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)
- 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)
- Order Anisobranchia accepted as Trochidae Rafinesque, 1815
- Order Cocculinida (69)
- Order Lepetellida (1 205)
- Order Neomphalida (63)
- Order Pleurotomariida (695)
- Order Seguenziida (923)
- Superfamily Amberleyoidea Wenz, 1938 † accepted as Eucyclidae Koken, 1896
- Superfamily Eucycloidea Koken, 1896 † (80)
- Superfamily Seguenzioidea A. E. Verrill, 1884 (843)
- Family Amberleyidae Wenz, 1938 † accepted as Eucyclidae Koken, 1896
- Family Ancistrobasidae Bandel, 2010 accepted as Fluxinellini B. A. Marshall, 1991
- Family Calliotropidae Hickman & J. H. McLean, 1990 (198)
- Family Cataegidae J. H. McLean & Quinn, 1987 (14)
- Family Chilodontaidae Wenz, 1938 (194)
- Genus Agathodonta Cossmann, 1918 † (2)
- Genus Ascetostoma D. G. Herbert, 2012 (3)
- Genus Calliovarica H. E. Vokes, 1939 † (4)
- Genus Chilodonta Etallon, 1862 (3)
- Genus Chilodontoidea Hudleston, 1896 † (1)
- Genus Clypeostoma D. G. Herbert, 2012 (10)
- Genus Craspedotus R. A. Philippi, 1847 accepted as Danilia Brusina, 1865
- Genus Danilia Brusina, 1865 (24)
- Genus Daniliopsis Vera-Peláez, 2022 † (2)
- Genus Dentistyla Dall, 1889 (3)
- Genus Euchele [sic] accepted as Euchelus R. A. Philippi, 1847
- Genus Euchelus R. A. Philippi, 1847 (22)
- Subgenus Euchelus (Herpetopoma) Pilsbry, 1890 accepted as Herpetopoma Pilsbry, 1890
- Subgenus Euchelus (Hybochelus) Pilsbry, 1890 accepted as Hybochelus Pilsbry, 1890
- Subgenus Euchelus (Nevillia) H. Adams, 1868 accepted as Nevillia H. Adams, 1868
- Subgenus Euchelus (Pareuchelus) O. Boettger, 1907 † accepted as Pareuchelus O. Boettger, 1907 †
- Subgenus Euchelus (Perrinia) H. Adams & A. Adams, 1854 accepted as Perrinia H. Adams & A. Adams, 1854
- Subgenus Euchelus (Tallorbis) G. Nevill & H. Nevill, 1869 accepted as Tallorbis G. Nevill & H. Nevill, 1869
- Species Euchelus alabastrum (Reeve, 1858) accepted as Euchelus asper (Gmelin, 1791)
- Species Euchelus alarconi Rehder, 1980
- Species Euchelus ampullus Tate, 1893 accepted as Vaceuchelus ampullus (Tate, 1893)
- Species Euchelus angulatus Pease, 1868 accepted as Vaceuchelus foveolatus (A. Adams, 1853)
- Species Euchelus annectans Tate, 1893 accepted as Herpetopoma annectans (Tate, 1893)
- Species Euchelus asper (Gmelin, 1791)
- Species Euchelus aspersus (R. A. Philippi, 1846) accepted as Herpetopoma aspersum (R. A. Philippi, 1846)
- Species Euchelus atratus (Gmelin, 1791)
- Species Euchelus barbadensis Dall, 1927
- Species Euchelus bellus F. W. Hutton, 1873 accepted as Herpetopoma bellum (F. W. Hutton, 1873)
- Species Euchelus bermudensis Moolenbeek & Faber, 1989
- Species Euchelus bicinctus auct. non R. A. Philippi, 1849 accepted as Clanculus tonnerrei (G. Nevill & H. Nevill, 1874)
- Species Euchelus bitoi Nomura & Hatai, 1940
- Species Euchelus bourcierei (Crosse, 1863) accepted as Herpetopoma instrictum (A. Gould, 1849)
- Species Euchelus cancellatus (Krauss, 1848) accepted as Hybochelus cancellatus (Krauss, 1848)
- Species Euchelus cavernosus G. B. Sowerby III, 1905 accepted as Vaceuchelus cavernosus (G. B. Sowerby III, 1905)
