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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)
Subclass Gastropoda incertae sedis (308)
Subclass Heterobranchia (39 156)
Infraclass "Lower Heterobranchia" (1 137)
Infraclass Euthyneura (37 433)
Subterclass Acteonimorpha (411)
Subterclass Ringipleura (2 917)
Subterclass Tectipleura (34 105)
Superorder Acochlidiimorpha (48)
Superorder Ascoglossa accepted as Sacoglossa
Superorder Basommatophora accepted as Hygrophila
Superorder Eupulmonata (25 569)
Order Aillyida accepted as Achatinina
Order Ellobiida (579)
Order Gymnomorpha accepted as Systellommatophora
Order Stylommatophora (24 766)
Suborder Achatinina (2 900)
Suborder Elasmognatha accepted as Succineoidei
Suborder Helicina (21 626)
Infraorder Arionoidei (140)
Infraorder Clausilioidei (1 859)
Infraorder Helicina incertae sedis (3 210)
Infraorder Helicoidei (5 690)
Infraorder Limacoidei (4 251)
Superfamily Dyakioidea Gude & B. B. Woodward, 1921 accepted as Trochomorphoidea Mörch, 1864
Superfamily Gastrodontoidea Tryon, 1866 (621)
Superfamily Helicarionoidea Bourguignat, 1877 (1 862)
Superfamily Limacoidea Batsch, 1789 (365)
Superfamily Limacoidei incertae sedis (3)
Superfamily Parmacelloidea P. Fischer, 1856 (1855)
Superfamily Trochomorphoidea Mörch, 1864 (1 190)
Superfamily Zonitoidea Mörch, 1864 (118)
Family Archaeozonitidae Pfeffer, 1930 † (27)
Family Zonitidae Mörch, 1864 (90)
Genus Aegopis Fitzinger, 1833 (13)
Genus Allaegopis A. Riedel, 1979 (7)
Genus Anhuispira W. Yü, 1982 † (1)
Genus Balcanodiscus A. Riedel & Urbański, 1964 (9)
Genus Bellornatus W. Yü & X.-Q. Zhang, 1982 † (2)
Genus Doraegopis A. Riedel, 1982 (5)
Genus Drouetia Gude, 1911 accepted as Oxychilus (Drouetia) Gude, 1911
Genus Macrozonites Wenz, 1919 † (5)
Genus Meledella Sturany, 1908 (1)
Genus Metazonites Pfeffer, 1930 † (1)
Genus Miozonites Pfeffer, 1930 † (2)
Genus Paraegopis P. Hesse, 1910 (4)
Genus Sphaerozonites Pfeffer, 1930 † (1)
Genus Tonites auct. accepted as Zonites Montfort, 1810
Genus Tragomma Held, 1838 accepted as Zonites Montfort, 1810
Genus Troglaegopis A. Riedel & Radja, 1983 (1)
Genus Turcozonites A. Riedel, 1987 (7)
Genus Zonites Montfort, 1810 (31)
Subgenus Zonites (Aegophthalmus) P. Hesse, 1910 accepted as Zonites Montfort, 1810
Subgenus Zonites (Aegopis) Fitzinger, 1833 accepted as Aegopis Fitzinger, 1833
Subgenus Zonites (Aplostoma) Moquin-Tandon, 1855 accepted as Oxychilus Fitzinger, 1833
Subgenus Zonites (Archaegopis) Wenz, 1915 † accepted as Archaegopis Wenz, 1915 †
Subgenus Zonites (Archaeozonites) F. Sandberger, 1872 † accepted as Archaeozonites F. Sandberger, 1872 †
Species Zonites (Archaeozonites) pyramidalis Jooss, 1912 † accepted as Omphalosagda pyramidalis (Jooss, 1912) †
Species Zonites (Archaeozonites) subverticillus (F. Sandberger, 1858) † accepted as Archaeozonites subverticillus (F. Sandberger, 1858) †
Variety Zonites (Archaeozonites) subverticillus var. steinheimensis Jooss, 1912 † accepted as Miozonites steinheimensis (Jooss, 1912) †
Subgenus Zonites (Conulus) Fitzinger, 1833 accepted as Euconulus Reinhardt, 1883
Subgenus Zonites (Gastrodonta) Albers, 1850 accepted as Gastrodonta Albers, 1850
Subgenus Zonites (Grandipatula) Cossmann, 1889 † accepted as Grandipatula Cossmann, 1889 †
