Between brackets is the number of accepted species

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- Mollusca (132 851)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 013)
- Class Caudofoveata (143)
- Class Cephalopoda (1 834)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 753)
- Subclass Amphigastropoda † (396)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 670)
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 172)
- Infraclass "Lower Heterobranchia" (1 137)
- Infraclass Euthyneura (37 449)
- Subterclass Acteonimorpha (411)
- Subterclass Ringipleura (2 917)
- Subterclass Tectipleura (34 121)
- Superorder Acochlidiimorpha (48)
- Superorder Ascoglossa accepted as Sacoglossa
- Superorder Basommatophora accepted as Hygrophila
- Superorder Eupulmonata (25 585)
- Order Aillyida accepted as Achatinina
- Order Ellobiida (579)
- Order Gymnomorpha accepted as Systellommatophora
- Order Stylommatophora (24 782)
- Order Systellommatophora (224)
- Superfamily Onchidioidea Rafinesque, 1815 (69)
- Superfamily Veronicelloidea J. E. Gray, 1840 (154)
- Family Rathouisiidae Heude, 1885 (23)
- Family Vaginulidae E. von Martens, 1866 accepted as Veronicellidae J. E. Gray, 1840
- Family Veronicellidae J. E. Gray, 1840 (131)
- Subfamily Imeriinae Hoffmann, 1928 accepted as Veronicellidae J. E. Gray, 1840
- Subfamily Meisenheimeriinae Hoffmann, 1925 accepted as Veronicellidae J. E. Gray, 1840
- Subfamily Pseudoveronicellinae Hoffmann, 1928 accepted as Veronicellidae J. E. Gray, 1840
- Subfamily Sarasinulinae Hoffmann, 1925 accepted as Veronicellidae J. E. Gray, 1840
- Subfamily Semperulinae Hoffmann, 1925 accepted as Veronicellidae J. E. Gray, 1840
- Genus Angustipes Colosi, 1922 (7)
- Genus Annulicaulis Simroth, 1913 accepted as Laevicaulis Simroth, 1913
- Genus Belocaulus Hoffmann, 1925 (3)
- Genus Colosius Thomé, 1975 (6)
- Genus Curticaulis Simroth, 1913 accepted as Desmocaulis Simroth, 1913
- Genus Cycloprocta Simroth, 1913 accepted as Pseudoveronicella Germain, 1908
- Genus Cylindrocaulides Strand, 1928 accepted as Leidyula H. B. Baker, 1925
- Genus Cylindrocaulus Hoffmann, 1925 accepted as Leidyula H. B. Baker, 1925
- Genus Desmocaulis Simroth, 1913 (1)
- Genus Diploselenodes [sic] accepted as Diplosolenodes Thomé, 1975
- Genus Diplosolenodes Thomé, 1975 (6)
- Genus Drepanocaulis Simroth, 1913 accepted as Filicaulis Simroth, 1913
- Genus Drepanoprocta Simroth, 1913 accepted as Pseudoveronicella Germain, 1908
- Genus Eleutherocaulis Simroth, 1913 accepted as Laevicaulis Simroth, 1913
- Genus Filicaulis Simroth, 1913 (9)
- Genus Forcartulus Thomé, 1975 (1)
- Genus Heterovaginina O. Kraus, 1953 (2)
- Genus Hoffmannia Forcart, 1953 accepted as Pseudoveronicella (Afroveronicella) Forcart, 1954
- Genus Imerinia T. D. A. Cockerell, 1891 (11)
- Genus Laevicaulis Simroth, 1913 (9)
- Genus Latipes Colosi, 1922 (11)
- Genus Leidyula H. B. Baker, 1925 (8)
- Genus Leonardia Tapparone Canefri, 1889
- Genus Meisenheimeria Grimpe & Hoffmann, 1924 accepted as Laevicaulis Simroth, 1913
- Genus Microveronicella Thomé, 1975 (1)
- Genus Monocaulis Colosi, 1922 accepted as Latipes Colosi, 1922
- Genus Montivaginulus Thomé, 1975 (1)
- Genus Novovaginula Thiele, 1931 (3)
- Genus Phyllocaulis Colosi, 1922 (6)
- Genus Phyllocaulus Hoffmann, 1925 accepted as Phyllocaulis Colosi, 1922
- Genus Pleuroprocta Simroth, 1913 accepted as Pseudoveronicella Germain, 1908
- Genus Potamojanuarius Thomé, 1975 (2)
- Genus Prismatocaulis Simroth, 1913 accepted as Filicaulis Simroth, 1913
- Genus Pseudoveronicella Germain, 1908 (12)
- Genus Rhopalocaulis Simroth, 1913 accepted as Imerinia T. D. A. Cockerell, 1891
- Genus Sarasinula Grimpe & Hoffmann, 1924 (5)
- Genus Semperula Grimpe & Hoffmann, 1924 (8)
- Genus Simrothula Thomé, 1975 (3)
- Genus Spirocaulis Simroth, 1913 accepted as Filicaulis (Flagellicaulis) Simroth, 1913
- Genus Tenacipes H. B. Baker, 1931 accepted as Veronicella Blainville, 1817
- Genus Vaginina Simroth, 1897
- Genus Vaginina Simroth, 1913 accepted as Pseudoveronicella (Vaginina) Simroth, 1913
- Genus Vaginula auct. accepted as Vaginulus A. Férussac, 1821 (1)
- Genus Vaginulopsis Simroth, 1912
- Genus Vaginulus A. Férussac, 1821 (3)
- Genus Valiguna Grimpe & Hoffmann, 1925 (4)
- Species Valiguna crispa Mitchueachart & Panha, 2024
- Species Valiguna flava (Heynemann, 1885)
- Species Valiguna isseli Hoffmann, 1941 accepted as Valiguna flava (Heynemann, 1885)
- Species Valiguna semicerina Mitchueachart & Panha, 2024
- Species Valiguna siamensis (E. von Martens, 1867)
- Genus Veronicella Blainville, 1817 (6)
- Genus Zilchulus Thomé, 1975 (2)
- Genus Granulilimax Minato, 1989 (1)
- 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