- Species Euchelus circulatus (R. A. Philippi, 1849)
- Species Euchelus clathratus (A. Adams, 1853) accepted as Vaceuchelus clathratus (A. Adams, 1853)
- Species Euchelus corrugatus Pease, 1861 accepted as Herpetopoma corrugatum (Pease, 1861)
- Species Euchelus dampierensis Jansen, 1994
- Species Euchelus decora Poppe & Tagaro, 2016
- Species Euchelus delpretei Caramagna, 1888 accepted as Vaceuchelus delpretei (Caramagna, 1888)
- Species Euchelus edentulus (A. Adams, 1853)
- Species Euchelus erythraeensis Sturany, 1903 accepted as Clanculus tonnerrei (G. Nevill & H. Nevill, 1874)
- Species Euchelus eucastus Dall, 1927
- Species Euchelus favosus Melvill & Standen, 1896 accepted as Vaceuchelus favosus (Melvill & Standen, 1896)
- Species Euchelus fenestrata Tate, 1893 accepted as Herpetopoma fenestratum (Tate, 1893)
- Species Euchelus fenestratus Yokoyama, 1920 †
- Species Euchelus fimbriatus Pease, 1861 accepted as Herpetopoma fimbriatum (Pease, 1861)
- Species Euchelus fischeri (Montrouzier, 1866) accepted as Herpetopoma gemmatum (A. Gould, 1845)
- Species Euchelus formosa S.-I Huang, K.-H. Jang & I.-F. Fu, 2025
- Species Euchelus fossulatus [sic] accepted as Hybochelus cancellatus (Krauss, 1848)
- Species Euchelus gemmatus (A. Gould, 1845) accepted as Herpetopoma gemmatum (A. Gould, 1845)
- Species Euchelus gemmula W. H. Turton, 1932 accepted as Vaceuchelus gemmula (W. H. Turton, 1932)
- Species Euchelus guttarosea Dall, 1889
- Species Euchelus hachijoensis Pilsbry, 1904 accepted as Herpetopoma rubrum (A. Adams, 1853)
- Species Euchelus horridus (R. A. Philippi, 1849)
- Species Euchelus hummelincki Moolenbeek & Faber, 1989
- Species Euchelus indicus A. Adams, 1855 accepted as Euchelus asper (Gmelin, 1791)
- Species Euchelus instricta [sic] accepted as Euchelus instrictus (A. Gould, 1849)
- Species Euchelus instrictus (A. Gould, 1849) accepted as Herpetopoma instrictum (A. Gould, 1849)
- Species Euchelus lamberti (Souverbie, 1875) accepted as Tallorbis roseola G. Nevill & H. Nevill, 1869
- Species Euchelus lischkei Pilsbry, 1904 accepted as Herpetopoma lischkei (Pilsbry, 1904)
- Species Euchelus maculosus Pease, 1863
- Species Euchelus midwayensis Habe & Kosuge, 1970 accepted as Danilia eucheliformis (Nomura & Hatai, 1940)
- Species Euchelus mysticus Pilsbry, 1889
- Species Euchelus natalensis E. A. Smith, 1906 accepted as Vaceuchelus natalensis (E. A. Smith, 1906)
- Species Euchelus nausicaae S.-I Huang, K.-H. Jang & I.-F. Fu, 2025
- Species Euchelus oxytropis (R. A. Philippi, 1848)
- Species Euchelus pauperculus (Lischke, 1872) accepted as Herpetopoma pauperculum (Lischke, 1872)
- Species Euchelus persicus (E. von Martens, 1874)
- Species Euchelus polysarkon Vilvens, 2017
- Species Euchelus profundior May, 1915 accepted as Vaceuchelus profundior (May, 1915)
- Species Euchelus providentiae Melvill, 1909 accepted as Ascetostoma providentiae (Melvill, 1909)
- Species Euchelus proximus A. Adams, 1855 accepted as Euchelus circulatus (R. A. Philippi, 1849)
- Species Euchelus pullatus (Anton, 1849)
- Species Euchelus pumilio Tate, 1893 accepted as Herpetopoma pumilio (Tate, 1893)
