Between brackets is the number of accepted species
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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)
- 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)
- Subgenus Troschelviana (Cubaviana) H. B. Baker, 1922 represented as Troschelviana H. B. Baker, 1922
- Species Troschelviana (Cubaviana) pyramidalis (G. B. Sowerby II, 1842) represented as Troschelviana pyramidalis (G. B. Sowerby II, 1842)
- Species Troschelviana (Cubaviana) rubromarginata (Gundlach, 1856) represented as Troschelviana rubromarginata (Gundlach, 1856)
- Species Troschelviana (Cubaviana) scopulorum (Morelet, 1849) represented as Troschelviana scopulorum (Morelet, 1849)
- Subgenus Troschelviana (Microviana) H. B. Baker, 1928 represented as Troschelviana H. B. Baker, 1922
- Subgenus Troschelviana (Troschelviana) H. B. Baker, 1922 represented as Troschelviana H. B. Baker, 1922
- Species Troschelviana callosa (Poey, 1854)
- Species Troschelviana chrysochasma (Poey, 1853)
- Species Troschelviana continua (L. Pfeiffer, 1858)
- Species Troschelviana erythraea (G. B. Sowerby II, 1866)
- Species Troschelviana granulum (L. Pfeiffer, 1864) accepted as Lucidella granulum (L. Pfeiffer, 1864)
- Species Troschelviana hians (Poey, 1851)
- Species Troschelviana holguinensis (Aguayo, 1932)
- Species Troschelviana jugulata (Poey, 1858)
- Species Troschelviana mestrei (Arango, 1879)
- Species Troschelviana methfesseli (L. Pfeiffer, 1862)
- Species Troschelviana petitiana (A. d'Orbigny, 1842)
- Species Troschelviana pfeifferiana (L. Pfeiffer, 1866)
- Species Troschelviana pyramidalis (G. B. Sowerby II, 1842)
- Species Troschelviana rubromarginata (Gundlach, 1856)
- Species Troschelviana rupestris (L. Pfeiffer, 1839)
- Species Troschelviana scopulorum (Morelet, 1849)
- Species Troschelviana spinopoma (Aguayo, 1943)
- Species Troschelviana tumidula (Clench & Aguayo, 1957)
- 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