Subgenus Zonites (Guppya) Mörch, 1867 accepted as Guppya Mörch, 1867
Subgenus Zonites (Habroconus) Crosse & P. Fischer, 1872 accepted as Habroconus Crosse & P. Fischer, 1872
Subgenus Zonites (Hyalina) Studer, 1820 accepted as Vitrina Draparnaud, 1801
Subgenus Zonites (Hyalinia) Charpentier, 1837 accepted as Hyalinia Charpentier, 1837
Subgenus Zonites (Microphysa) E. von Martens, 1860 accepted as Hojeda H. B. Baker, 1926
Subgenus Zonites (Moreletia) J. E. Gray, 1855 accepted as Mesomphix (Moreletia) J. E. Gray, 1855
Subgenus Zonites (Nanina) J. E. Gray, 1834 accepted as Nanina J. E. Gray, 1834
Subgenus Zonites (Paraegopis) P. Hesse, 1910 accepted as Paraegopis P. Hesse, 1910
Subgenus Zonites (Poecilozonites) O. Boettger, 1884 accepted as Poecilozonites O. Boettger, 1884
Subgenus Zonites (Retinella) P. Fischer, 1877 accepted as Retinella P. Fischer, 1877
Subgenus Zonites (Turcozonites) A. Riedel, 1987 accepted as Turcozonites A. Riedel, 1987
Subgenus Zonites (Ventridens) W. G. Binney & Bland, 1869 accepted as Ventridens W. G. Binney & Bland, 1869
Subgenus Zonites (Verticillus) Moquin-Tandon, 1848 accepted as Aegopis Fitzinger, 1833
Subgenus Zonites (Videna) H. Adams & A. Adams, 1855 accepted as Videna H. Adams & A. Adams, 1855
Subgenus Zonites (Zonites) Montfort, 1810 accepted as Zonites Montfort, 1810
Species Zonites aequatus Mousson, 1854 accepted as Eopolita protensa (A. Férussac, 1832)
Species Zonites albanicus E. von Martens, 1873 accepted as Zonites kobelti O. Boettger, 1898
Species Zonites algirus (Linnaeus, 1758)
Species Zonites alliarius (J. S. Miller, 1822) accepted as Oxychilus alliarius (J. S. Miller, 1822)
Species Zonites amblyopus Mabille, 1869 accepted as Oxychilus amblyopus (Mabille, 1869)
Species Zonites anaphiensis A. Riedel & Mylonas, 1981
Species Zonites andrewsae W. G. Binney, 1879 accepted as Paravitrea andrewsae (W. G. Binney, 1879)
Species Zonites andrewsi W. G. Binney, 1879 accepted as Paravitrea andrewsae (W. G. Binney, 1879)
Species Zonites anthesi Kobelt, 1903 accepted as Zonites algirus (Linnaeus, 1758)
Species Zonites apneus Bourguignat, 1881 † accepted as Zonitoides apneus (Bourguignat, 1881) †
Species Zonites arabiae Fagot, 1884 accepted as Oxychilus alliarius (J. S. Miller, 1822)
Species Zonites arboreus (Say, 1817) accepted as Zonitoides arboreus (Say, 1817)
Species Zonites astakidae A. Riedel, 1985
Species Zonites aulacus Westerlund, 1886
Species Zonites beckerplateni Schütt, 1985 †
Species Zonites benoiti Crosse & P. Fischer, 1863 accepted as Macrochlamys benoiti (Crosse & P. Fischer, 1863)
Species Zonites beydaglariensis A. Riedel, 1982
Species Zonites boissieri (Charpentier, 1847) accepted as Sphincterochila zonata zonata (Bourguignat, 1853)
Species Zonites boisteli Depéret, 1895 †
Species Zonites bourguignatiana Mabille & Le Mesle, 1866 accepted as Microcystina bourguignatiana (Mabille & Le Mesle, 1866)
Species Zonites brittsii Pilsbry, 1892 accepted as Ventridens brittsii (Pilsbry, 1892)
Species Zonites bryodes Shuttleworth, 1854 accepted as Zonitoides arboreus (Say, 1817)
Species Zonites capnodes (W. G. Binney, 1857) accepted as Mesomphix capnodes (W. G. Binney, 1857)
Species Zonites caricus (J. R. Roth, 1839)
