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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)
Subclass Neomphaliones accepted as Vetigastropoda
Subclass Neritimorpha (1 914)
Order Cycloneritida (1 859)
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)
Subfamily Hendersoniinae H. B. Baker, 1926 (8)
Subfamily Stoastomatinae C. B. Adams, 1849 (80)
Subfamily Vianinae H. B. Baker, 1922 (147)
Genus Bakerviana Aguayo & Jaume, 1957 accepted as Calidviana H. B. Baker, 1954
Genus Calidviana H. B. Baker, 1954 (2)
Genus Callida A. J. Wagner, 1908 accepted as Calidviana H. B. Baker, 1954
Genus Calybium Morlet, 1892 (2)
Genus Eutrochatella P. Fischer, 1885 (19)
Genus Fitzia Guppy, 1895 accepted as Viana H. Adams & A. Adams, 1856
Genus Geophorus P. Fischer, 1885 (36)
Subgenus Geophorus (Agglutinans) A. J. Wagner, 1908 accepted as Geophorus P. Fischer, 1885
Subgenus Geophorus (Bothropoma) A. J. Wagner, 1908 accepted as Geophorus P. Fischer, 1885
Subgenus Geophorus (Diplopinax) Bartsch, 1918 represented as Geophorus P. Fischer, 1885
Subgenus Geophorus (Geophorus) P. Fischer, 1885 represented as Geophorus P. Fischer, 1885
Subgenus Geophorus (Schistopinax) Bartsch, 1918 represented as Geophorus P. Fischer, 1885
Species Geophorus acutissimus (G. B. Sowerby II, 1842)
Species Geophorus acutus (L. Pfeiffer, 1849)
Species Geophorus aequlibratus van Benthem Jutting, 1958
Species Geophorus agglutinans (G. B. Sowerby II, 1842)
Species Geophorus albocarinatus (Möllendorff, 1891)
Species Geophorus benguetanus Bartsch, 1918
Species Geophorus boholensis Bartsch, 1918
Species Geophorus bothropoma (Möllendorff, 1895)
Species Geophorus caramoanus Bartsch, 1918
Species Geophorus catainganus Bartsch, 1918
Species Geophorus conoidalis A. J. Wagner, 1908
Species Geophorus cumingi Bartsch, 1918
Species Geophorus cyrtopomus (Möllendorff, 1887)
Species Geophorus duponanus Bartsch, 1918
Species Geophorus exsertus (E. von Martens, 1891) accepted as Geophorus sundanus (Ancey, 1900)
Species Geophorus lazarus (G. B. Sowerby II, 1842)
Species Geophorus leytensis Bartsch, 1918
Species Geophorus mindorensis A. J. Wagner, 1908
Species Geophorus moellendorffi Bartsch, 1918
Species Geophorus monticolus A. J. Wagner, 1908 accepted as Geophorus lazarus monticolus A. J. Wagner, 1908
Species Geophorus negrosensis Bartsch, 1918
Species Geophorus nitidulus A. J. Wagner, 1908
Species Geophorus oxytropis (G. B. Sowerby I, 1839)
Species Geophorus pachychilus Bartsch, 1918
Species Geophorus palananus Bartsch, 1918
Species Geophorus peracutissimus A. J. Wagner, 1908
Species Geophorus peracutus A. J. Wagner, 1908
Species Geophorus perezi Bartsch, 1918
Species Geophorus pseudomphalus (Möllendorff, 1894)
Species Geophorus rollei (Sykes, 1901)
Species Geophorus romblonensis Bartsch, 1918
Species Geophorus siargaoensis Bartsch, 1918
Species Geophorus siquijorensis Bartsch, 1918
Species Geophorus sundanus (Ancey, 1900)
Species Geophorus tagbilleranus Bartsch, 1918
Species Geophorus tantalus Bartsch, 1918
Subspecies Geophorus tantalus mansalayensis Bartsch, 1918
Subspecies Geophorus tantalus masbatensis Bartsch, 1918
Subspecies Geophorus tantalus palawanensis Bartsch, 1918
Subspecies Geophorus tantalus tantalus Bartsch, 1918
Species Geophorus ticaoensis Bartsch, 1918
Species Geophorus transitans A. J. Wagner, 1908 accepted as Geophorus lazarus transitans A. J. Wagner, 1908
Species Geophorus trochaceus (Möllendorff, 1893) accepted as Geophorus lazarus trochaceus (Möllendorff, 1893)
Species Geophorus trochiformis (G. B. Sowerby II, 1842)
Species Geophorus trochulus A. J. Wagner, 1908 accepted as Geophorus acutissimus trochulus A. J. Wagner, 1908
Species Geophorus versicolor A. J. Wagner, 1908
Species Geophorus worcesteri Bartsch, 1918
Genus Geotrochatella P. Fischer, 1891 (6)
Genus Hapata J. E. Gray, 1856 accepted as Viana H. Adams & A. Adams, 1856
Genus Heudeia Crosse, 1885 (1)
Genus Lucidella Swainson, 1840 (44)
Genus Perenna Guppy, 1867 accepted as Lucidella (Poenia) H. Adams & A. Adams, 1856
Genus Priotrochatella H. Fischer, 1893 (5)
Genus Prosopis Weinland, 1862 accepted as Lucidella Swainson, 1840
Genus Pseudotrochatella G. Nevill, 1881 (1)
Genus Pyrgodomus Crosse & P. Fischer, 1894 (3)
Genus Rhynchocheila Shuttleworth, 1877 accepted as Viana H. Adams & A. Adams, 1856
Genus Semitrochatella Aguayo & Jaume, 1958 (5)
Genus Swiftella H. B. Baker, 1941 (1)
Genus Torreviana Aguayo, 1943 accepted as Troschelviana (Microviana) H. B. Baker, 1928
Genus Troschelviana H. B. Baker, 1922 (17)
Genus Urichia Guppy, 1895 accepted as Lucidella Swainson, 1840
Genus Ustronia A. J. Wagner, 1908 (2)
Genus Viana H. Adams & A. Adams, 1856 (3)
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 (132)
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 (44)
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