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- Mollusca (132 754)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (24 992)
- Class Caudofoveata (143)
- Class Cephalopoda (1 832)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 679)
- Subclass Amphigastropoda † (387)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 623)
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 154)
- Infraclass "Lower Heterobranchia" (1 137)
- Infraclass Euthyneura (37 431)
- Subterclass Acteonimorpha (411)
- Subterclass Ringipleura (2 917)
- Subterclass Tectipleura (34 103)
- Superorder Acochlidiimorpha (48)
- Superorder Ascoglossa accepted as Sacoglossa
- Superorder Basommatophora accepted as Hygrophila
- Superorder Eupulmonata (25 567)
- Order Aillyida accepted as Achatinina
- Order Ellobiida (579)
- Order Gymnomorpha accepted as Systellommatophora
- Order Stylommatophora (24 764)
- Suborder Achatinina (2 899)
- Suborder Elasmognatha accepted as Succineoidei
- Suborder Helicina (21 625)
- Infraorder Arionoidei (140)
- Infraorder Clausilioidei (1 859)
- Infraorder Helicina incertae sedis (3 210)
- Infraorder Helicoidei (5 690)
- Infraorder Limacoidei (4 250)
- Superfamily Dyakioidea Gude & B. B. Woodward, 1921 accepted as Trochomorphoidea Mörch, 1864
- Superfamily Gastrodontoidea Tryon, 1866 (621)
- Family Daudebardiidae Kobelt, 1906 accepted as Daudebardiinae Kobelt, 1906
- Family Gastrodontidae Tryon, 1866 (208)
- Family Oxychilidae Hesse, 1927 (1879) (216)
- Subfamily Daudebardiinae Kobelt, 1906 (34)
- Subfamily Godwiniinae C. M. Cooke, 1921 accepted as Gastrodontidae Tryon, 1866 (1)
- Subfamily Nastiinae A. Riedel, 1989 (21)
- Subfamily Oxychilinae P. Hesse, 1927 (150)
- Genus Allogenes Gude, 1911 (1)
- Genus Araboxychilus A. Riedel, 1977 (1)
- Genus Birulana Lindholm, 1922 accepted as Eopolita Pollonera, 1916
- Genus Cellariopsis A. J. Wagner, 1914 (1)
- Genus Conulopolita O. Boettger, 1879 (12)
- Genus Cretozonites Kobelt, 1890 accepted as Oxychilus (Helicophana) Westerlund, 1886
- Genus Diaphanella P. Hesse, 1916 accepted as Mediterranea Clessin, 1880
- Genus Discoxychilus A. Riedel, 1966 (1)
- Genus Eopolita Pollonera, 1916 (3)
- Genus Euhyalina Albers, 1857 accepted as Oxychilus Fitzinger, 1833
- Genus Gastranodon O. Boettger, 1889 (1)
- Genus Gemma Hazay, 1885 accepted as Morlina A. J. Wagner, 1914
- Genus Geodiaphana Thiele, 1917 accepted as Mediterranea Clessin, 1880
- Genus Helicella J. E. Gray, 1847 accepted as Oxychilus Fitzinger, 1833
- Genus Hyalinia Charpentier, 1837 accepted as Oxychilus Fitzinger, 1833
- Subgenus Hyalinia (Ammonoceras) L. Pfeiffer, 1855 accepted as Happia Bourguignat, 1890
- Subgenus Hyalinia (Arnouldia) Bourguignat, 1891 accepted as Arnouldia Bourguignat, 1891
- Subgenus Hyalinia (Conulopolita) O. Boettger, 1879 accepted as Conulopolita O. Boettger, 1879
- Subgenus Hyalinia (Conulus) Fitzinger, 1833 accepted as Euconulus Reinhardt, 1883
- Subgenus Hyalinia (Euhyalina) Albers, 1857 accepted as Oxychilus Fitzinger, 1833
- Subgenus Hyalinia (Euhyalinia) J. W. Taylor, 1907 accepted as Oxychilus Fitzinger, 1833
- Subgenus Hyalinia (Gastranodon) O. Boettger, 1889 accepted as Gastranodon O. Boettger, 1889
- Subgenus Hyalinia (Glyphyalinia) E. von Martens, 1892 accepted as Glyphyalinia E. von Martens, 1892
- Subgenus Hyalinia (Gyralina) Andreae, 1902 accepted as Gyralina Andreae, 1902
- Subgenus Hyalinia (Helicophana) Westerlund, 1886 accepted as Oxychilus (Helicophana) Westerlund, 1886
- Subgenus Hyalinia (Hiramia) Pallary, 1939 accepted as Oxychilus (Hiramia) A. Riedel, 1962
- Subgenus Hyalinia (Hyalinia) Charpentier, 1837 accepted as Oxychilus Fitzinger, 1833
- Subgenus Hyalinia (Hyalocornea) Monterosato, 1892 accepted as Oxychilus (Hyalocornea) Monterosato, 1892
- Subgenus Hyalinia (Hyalofulgida) Monterosato, 1892 accepted as Oxychilus Fitzinger, 1833
- Subgenus Hyalinia (Hyalofusca) Monterosato, 1892 accepted as Oxychilus (Hyalofusca) Monterosato, 1892
- Subgenus Hyalinia (Hydatina) Westerlund, 1886 accepted as Hydatina Westerlund, 1886
- Subgenus Hyalinia (Mesomphix) Rafinesque, 1819 accepted as Mesomphix Rafinesque, 1819
- Species Hyalinia (Mesomphix) alleryi Paulucci, 1878 accepted as Oxychilus (Oxychilus) fuscosus (Rossmässler, 1838)
- Species Hyalinia (Mesomphix) carotii Paulucci, 1878 accepted as Schistophallus carotii (Paulucci, 1878)
- Species Hyalinia (Mesomphix) elegans O. Boettger, 1881 accepted as Schistophallus elegans (O. Boettger, 1881)
- Species Hyalinia (Mesomphix) fragrans Paulucci, 1878 accepted as Schistophallus carotii (Paulucci, 1878)
- Species Hyalinia (Mesomphix) pilula Westerlund, 1886 accepted as Oxychilus pilula (Westerlund, 1886)
- Species Hyalinia (Mesomphix) pontica O. Boettger, 1881
- Species Hyalinia (Mesomphix) ptychoraphe (Weinland & E. von Martens, 1859) accepted as Mesomphix ptychoraphe (Weinland & E. von Martens, 1859)
- Subgenus Hyalinia (Morlina) A. J. Wagner, 1914 accepted as Morlina A. J. Wagner, 1914
- Subgenus Hyalinia (Polita) Held, 1838 accepted as Oxychilus Fitzinger, 1833
- Subgenus Hyalinia (Retinella) P. Fischer, 1877 accepted as Retinella P. Fischer, 1877
- Subgenus Hyalinia (Vitrea) Fitzinger, 1833 accepted as Vitrea Fitzinger, 1833
- Subgenus Hyalinia (Zonitoides) Lehmann, 1862 accepted as Zonitoides Lehmann, 1862
- Species Hyalinia abchasica Retowski, 1914 accepted as Vitrea contracta (Westerlund, 1871)
- Species Hyalinia absoloni A. J. Wagner, 1914 accepted as Oxychilus absoloni (A. J. Wagner, 1914)
- Species Hyalinia achyophila Locard, 1899 accepted as Oxychilus draparnaudi (H. Beck, 1837)
- Species Hyalinia algarvensis Locard, 1899 accepted as Oxychilus draparnaudi (H. Beck, 1837)
- Species Hyalinia alicea (Guppy, 1871) accepted as Happia alicea (Guppy, 1871)
- Species Hyalinia alliaria (J. S. Miller, 1822) accepted as Oxychilus alliarius (J. S. Miller, 1822)
- Species Hyalinia andreaei O. Boettger, 1880 accepted as Vitrea crystallina (O. F. Müller, 1774)
- Species Hyalinia applanata K. Miller, 1907 † accepted as Oxychilus applanatus (K. Miller, 1907) †
- Species Hyalinia baldwini Ancey, 1889 accepted as Nesovitrea pauxilla (A. Gould, 1852)
- Species Hyalinia barbozana da Silva e Castro, 1873 accepted as Oxychilus draparnaudi (H. Beck, 1837)
- Species Hyalinia blanci P. Hesse, 1882 accepted as Vitrea contracta (Westerlund, 1871)
- Species Hyalinia blidahensis Locard, 1899 accepted as Oxychilus cellarius (O. F. Müller, 1774)
- Species Hyalinia brujasensis Fontannes, 1884 † accepted as Oxychilus brujasensis (Fontannes, 1884) †
- Species Hyalinia camelina (Bourguignat, 1852) accepted as Schistophallus camelinus (Bourguignat, 1852)
- Species Hyalinia casteli Viguier, 1892 † accepted as Macrozonites casteti (Viguier, 1892) †
- Species Hyalinia chathamensis Dall, 1893 accepted as Glyphyalus chathamensis (Dall, 1893)
- Species Hyalinia chelia Locard, 1899 accepted as Oxychilus draparnaudi (H. Beck, 1837)
- Species Hyalinia cheliella Pechaud, 1884
- Species Hyalinia chersa Bourguignat, 1877 accepted as Oxychilus cellarius (O. F. Müller, 1774)
- Species Hyalinia clessini P. Hesse, 1882 accepted as Vitrea clessini (P. Hesse, 1882)
- Species Hyalinia colliourensis Locard, 1894 accepted as Oxychilus colliourensis (Locard, 1894)
- Species Hyalinia densegyrata M. Kimakowicz, 1890 accepted as Vitrea erjaveci (Brusina, 1870)
- Species Hyalinia denselineata P. Hesse, 1914 accepted as Oxychilus denselineata (P. Hesse, 1914)
- Species Hyalinia diducta Westerlund, 1886 accepted as Oxychilus diductus (Westerlund, 1886)
- Species Hyalinia difficilis O. Boettger, 1888 accepted as Schistophallus difficilis (O. Boettger, 1888)
- Species Hyalinia fodereana Bourguignat, 1880 accepted as Oxychilus draparnaudi (H. Beck, 1837)
- Species Hyalinia globosa K. Miller, 1907 † accepted as Oxychilus globosus (K. Miller, 1907) †
- Species Hyalinia glomerula E. von Martens, 1892 accepted as Zonitoides glomerulus (E. von Martens, 1892)
- Species Hyalinia gomezi G. B. Sowerby III, 1892
- Species Hyalinia gyrocurtopsis Locard, 1894 accepted as Oxychilus draparnaudi (H. Beck, 1837)
- Species Hyalinia heracleensis Westerlund, 1893 accepted as Oxychilus cellarius (O. F. Müller, 1774)
- Species Hyalinia hiulciformis Locard, 1899 accepted as Oxychilus draparnaudi (H. Beck, 1837)
- Species Hyalinia hoffmanni E. von Martens, 1892 accepted as Zonitoides hoffmanni (E. von Martens, 1892)
- Species Hyalinia horsti Reibisch, 1892 accepted as Schistophallus horsti (Reibisch, 1892)
- Species Hyalinia hyblensis Kobelt, 1881 accepted as Vitrea subrimata (Reinhardt, 1871)
- Species Hyalinia hypogaea Ancey, 1884 accepted as Vitrea (Crystallus) pseudohydatina (Bourguignat, 1856)
- Species Hyalinia iheringi Clessin, 1888 accepted as Happia iheringi (Clessin, 1888)
- Species Hyalinia ihli Klika, 1891 † accepted as Retinella (Lyrodiscus) ihli (Klika, 1891) †
- Species Hyalinia iphigeniae LIndholm, 1926 accepted as Oxychilus (Oxychilus) iphigeniae (Lindholm, 1910)
- Species Hyalinia ischnusae Westerlund, 1888
- Species Hyalinia jetschini M. Kimakowicz, 1890 accepted as Vitrea jetschini (M. Kimakowicz, 1890)
- Species Hyalinia koutaisanus (Mousson, 1863) accepted as Oxychilus mingrelicus koutaisanus (Mousson, 1863)
- Species Hyalinia krynicki Clessin, 1883 accepted as Oxychilus deilus (Bourguignat, 1857)
- Species Hyalinia laeviuscula Sterki, 1892 accepted as Lucilla singleyana (Pilsbry, 1889)
- Species Hyalinia lauta Locard, 1899 accepted as Oxychilus cellarius (O. F. Müller, 1774)
- Species Hyalinia lusitanica Locard, 1899 accepted as Oxychilus cellarius (O. F. Müller, 1774)
- Species Hyalinia magonensis Locard, 1894 accepted as Oxychilus draparnaudi (H. Beck, 1837)
- Species Hyalinia majori Westerlund, 1886 accepted as Oxychilus majori (Westerlund, 1886)
- Species Hyalinia mariannae Westerlund, 1878
- Species Hyalinia maritae M. Kimakowicz, 1890 accepted as Vitrea subrimata (Reinhardt, 1871)
- Species Hyalinia maroccana Pallary, 1899
- Species Hyalinia mauriceti Locard, 1894 accepted as Oxychilus draparnaudi (H. Beck, 1837)
- Species Hyalinia meridionalis Paulucci, 1881 accepted as Oxychilus meridionalis (Paulucci, 1881)
- Species Hyalinia milium (E. S. Morse, 1859) accepted as Striatura milium (E. S. Morse, 1859)
- Species Hyalinia minuscula (A. Binney, 1840) accepted as Hawaiia minuscula (A. Binney, 1841)
- Species Hyalinia misella Westerlund, 1888
- Species Hyalinia mitis (L. Pfeiffer, 1863) accepted as Aenigmatoconcha mitis (L. Pfeiffer, 1863)
- Species Hyalinia mixta Westerlund, 1886
- Species Hyalinia molleriana Locard, 1899 accepted as Oxychilus draparnaudi (H. Beck, 1837)
- Species Hyalinia montivaga M. Kimakowicz, 1890 accepted as Mediterranea montivaga (M. Kimakowicz, 1890)
- Species Hyalinia montsicci Fagot, 1890 accepted as Oxychilus cellarius (O. F. Müller, 1774)
- Species Hyalinia muelleri Maltzan, 1887 accepted as Oxychilus superfluus (L. Pfeiffer, 1849)
- Species Hyalinia nautiliformis A. J. Wagner, 1914 accepted as Oxychilus nautiliformis (A. J. Wagner, 1914)
- Species Hyalinia necessaria Westerlund, 1886 accepted as Oxychilus superfluus (L. Pfeiffer, 1849)
- Species Hyalinia neglecta Fagot, 1890 accepted as Oxychilus cellarius (O. F. Müller, 1774)
- Species Hyalinia olearis Westerlund, 1883
- Species Hyalinia olivetorum (Gmelin, 1791) accepted as Retinella olivetorum (Gmelin, 1791)
- Species Hyalinia oppressa Shuttleworth, 1877 accepted as Oxychilus (Oxychilus) oppressus (Shuttleworth, 1877)
- Species Hyalinia oschtenica O. Boettger, 1888 accepted as Oxychilus oschtenicus (O. Boettger, 1888)
- Species Hyalinia oxystoma Westerlund, 1888
- Species Hyalinia paulucciae De Stefani, 1883 accepted as Oxychilus (Oxychilus) paulucciae (De Stefani, 1883)
- Species Hyalinia persica O. Boettger, 1889
- Species Hyalinia perspectiva Kobelt, 1881 accepted as Oxychilus perspectivus (Kobelt, 1881)
- Species Hyalinia petronella (L. Pfeiffer, 1853) accepted as Perpolita petronella (L. Pfeiffer, 1853)
- Species Hyalinia planorbis Möllendorff, 1899 accepted as Mediterranea planorbis (Möllendorff, 1899)
- Species Hyalinia porroi Paulucci, 1882 accepted as Oxychilus draparnaudi (H. Beck, 1837)
- Species Hyalinia procellaria Jooss, 1918 † accepted as Aegopinella procellaria (Jooss, 1918) †
- Species Hyalinia pygmaea O. Boettger, 1880 accepted as Vitrea pygmaea (O. Boettger, 1880)
- Species Hyalinia raddei O. Boettger, 1879 accepted as Conulopolita raddei (O. Boettger, 1879)
- Species Hyalinia renaniana Pallary, 1939 accepted as Oxychilus renanianus (Pallary, 1939)
- Species Hyalinia ressmanni Westerlund, 1883 accepted as Aegopinella ressmanni (Westerlund, 1883)
- Species Hyalinia rouvieri Locard, 1899 accepted as Oxychilus cellarius (O. F. Müller, 1774)
- Species Hyalinia rumelica P. Hesse, 1913 accepted as Oxychilus deilus (Bourguignat, 1857)
- Species Hyalinia shuttleworthiana Pini, 1884 accepted as Oxychilus shuttleworthianus (Pini, 1883)
- Species Hyalinia siaretana O. Boettger, 1889 accepted as Gastranodon siaretanus (O. Boettger, 1889)
- Species Hyalinia singleyana (Pilsbry, 1889) accepted as Lucilla singleyana (Pilsbry, 1889)
- Species Hyalinia spratti Westerlund, 1892 accepted as Schistophallus spratti (Westerlund, 1892)
- Species Hyalinia stauropolitana Rosen, 1903 accepted as Aegopinella minor (Stabile, 1864)
- Species Hyalinia sterkii (Dall, 1888) accepted as Guppya sterkii (Dall, 1888)
- Species Hyalinia stramicensis Locard, 1894 † accepted as Oxychilus draparnaudi (H. Beck, 1837)
- Species Hyalinia subconspicua Stache, 1889 †
- Species Hyalinia subfarinesiana Locard, 1894 accepted as Oxychilus cellarius (O. F. Müller, 1774)
- Species Hyalinia sublenticularis O. Boettger, 1889 accepted as Miradiscops sublenticularis (O. Boettger, 1889)
- Species Hyalinia tenerrima P. Hesse, 1914 accepted as Eopolita protensa tenerrima (P. Hesse, 1914)
- Species Hyalinia texana Sterki, 1892 accepted as Lucilla singleyana (Pilsbry, 1889)
- Species Hyalinia tschapecki Westerlund, 1888
- Species Hyalinia vetusta Klika, 1891 † accepted as Aegopinella vetusta (Klika, 1891) †
- Species Hyalinia villae (L. Pfeiffer, 1856) accepted as Oxychilus mortilleti (L. Pfeiffer, 1859)
- Species Hyalinia wagneri Köhler, 1912 accepted as Oxychilus perspectivus (Kobelt, 1881)
- Species Hyalinia zakynthia P. Hesse, 1882 accepted as Vitrea contracta (Westerlund, 1871)
- Genus Hyalofulgida Monterosato, 1892 accepted as Oxychilus Fitzinger, 1833
- Genus Hydatina Westerlund, 1886 accepted as Mediterranea Clessin, 1880
- Genus Iranoxychilus A. Riedel, 1998 (1)
- Genus Lindholmella C. R. Boettger, 1930 accepted as Oxychilus Fitzinger, 1833
- Genus Mediterranea Clessin, 1880 (17)
- Genus Morlina A. J. Wagner, 1914 (3)
- Genus Omalota Scudder, 1882 accepted as Oxychilus Fitzinger, 1833
- Genus Oxychilus Fitzinger, 1833 (103)
- Genus Polita Held, 1838 accepted as Oxychilus Fitzinger, 1833
- Genus Pontoxychilus A. Riedel, 1970 accepted as Conulopolita (Retowskiella) A. Riedel, 1966
- Genus Pseudopolita Germain, 1908 (1)
- Genus Riedeliconcha Schileyko, 2003 accepted as Mediterranea Clessin, 1880
- Genus Sinoxychilus M. Wu & Z.-P. Liu, 2019 (2)
- Genus Stenorhachiodon Lindholm, 1927 accepted as Schistophallus A. J. Wagner, 1914
- Genus Vitrinoxychilus A. Riedel, 1963 (3)
- Subfamily Selenochlamydinae I. M. Likharev & Wiktor, 1980 (2)
- Genus Glyphyalus H. B. Baker, 1928 (2)
- Genus Pilsbryna H. B. Baker, 1929 (6)
- Family Pristilomatidae T. D. A. Cockerell, 1891 (197)
- Family Vitreidae H. B. Baker, 1930 accepted as Pristilomatidae T. D. A. Cockerell, 1891
- Subfamily Gastrodontinae Tryon, 1866 accepted as Gastrodontidae Tryon, 1866
- Subfamily Oxychilinae Hesse, 1927 (1879) accepted as Oxychilidae Hesse, 1927 (1879)
- Superfamily Helicarionoidea Bourguignat, 1877 (1 862)
- Superfamily Limacoidea Batsch, 1789 (364)
- Superfamily Limacoidei incertae sedis (3)
- Superfamily Parmacelloidea P. Fischer, 1856 (1855)
- Superfamily Trochomorphoidea Mörch, 1864 (1 190)
- Superfamily Zonitoidea Mörch, 1864 (118)
- Family Milacidae Ellis, 1926 (55)
- Family Parmacellidae P. Fischer, 1856 (1855) (26)
- Family Trigonochlamydidae Hesse, 1882 (11)
- Infraorder Oleacinoidei (497)
- Infraorder Orthalicoidei (1 578)
- Infraorder Partuloinei accepted as Pupilloidei
- Infraorder Pupilloidei (3 436)
- Infraorder Rhytidoidei (581)
- Infraorder Sagdoinei accepted as Helicoidei
- Infraorder Succineoidei (384)
- Suborder Orthurethra accepted as Pupilloidei
- Suborder Scolodontina (165)
- Suborder Sigmurethra accepted as Helicina
- Suborder Stylommatophora incertae sedis (75)
- Order Systellommatophora (224)
- Superorder Hygrophila (2 005)
- Superorder Pneumopulmonata
- Superorder Pylopulmonata (4 285)
- Superorder Sacoglossa (391)
- Superorder Siphonarimorpha (163)
- Order Anaspidea accepted as Aplysiida
- Order Aplysiida (101)
- Order Aplysiomorpha accepted as Aplysiida
- Order Archaeopulmonata accepted as Siphonarioidea Gray, 1827
- Order Bullomorpha accepted as Cephalaspidea
- Order Cephalaspidea (1 034)
- Order Heterostropha accepted as Pyramidellidae J. E. Gray, 1840
- Order Pteropoda (414)
- Order Runcinacea accepted as Runcinida
- Order Runcinida (80)
- Order Tectibranchiata
- Order Thecosomata
- Order Umbraculida (15)
- Superorder Euthyneura incertae sedis
- Infraclass Heterobranchia incertae sedis (478)
- Infraclass Mesoneura (108)
- Infraclass Opisthobranchia
- Infraclass Pulmonata
- 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