Species Zonites carniolicus Mousson, 1859 accepted as Aegopis croaticus (A. Férussac, 1832)
Species Zonites carolinensis T. D. A. Cockerell, 1890 accepted as Glyphyalinia carolinensis (T. D. A. Cockerell, 1890)
Species Zonites casius E. von Martens, 1889
Species Zonites catoleius Bourguignat, 1870
Species Zonites cellarius (O. F. Müller, 1774) accepted as Oxychilus cellarius (O. F. Müller, 1774)
Species Zonites cerinoidea [sic] accepted as Helix cerinoideus J. G. Anthony, 1865
Species Zonites cerinoideus (J. G. Anthony, 1865) accepted as Ventridens cerinoideus (J. G. Anthony, 1865)
Species Zonites chantrei Locard, 1878 † accepted as Oxychilus chantrei (Locard, 1878) †
Species Zonites chiron J. E. Gray, 1850 accepted as Flammulina chiron (J. E. Gray, 1850)
Species Zonites chloroticus (L. Pfeiffer, 1852)
Species Zonites cilicicus Kobelt, 1898 accepted as Turcozonites corax (L. Pfeiffer, 1857)
Species Zonites clymene Shuttleworth, 1852 accepted as Gyraulus clymene (Shuttleworth, 1852)
Species Zonites colonjoni [sic] † accepted as Macrozonites collongeoni (Michaud, 1855) †
Species Zonites coma J. E. Gray, 1843 accepted as Charopa coma (J. E. Gray, 1843)
Species Zonites compressus (Rossmässler, 1836) accepted as Aegopis compressus (Rossmässler, 1836)
Species Zonites corax (L. Pfeiffer, 1857) accepted as Turcozonites corax (L. Pfeiffer, 1857)
Species Zonites coresia J. E. Gray, 1850 accepted as Delos coresia (J. E. Gray, 1850)
Species Zonites courquini Bourguignat, 1870 accepted as Oxychilus courquini (Bourguignat, 1870)
Species Zonites cretensis L. Pfeiffer, 1877 accepted as Oxychilus superfluus (L. Pfeiffer, 1849)
Species Zonites croaticus (A. Férussac, 1832) accepted as Aegopis croaticus (A. Férussac, 1832)
Species Zonites crystallina
Species Zonites cupreus (Rafinesque, 1831) accepted as Mesomphix cupreus (Rafinesque, 1831)
Species Zonites cypricus (L. Pfeiffer, 1847) accepted as Oxychilus cyprius (L. Pfeiffer, 1847)
Species Zonites cytherae E. von Martens, 1891 accepted as Zonites algirus (Linnaeus, 1758)
Species Zonites dallianus Pilsbry, 1889 accepted as Perpolita dalliana (Pilsbry, 1889)
Species Zonites decoloratus Drouët, 1859 accepted as Tamayoa decolorata (Drouët, 1859)
Species Zonites deilus Bourguignat, 1857 accepted as Oxychilus deilus (Bourguignat, 1857)
Species Zonites desmazuresi Crosse, 1872 accepted as Orpiella desmazuresi (Crosse, 1872)
Species Zonites diegoensis Hemphill, 1892 accepted as Paralaoma servilis (Shuttleworth, 1852)
Species Zonites duboisi Mousson, 1863 accepted as Schistophallus duboisi (Mousson, 1863)
Species Zonites durandoianus Bourguignat, 1870
Species Zonites elasmodon W. G. Binney, 1885 accepted as Ventridens lasmodon (J. S. Phillips, 1841)
Species Zonites elephantium Bourguignat, 1869 † accepted as Retinella (Lyrodiscus) elephantium (Bourguignat, 1869) †
Species Zonites elliotti (Redfield, 1858) accepted as Zonitoides elliotti (Redfield, 1858)
Species Zonites embolium A. Fuchs & Käufel, 1936
Species Zonites epipedostoma Fagot, 1879 accepted as Aegopinella epipedostoma (Fagot, 1879)
Species Zonites euboeicus Kobelt, 1878
Species Zonites eurabdotus Bourguignat, 1867 accepted as Pseudopolita eurabdota (Bourguignat, 1867)
Species Zonites falsani Locard, 1878 † accepted as Oxychilus falsani (Locard, 1878) †
Species Zonites falunorum Collot, 1911 † accepted as Oxychilus falunorum (Collot, 1911) †
Species Zonites farinesianus Bourguignat, 1870 accepted as Oxychilus farinesianus (Bourguignat, 1870)
Species Zonites festae Pollonera, 1916 accepted as Zonites festai Pollonera, 1916
Species Zonites festai Pollonera, 1916
Species Zonites festinans Shuttleworth, 1852 accepted as Vermetum festinans (Shuttleworth, 1852)
Species Zonites friabilis (W. G. Binney, 1857) accepted as Mesomphix friabilis (W. G. Binney, 1857)
Species Zonites frondosulus Mousson, 1863 accepted as Oxychilus camelinus (Bourguignat, 1852)
Species Zonites fulminata F. W. Hutton, 1882 accepted as Phacussa fulminata (F. W. Hutton, 1882)
Species Zonites fulvus (O. F. Müller, 1774) accepted as Euconulus fulvus (O. F. Müller, 1774)
Species Zonites gemonensis (A. Férussac, 1832) accepted as Aegopis gemonensis (A. Férussac, 1832)
Species Zonites glaber (Rossmässler, 1835) accepted as Morlina glabra (Rossmässler, 1835)
Species Zonites goldfussi Westerlund, 1890
Species Zonites goldfussi P. Hesse, 1914 accepted as Zonites beydaglariensis A. Riedel, 1982
Species Zonites gombaulti Pallary, 1939 accepted as Turcozonites corax (L. Pfeiffer, 1857)
Species Zonites gorensis Šuklje, 1914 †
Species Zonites gorjanovici Šuklje, 1914 †
Species Zonites graecus Kobelt, 1876
Species Zonites guildingi (Bland, 1865) accepted as Happiella guildingi (Bland, 1865)
Species Zonites hamelianus Crosse, 1874
Species Zonites harlei Fagot, 1884
Species Zonites helmsii F. W. Hutton, 1882 accepted as Phacussa helmsi (F. W. Hutton, 1882)
Species Zonites herculeus Rambur, 1868
Species Zonites humeralis Pfeffer, 1930
Species Zonites humicola Mabille, 1870 accepted as Vitrea crystallina (O. F. Müller, 1774)
Species Zonites humilis A. Riedel, 1982
Species Zonites implicans Guppy, 1868 accepted as Miradiscops implicans (Guppy, 1868)
Species Zonites indentatus (Say, 1822) accepted as Glyphyalinia indentata (Say, 1822)
Species Zonites inornata (Say, 1822) accepted as Mesomphix inornatus (Say, 1822)
Species Zonites insignis Nägele, 1903 accepted as Turcozonites insignis (Nägele, 1903)
Species Zonites internus (Say, 1821) accepted as Gastrodonta interna (Say, 1821)
Species Zonites invitus A. Riedel & Mylonas, 1995
Species Zonites jaccetanicus Bourguignat, 1870 accepted as Zonitoides jaccetanicus (Bourguignat, 1870)
Species Zonites kobelti O. Boettger, 1898
Species Zonites labiosus Westerlund, 1893
Species Zonites lansingi Bland, 1875 accepted as Pristiloma lansingi (Bland, 1875)
Species Zonites lathyri Mabille, 1869 accepted as Oxychilus lathyri (Mabille, 1869)
Species Zonites latissimus Dohrn, 1882
Species Zonites lawae W. G. Binney, 1833 accepted as Ventridens lawae (W. G. Binney, 1883)
Species Zonites lawi W. G. Binney, 1883 accepted as Ventridens lawae (W. G. Binney, 1883)
Species Zonites lawleyanus Bourguignat, 1863 accepted as Monadea lawleyiana (Bourguignat, 1863)
Species Zonites lenis Shuttleworth, 1852 accepted as Retinella lenis (Shuttleworth, 1852)
Species Zonites lenopsilius A. Letourneux, 1870
Species Zonites ligerus (Say, 1821) accepted as Ventridens ligera (Say, 1821)
