Between brackets is the number of accepted species

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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)
- Superfamily Ellobioidea L. Pfeiffer, 1854 (1822) (579)
- Family Auriculidae A. Férussac, 1822 accepted as Ellobiidae L. Pfeiffer, 1854 (1822)
- Family Carychiidae Jeffreys, 1830 accepted as Carychiinae Jeffreys, 1830
- Family Conovulidae W. Clark, 1850 accepted as Melampodinae W. Stimpson, 1851 (1850)
- Family Ellobiidae L. Pfeiffer, 1854 (1822) (556)
- Subfamily Carychiinae Jeffreys, 1830 (146)
- Subfamily Cassidulinae Odhner, 1925 accepted as Pythiinae Odhner, 1925 (1880)
- Subfamily Ellobiinae L. Pfeiffer, 1854 (1822) (44)
- Genus Auricula Lamarck, 1799 accepted as Ellobium Röding, 1798
- Genus Auriculinella Tausch, 1886 † (1)
- Genus Auriculodes Strand, 1928 accepted as Ellobium (Auriculodes) Strand, 1928
- Genus Auriculus Montfort, 1810 accepted as Ellobium Röding, 1798
- Genus Autonoe Guppy, 1868 accepted as Ellobium (Auriculodes) Strand, 1928
- Genus Autonoella Wenz, 1947 accepted as Ellobium (Auriculodes) Strand, 1928
- Genus Blauneria Shuttleworth, 1854 (6)
- Subgenus Blauneria (Stolidoma) Deshayes, 1863 † accepted as Stolidoma Deshayes, 1863 †
- Species Blauneria acuta Briart & Cornet, 1887 † accepted as Stolidoma acuta (Briart & Cornet, 1887) †
- Species Blauneria cylindrata Briart & Cornet, 1887 † accepted as Stolidoma cylindrata (Briart & Cornet, 1887) †
- Species Blauneria elliptiformis G.-X. Zhu, 1980 †
- Species Blauneria exsilium Preston, 1912
- Species Blauneria gracilis Pease, 1860
- Species Blauneria heteroclita (Montagu, 1808)
- Species Blauneria leonardi Crosse, 1872
- Species Blauneria ovata Briart & Cornet, 1887 † accepted as Auriculastra ovata (Briart & Cornet, 1887) †
- Species Blauneria quadrasi Möllendorff, 1895
- Genus Conovulus Lamarck, 1816 accepted as Melampus Montfort, 1810
- Genus Ellobium Röding, 1798 (30)
- Genus Eoellobium Harzhauser, Pacaud & Landau, 2023 † (3)
- Genus Geovula Swainson, 1840 accepted as Ellobium Röding, 1798
- Genus Leuconia Gray, 1840 accepted as Leucophytia Winckworth, 1949
- Genus Leucopepla Peile, 1926 accepted as Leucophytia Winckworth, 1949
- Genus Leucophytia Winckworth, 1949 (4)
- Subfamily Melampinae W. Stimpson, 1851 (1850) accepted as Melampodinae W. Stimpson, 1851 (1850)
- Subfamily Melampodinae W. Stimpson, 1851 (1850) (77)
- Subfamily Pedipedinae P. Fischer & Crosse, 1880 (56)
- Subfamily Pythiinae Odhner, 1925 (1880) (138)
- Subfamily Scarabinae P. Fischer & Crosse, 1880 accepted as Pythiinae Odhner, 1925 (1880)
- Subfamily Zaptychiinae Wenz, 1938 † (19)
- Genus Apodosis Pilsbry & T. L. McGinty, 1949 accepted as Leuconopsis F. W. Hutton, 1883
- Genus Cretacopupa X.-H. Yu, 1987 † (4)
- Genus Eozaptychius X.-H. Yu, 1987 † (3)
- Genus Juramarinula Bandel, 1991 † (1)
- Genus Leopoldium Bandel & F. Riedel, 1994 † (2)
- Genus Macrodonta Deshayes, 1861 † accepted as Stolidoma Deshayes, 1863 †
- Genus Melampoides Yen, 1951 † (4)
- Genus Mesauriculstra Yen, 1952 † (2)
- Genus Mesochilina Yen, 1951 † (3)
- Genus Palaeoleuca Wenz, 1922 † (7)
- Genus Proauricula Huckriede, 1967 † (2)
- Genus Proauriculastra Bandel, 1991 † (1)
- Genus Proplecotrema O. Boettger, 1892 † accepted as Laemodonta R. A. Philippi, 1846
- Genus Pythiopsis F. Sandberger, 1870 † (17)
- Genus Rhytophorus Meek, 1871 † (5)
- Genus Semiauricula Cossmann, 1889 † (9)
- Genus Sidula Gray, 1840 accepted as Cassidula A. Férussac, 1821
- Genus Stolidoma Deshayes, 1863 † (13)
- Genus Stolidomopsis F. Sandberger, 1875 † accepted as Stolidoma (Stolidomopsis) F. Sandberger, 1875 †
- Genus Stoliodoma [sic] † accepted as Stolidoma Deshayes, 1863 †
- Genus Tortacella C. A. White, 1895 † accepted as Zaptychius Walcott, 1883 †
- Genus Tournouerella Munier-Chalmas, 1887 † (1)
- Genus Tournoueria Munier-Chalmas, 1884 † accepted as Tournouerella Munier-Chalmas, 1887 †
- Genus Traliopsis F. Sandberger, 1870 † (2)
- Family Gadiniidae Gray, 1840 accepted as Trimusculidae J. Q. Burch, 1945 (1840)
- Family Leucophytiidae Starobogatov, 1976 accepted as Ellobiinae L. Pfeiffer, 1854 (1822)
- Family Melampidae W. Stimpson, 1851 accepted as Ellobiidae L. Pfeiffer, 1854 (1822)
- Family Otinidae H. Adams & A. Adams, 1855 (7)
- Family Smeagolidae Climo, 1980 accepted as Smeagolinae Climo, 1980
- Family Trimusculidae J. Q. Burch, 1945 (1840) (16)
- Family Zospeidae Brusina, 1886 accepted as Carychiinae Jeffreys, 1830
- Superfamily Otinoidea H. Adams & A. Adams, 1855 accepted as Ellobioidea L. Pfeiffer, 1854 (1822)
- Superfamily Trimusculoidea J. Q. Burch, 1945 (1840) accepted as Ellobioidea L. Pfeiffer, 1854 (1822)
- Order Gymnomorpha accepted as Systellommatophora
- Order Stylommatophora (24 764)
- 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