
- Family Despoenidae R. B. Newton, 1891 accepted as Proserpinidae Gray, 1847
- Family Helicinidae A. Férussac, 1822 (726)
- Subfamily Bourcierinae Paetel, 1890 accepted as Helicininae A. Férussac, 1822
- Subfamily Ceratodiscinae Pilsbry, 1927 (3)
- Subfamily Dimorphoptychiinae Wenz, 1938 † (5)
- Subfamily Helicininae A. Férussac, 1822 (481)
- Genus Alcadia J. E. Gray, 1840 (66)
- Genus Aphanoconia A. J. Wagner, 1905 (39)
- Genus Bourciera L. Pfeiffer, 1852 (10)
- Genus Caloplisma Crosse & P. Fischer, 1893 accepted as Helicina (Tristramia) Crosse, 1863
- Genus Ceochasma F. G. Thompson, 1968 (1)
- Genus Ceratopoma Möllendorff, 1893 (8)
- Genus Cinctella A. J. Wagner, 1910 accepted as Helicina (Oxyrhombus) Crosse & P. Fischer, 1893
- Genus Concentrica A. J. Wagner, 1905 accepted as Helicina (Oxyrhombus) Crosse & P. Fischer, 1893
- Genus Diaphana Guppy, 1895 accepted as Helicina Lamarck, 1799
- Genus Discoidea A. J. Wagner, 1905 accepted as Nesiocina Richling & Bouchet, 2013
- Genus Diversicolor A. J. Wagner, 1905 accepted as Cochlostoma Jan, 1830
- Genus Emoda H. Adams & A. Adams, 1856 (16)
- Genus Eualcadia A. J. Wagner, 1907 accepted as Alcadia J. E. Gray, 1840
- Genus Glyptemoda Clench & Aguayo, 1950 (1)
- Genus Helicina Lamarck, 1799 (167)
- Genus Hemipoma A. J. Wagner, 1905 (1)
- Genus Hispida A. J. Wagner, 1907 accepted as Alcadia (Penisoltia) H. B. Baker, 1954
- Genus Idesa H. Adams & A. Adams, 1856 accepted as Alcadia (Idesa) H. Adams & A. Adams, 1856
- Genus Isoltia Guppy, 1895 accepted as Alcadia J. E. Gray, 1840
- Genus Kalokonia A. J. Wagner, 1905 accepted as Palaeohelicina A. J. Wagner, 1905
- Genus Kosmetopoma A. J. Wagner, 1905 (1)
- Genus Krebsia Guppy, 1895 accepted as Eutrochatella P. Fischer, 1885
- Genus Leialcadia A. J. Wagner, 1907 accepted as Alcadia (Idesa) H. Adams & A. Adams, 1856
- Genus Negopenia Iredale, 1941 (1)
- Genus Nesiocina Richling & Bouchet, 2013 (13)
- Genus Ogasawarana A. J. Wagner, 1905 (14)
- Genus Oligyra Say, 1818 accepted as Helicina Lamarck, 1799 (3)
- Genus Olygyra Say, 1818 accepted as Oligyra Say, 1818
- Genus Orbiculata A. J. Wagner, 1905 accepted as Helicina (Oligyra) Say, 1818
- Genus Orobophana A. J. Wagner, 1905 (7)
- Genus Pachystoma Guppy, 1895 accepted as Helicina Lamarck, 1799
- Genus Palaeohelicina A. J. Wagner, 1905 (17)
- Genus Pecoviana Iredale, 1941 (1)
- Genus Pestomena Iredale, 1941 accepted as Sulfurina Möllendorff, 1893
- Genus Pitonellus [sic] accepted as Pitonnillus Montfort, 1810
- Genus Pitonnillus Montfort, 1810 accepted as Helicina Lamarck, 1799
- Genus Pleuropoma Möllendorff, 1893 (37)
- Genus Pseudhelicina Sykes, 1907 accepted as Bourciera L. Pfeiffer, 1852
- Genus Punctisalcata A. J. Wagner, 1905 accepted as Helicina (Oxyrhombus) Crosse & P. Fischer, 1893
- Genus Retorquata A. J. Wagner, 1905 accepted as Helicina (Tristramia) Crosse, 1863
- Genus Rhabdokonia A. J. Wagner, 1905 accepted as Palaeohelicina A. J. Wagner, 1905
- Genus Rostrata A. J. Wagner, 1905 accepted as Helicina (Tristramia) Crosse, 1863
- Genus Schasicheila Shuttleworth, 1852 (12)
- Genus Schazichiela [sic] accepted as Schasicheila Shuttleworth, 1852
- Genus Schrammia Guppy, 1895 accepted as Alcadia (Idesa) H. Adams & A. Adams, 1856
- Genus Sphaeroconia A. J. Wagner, 1909 accepted as Aphanoconia A. J. Wagner, 1905
- Genus Stoastomops H. B. Baker, 1924 (4)
- Genus Sturanya A. J. Wagner, 1905 (46)
- Species Sturanya alrici (Crosse, 1888)
- Species Sturanya baldwini (Ancey, 1904)
- Species Sturanya benigna (Crosse, 1870)
- Species Sturanya beryllina (A. Gould, 1847)
- Species Sturanya carolinarum (Möllendorff, 1900)
- Species Sturanya dautzenbergi (A. J. Wagner, 1909)
- Species Sturanya delta (Pilsbry & C. M. Cooke, 1908)
- Species Sturanya epicharis A. J. Wagner, 1907
- Species Sturanya eutrochatelloides Richling, 2009
- Species Sturanya exanima (Neal, 1934) †
- Species Sturanya gallina (Gassies, 1870)
- Species Sturanya gassiesiana (Crosse, 1874)