Species Zonites lucidus (Draparnaud, 1801) accepted as Oxychilus draparnaudi (H. Beck, 1837)
Species Zonites lucubratus (Say, 1829) accepted as Mesomphix lucubratus (Say, 1829)
Species Zonites lycicus Kobelt & Rolle, 1895 accepted as Zonites caricus (J. R. Roth, 1839)
Species Zonites maceanus Bourguignat, 1870 accepted as Oxychilus maceanus (Bourguignat, 1870)
Species Zonites macilentus Shuttleworth, 1852 accepted as Ventridens lasmodon (J. S. Phillips, 1841)
Species Zonites mauritii Westerlund, 1886 accepted as Paraegopis mauritii (Westerlund, 1886)
Species Zonites megistus Rolle, 1894 accepted as Turcozonites megistus (Rolle, 1894)
Species Zonites messenicus Zilch, 1965
Species Zonites micula Mousson, 1857 accepted as Kaliella micula (Mousson, 1857)
Species Zonites mingrelicus Mousson, 1863 accepted as Oxychilus mingrelicus (Mousson, 1863)
Species Zonites mooreana Garrett, 1884 accepted as Liardetia mooreana (Garrett, 1884)
Species Zonites nautarum A. Riedel & Mylonas, 1995
Species Zonites navarricus Bourguignat, 1870 accepted as Oxychilus navarricus (Bourguignat, 1870)
Species Zonites nikariae Pfeffer, 1930
Species Zonites nisyrius A. Riedel & Mylonas, 1997
Species Zonites nitidus (O. F. Müller, 1774) accepted as Zonitoides nitidus (O. F. Müller, 1774)
Species Zonites oertzeni E. von Martens, 1889
Species Zonites osmanicus A. Riedel, 1987
Species Zonites parnonensis A. Riedel, 1985
Species Zonites perfragilis Wetherby, 1894 accepted as Mesomphix perfragilis (Wetherby, 1894)
Species Zonites pergranulatus Kobelt, 1878
Species Zonites petrophila Bland, 1883 accepted as Paravitrea petrophila (Bland, 1883)
Species Zonites petrophilus Bland, 1883 accepted as Paravitrea petrophila (Bland, 1883)
Species Zonites pictonicus Bourguignat, 1870 accepted as Oxychilus draparnaudi (H. Beck, 1837)
Species Zonites placentula Shuttleworth, 1852 accepted as Paravitrea placentula (Shuttleworth, 1852)
Species Zonites polycrates E. von Martens, 1889 accepted as Zonites chloroticus polycrates E. von Martens, 1889
Species Zonites pseudohydatinus Bourguignat, 1856 accepted as Mediterranea hydatina (Rossmässler, 1838)
Species Zonites radiatulus (Alder, 1830) accepted as Perpolita hammonis (Strøm, 1765)
Species Zonites ramburianus Mabille & Le Mesle, 1866 accepted as Tanychlamys ramburianus (Mabille & Le Mesle, 1866)
Species Zonites rateranus Servain, 1880 accepted as Oxychilus rateranus (Servain, 1880)
Species Zonites rhodius E. von Martens, 1889
Species Zonites rollei Kobelt, 1895 accepted as Zonites caricus (J. R. Roth, 1839)
Species Zonites romani Wenz, 1919 †
Species Zonites rugeli W. G. Binney, 1879 accepted as Mesomphix rugeli (W. G. Binney, 1879)
Species Zonites santoriniensis A. Riedel & Norris, 1987
Species Zonites sarajevoensis M. Kimakowicz, 1899
Species Zonites sariae A. Riedel, 1985
Species Zonites schmeltziana Garrett, 1887 accepted as Orpiella schmeltziana (Garrett, 1887)
Species Zonites scrobiculatus Gredler, 1885 accepted as Sinoxychilus scrobiculatus (Gredler, 1885)
Species Zonites sculptilis (Bland, 1858) accepted as Glyphyalinia sculptilis (Bland, 1858)
Species Zonites secretus Bourguignat, 1881 accepted as Vitrea crystallina (O. F. Müller, 1774)
Species Zonites selenitoides Pilsbry, 1889 accepted as Discus selenitoides (Pilsbry, 1889)
Species Zonites selenkai (L. Pfeiffer, 1866) accepted as Habroconus selenkai (L. Pfeiffer, 1866)
Species Zonites septentrionalis Bourguignat, 1870 accepted as Oxychilus draparnaudi (H. Beck, 1837)
Species Zonites shepardae Hemphill, 1892 accepted as Pristiloma shepardae (Hemphill, 1892)
Species Zonites shepardi Hemphill, 1892 accepted as Pristiloma shepardae (Hemphill, 1892)
Species Zonites shimekii Pilsbry, 1890 accepted as Discus shimekii (Pilsbry, 1890)
Species Zonites simpsoni Pilsbry, 1889 accepted as Paravitrea simpsoni (Pilsbry, 1889)
Species Zonites singleyanus Pilsbry, 1889 accepted as Lucilla singleyana (Pilsbry, 1889)
Species Zonites siphnicus A. Fuchs & Käufel, 1936
Species Zonites smyrnensis (J. R. Roth, 1839)
Species Zonites somaliensis Connolly, 1931 accepted as Tayloria somaliensis (Connolly, 1931)
Species Zonites sorella Mousson, 1863 accepted as Vitrea sorella (Mousson, 1863)
Species Zonites spinellii Pollonera, 1909
Species Zonites staechadicus Bourguignat, 1877 accepted as Oxychilus draparnaudi (H. Beck, 1837)
Species Zonites stearnsii Bland, 1875 accepted as Pristiloma stearnsii (Bland, 1875)
Species Zonites sterkii (Dall, 1888) accepted as Guppya sterkii (Dall, 1888)
Species Zonites strangei L. Pfeiffer, 1849 accepted as Austrorhytida capillacea (A. Férussac, 1832)
Species Zonites subglabra Bourguignat, 1860 accepted as Oxychilus draparnaudi (H. Beck, 1837)
Species Zonites subradiatulus Fagot, 1879
Species Zonites subterraneus Bourguignat, 1856 accepted as Vitrea crystallina (O. F. Müller, 1774)
Species Zonites symius Pfeffer, 1930 accepted as Zonites rhodius symius Pfeffer, 1930
Species Zonites tehuantepecensis Crosse & P. Fischer, 1870 accepted as Zonitoides tehuantepecensis (Crosse & P. Fischer, 1870)
Species Zonites tenerrimus Brancsik, 1890 accepted as Aegopis tenerrimus (Brancsik, 1890)
Species Zonites tropidophorus Mabille, 1869 accepted as Oxychilus tropidophorus (Mabille, 1869)
Species Zonites tuxtlensis Crosse & P. Fischer, 1870 accepted as Mesomphix tuxtlensis (Crosse & P. Fischer, 1870)
Species Zonites umbratilis Guppy, 1868 accepted as Pseudohyalina umbratilis (Guppy, 1868)
Species Zonites upsoni Calkins, 1880 accepted as Vertigo ovata Say, 1822
Species Zonites uziellii Issel, 1872 accepted as Oxychilus uziellii (Issel, 1872)
Species Zonites ventrosa J. W. Taylor, 1877
Species Zonites veracruzensis Fischer & Crosse, 1872 accepted as Patulopsis salleana (E. von Martens, 1892)
Species Zonites verticillus (A. Férussac, 1819) accepted as Aegopis verticillus (A. Férussac, 1819)
Species Zonites vitiensis Mousson, 1865 accepted as Orpiella cookensis (Gude, 1905)
Species Zonites walkeri J. E. Gray, 1834 accepted as Strangesta walkeri (J. E. Gray, 1834)
Species Zonites wandae A. Riedel, 1982 accepted as Turcozonites wandae (A. Riedel, 1982)
Species Zonites westerlundi Pfeffer, 1930 accepted as Zonites goldfussi Westerlund, 1890
Species Zonites wheatleyi Bland, 1883 accepted as Glyphyalinia wheatleyi (Bland, 1883)
Subfamily Zonitinae Mörch, 1864 accepted as Zonitidae Mörch, 1864
Genus Pseudotectonica Harzhauser & Neubauer, 2020 † (1)
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