- Species Euchelus quadricarinatus (Holten, 1802) accepted as Euchelus asper (Gmelin, 1791)
- Species Euchelus ringens Schepman, 1908 accepted as Ascetostoma ringens (Schepman, 1908)
- Species Euchelus ruber (A. Adams, 1853) accepted as Herpetopoma rubrum (A. Adams, 1853)
- Species Euchelus scaber (Linnaeus, 1758)
- Species Euchelus scabriusculus A. Adams & Angas, 1867 accepted as Herpetopoma scabriusculum (A. Adams & Angas, 1867)
- Species Euchelus scrobiculatus (Souverbie, 1866) accepted as Vaceuchelus scrobiculatus (Souverbie, 1866)
- Species Euchelus seychellarum G. Nevill & H. Nevill, 1869 accepted as Herpetopoma seychellarum (G. Nevill & H. Nevill, 1869)
- Species Euchelus smithi Dunker, 1882 accepted as Monilea smithi (Dunker, 1882)
- Species Euchelus stellio (Fischer, 1878)
- Species Euchelus tasmanicus Tenison Woods, 1876 accepted as Herpetopoma scabriusculum (A. Adams & Angas, 1867)
- Species Euchelus townsendianus Melvill & Standen, 1903 accepted as Clypeostoma townsendianum (Melvill & Standen, 1903)
- Species Euchelus vixumbilicata Tate, 1893 accepted as Herpetopoma vixumbilicatum (Tate, 1893)
- Species Euchelus woodsii R. M. Johnston, 1880 † accepted as Herpetopoma woodsii (R. M. Johnston, 1880) †
- Species Euchelus xeniolum Melvill, 1918 accepted as Herpetopoma xeniolum (Melvill, 1918)
- Genus Granata Cotton, 1957 (6)
- Genus Heliciella O. G. Costa, 1861 accepted as Danilia Brusina, 1865
- Genus Herpetopoma Pilsbry, 1890 (44)
- Genus Huttonia T. W. Kirk, 1882 accepted as Herpetopoma Pilsbry, 1890
- Genus Hybochelus Pilsbry, 1890 (2)
- Genus Imbricoscelis D. G. Herbert, 2024 (1)
- Genus Mirachelus Woodring, 1928 (5)
- Genus Odontoturbo de Loriol, 1887 †
- Genus Olivia Cantraine, 1835 accepted as Danilia Brusina, 1865
- Genus Onkospira Zittel, 1873 † (1)
- Genus Perrinia H. Adams & A. Adams, 1854 (17)
- Genus Pholidotrope D. G. Herbert, 2012 (3)
- Genus Plagiochilus Kollmann, 2005 † (1)
- Genus Polystenoma Kollmann, 2005 † (2)
- Genus Putzeysia Sulliotti, 1889 (7)
- Genus Tallorbis G. Nevill & H. Nevill, 1869 (1)
- Genus Vaceuchelus Iredale, 1929 (23)
- Genus Vetulonia Dall, 1913 (7)
- Family Chilodontidae Wenz, 1938 accepted as Chilodontaidae Wenz, 1938
- Family Choristellidae Bouchet & Warén, 1979 (9)
- Family Davisianidae Egorova, 1972 accepted as Davisianinae Egorova, 1972
- Family Eudaroniidae Gründel, 2004 (7)
- Family Eunemopsidae Bandel, 2010 †
- Family Guttulidae Goryachev, 1987 accepted as Guttulinae Goryachev, 1987
- Family Lanascalidae Bandel, 1992 † (1)
- Family Laubellidae L. R. Cox, 1960 †
- Family Pendromidae Warén, 1991 (7)
- Family Pseudoturcicidae Bandel, 2010 †
- Family Sabrinellidae Bandel, 2010 †
- Family Seguenziidae A. E. Verrill, 1884 (187)
- Family Seguenzioidea incertae sedis (182)
- Family Trochaclididae Thiele, 1928 (34)
- Family Turcicidae Bandel, 2010 (10)
- Order Trochida (3 799)
- Superfamily Fissurellacea accepted as Fissurelloidea J. Fleming, 1822
- Superfamily Trochacea accepted as Trochoidea Rafinesque, 1815
- Superfamily Turbinoidea Rafinesque, 1815 accepted as Trochoidea Rafinesque, 1815
- Superfamily Vetigastropoda incertae sedis (28)
- 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