- Species Sturanya interna (Mousson, 1870)
- Species Sturanya jetschini A. J. Wagner, 1905
- Species Sturanya juddii (Pilsbry & C. M. Cooke, 1908) †
- Species Sturanya julii (Baird, 1873)
- Species Sturanya kauaiensis (Pilsbry & C. M. Cooke, 1908)
- Species Sturanya koumacensis Richling, 2009
- Species Sturanya laciniosa (Mighels, 1945)
- Species Sturanya laeta (Crosse, 1870)
- Species Sturanya littoralis (Montrouzier, 1859)
- Species Sturanya macgillivrayi (L. Pfeiffer, 1855)
- Species Sturanya magdalenae (Ancey, 1890)
- Variety Sturanya magdalenae var. bryani (Neal, 1934) accepted as Sturanya magdalenae (Ancey, 1890)
- Variety Sturanya magdalenae var. makuaensis (Neal, 1934) accepted as Sturanya magdalenae (Ancey, 1890)
- Variety Sturanya magdalenae var. subtenuis (Neal, 1934) accepted as Sturanya magdalenae (Ancey, 1890)
- Species Sturanya makaroaensis Richling & Bouchet, 2013
- Species Sturanya matutina (Neal, 1934)
- Species Sturanya mediana (Gassies, 1870)
- Species Sturanya modesta (L. Pfeiffer, 1854)
- Species Sturanya mouensis (Crosse, 1870)
- Species Sturanya multicolor (A. Gould, 1847)
- Species Sturanya noumeensis (Crosse, 1874)
- Species Sturanya novaecaledoniae (Baird, 1873) accepted as Sturanya mediana (Gassies, 1870)
- Species Sturanya oahuensis (Pilsbry & C. M. Cooke, 1908)
- Species Sturanya parvula (Pease, 1868) accepted as Nesiocina parvula (Pease, 1868)
- Species Sturanya plicatilis (Mousson, 1865)
- Species Sturanya porphyrostoma (Crosse, 1870)
- Species Sturanya rossiteri (Crosse, 1895)
- Species Sturanya rotelloidea (Mighels, 1845)
- Species Sturanya rubiginosa A. J. Wagner, 1907
- Species Sturanya sandwichiensis (Souleyet, 1852)
- Species Sturanya singularis A. J. Wagner, 1907
- Species Sturanya sola (Neal, 1934)
- Species Sturanya sphaeroidea (L. Pfeiffer, 1855)
- Species Sturanya stokesii (Neal, 1934) †
- Species Sturanya sublaevigata (L. Pfeiffer, 1852)
- Species Sturanya sublaevigatoides Richling, 2009
- Species Sturanya subsculpta (Neal, 1934) †
- Species Sturanya tectiformis (Mousson, 1870)
- Species Sturanya uberta (A. Gould, 1847)
- Genus Sturanyella Pilsbry & C. M. Cooke, 1934 accepted as Sturanya A. J. Wagner, 1905
- Genus Succincta A. J. Wagner, 1905 accepted as Helicina Lamarck, 1799
- Genus Sulfurina Möllendorff, 1893 (16)
- Genus Tristramia Crosse, 1863 accepted as Helicina (Tristramia) Crosse, 1863
- Genus Trochatella Swainson, 1840 accepted as Eutrochatella P. Fischer, 1885
- Genus Turbinata A. J. Wagner, 1905 accepted as Helicina (Tristramia) Crosse, 1863
- Genus Verecunda A. J. Wagner, 1909 accepted as Aphanoconia A. J. Wagner, 1905
- Subfamily Hendersoniinae H. B. Baker, 1926 (8)
- Subfamily Stoastomatinae C. B. Adams, 1849 (80)
- Subfamily Vianinae H. B. Baker, 1922 (147)
- Genus Eohipptychia Bishop, 1980 † (1)
- Genus Pachytoma Swainson, 1840 accepted as Helicina Lamarck, 1799
- Genus Ptychochilus W. Yü, 1977 † (1)
- Family Neritiliidae Schepman, 1908 (32)
- Family Olygyridae Gray, 1847 accepted as Helicininae A. Férussac, 1822
- Family Proserpinellidae H. B. Baker, 1923 (21)
- Family Proserpinidae Gray, 1847 (11)
- Superfamily Hydrocenoidea Troschel, 1857 (133)
- Superfamily Naticopsoidea W. H. Waagen, 1880 † (64)
- Superfamily Neritoidea Rafinesque, 1815 (802)
- Superfamily Neritopsoidea J. E. Gray, 1847 (60)
- Superfamily Symmetrocapuloidea Wenz, 1938 † (2)
- Order Cycloneritimorpha accepted as Cycloneritida
- Order Cyrtoneritida † (11)
- Order Cyrtoneritimorpha † accepted as Cyrtoneritida †
- Order Neritimorpha incertae sedis (45)
- Subclass Orthogastropoda represented as Gastropoda
- Subclass Patellogastropoda (514)
- Subclass Prosobranchia
- Subclass Psilogastropoda represented as Gastropoda
- Subclass Vetigastropoda (6 789)
- 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 (1 381)
- Class Polyplaxiphora accepted as Polyplacophora
- Class Rostroconchia † (64)
- Class Scaphopoda (753)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata