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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)
- Order Gymnomorpha accepted as Systellommatophora
- Order Stylommatophora (24 764)
- Suborder Achatinina (2 899)
- Suborder Elasmognatha accepted as Succineoidei
- Suborder Helicina (21 625)
- Infraorder Arionoidei (140)
- Infraorder Clausilioidei (1 859)
- Infraorder Helicina incertae sedis (3 210)
- Infraorder Helicoidei (5 690)
- Superfamily Helicoidea Rafinesque, 1815 (5 491)
- Family Ariantidae Mörch, 1864 accepted as Ariantinae Mörch, 1864
- Family Bradybaenidae Pilsbry, 1934 (1898) accepted as Camaenidae Pilsbry, 1895
- Family Calyciidae Iredale, 1941 accepted as Hadrinae Iredale, 1937
- Family Camaenidae Pilsbry, 1895 (2 898)
- Subfamily Aegistinae Kuroda & Habe, 1949 accepted as Aegistini Kuroda & Habe, 1949
- Subfamily Amphidrominae Kobelt, 1902 accepted as Camaeninae Pilsbry, 1895
- Subfamily Bradybaeninae Pilsbry, 1934 (1898) (763)
- Subfamily Camaeninae Pilsbry, 1895 (600)
- Subfamily Cristovalinae Schileyko, 2003 accepted as Hadrinae Iredale, 1937
- Subfamily Hadrinae Iredale, 1937 (1 165)
- Subfamily Helicostylinae Ihering, 1909 (1890) (343)
- Genus Anixa Pilsbry, 1895 (16)
- Genus Axina Albers, 1850 accepted as Anixa Pilsbry, 1895
- Genus Callicochlias Agassiz, 1847 accepted as Cochlostyla (Calocochlea) W. Hartmann, 1843
- Genus Calocochlea W. Hartmann, 1843 (59)
- Genus Calocochlia W. Hartmann, 1840 accepted as Calocochlea W. Hartmann, 1843
- Genus Canistrum Mörch, 1852 accepted as Cochlostyla A. Férussac, 1821
- Genus Chloraea Albers, 1850 (51)
- Genus Chlorea [sic] accepted as Chloraea Albers, 1850
- Genus Chromocochlea W. Hartmann, 1842 accepted as Helicobulinus Broderip, 1841
- Genus Chrysalis auct. accepted as Chrysallis Albers, 1850
- Genus Chrysallis Albers, 1850 (15)
- Genus Cochlodryas E. von Martens, 1860 (6)
- Genus Cochlostyla A. Férussac, 1821 (5)
- Genus Coenobita Gistel, 1848 accepted as Helicobulinus Broderip, 1841
- Genus Corasia Albers, 1850 accepted as Chloraea Albers, 1850
- Genus Dolichostyla Pilsbry, 1896 (9)
- Genus Dryocochlias Möllendorff, 1898 accepted as Orthostylus H. Beck, 1837
- Genus Eudoxus Albers, 1850 accepted as Helicostyla (Eudoxus) Albers, 1850
- Genus Halocochlea Bartsch, 1932 accepted as Helicostyla (Calocochlea) W. Hartmann, 1843
- Genus Helicobulimus Möllendorff, 1890 accepted as Helicobulinus Broderip, 1841
- Genus Helicobulinus Broderip, 1841 (9)
- Genus Helicostyla A. Férussac, 1821 (97)
- Subgenus Helicostyla (Anixa) Pilsbry, 1895 accepted as Anixa Pilsbry, 1895
- Subgenus Helicostyla (Axina) Albers, 1850 accepted as Anixa Pilsbry, 1895
- Subgenus Helicostyla (Calocochlea) W. Hartmann, 1843 accepted as Calocochlea W. Hartmann, 1843
- Subgenus Helicostyla (Calocochlia) W. Hartmann, 1843 accepted as Calocochlea W. Hartmann, 1843
- Subgenus Helicostyla (Chromatosphaera) Pilsbry, 1892 accepted as Pfeifferia (Chromatosphaera) Pilsbry, 1892
- Species Helicostyla (Chromatosphaera) aurata (G. B. Sowerby I, 1841) accepted as Pfeifferia aurata (G. B. Sowerby I, 1841)
- Species Helicostyla (Chromatosphaera) erubescens (C. Semper, 1877) accepted as Pfeifferia erubescens (C. Semper, 1877)
- Species Helicostyla (Chromatosphaera) lividocincta (C. Semper, 1877) accepted as Pfeifferia lividocincta (C. Semper, 1877)
- Species Helicostyla (Chromatosphaera) luteocincta (C. Semper, 1877) accepted as Pfeifferia luteocincta (C. Semper, 1877)
- Species Helicostyla (Chromatosphaera) pudibunda (C. Semper, 1877) accepted as Pfeifferia pudibunda (C. Semper, 1877)
- Subgenus Helicostyla (Chrysallis) Albers, 1850 accepted as Chrysallis Albers, 1850
- Subgenus Helicostyla (Cochlodryas) E. von Martens, 1860 accepted as Cochlodryas E. von Martens, 1860
- Subgenus Helicostyla (Cochlostyla) A. Férussac, 1821 represented as Helicostyla A. Férussac, 1821
- Subgenus Helicostyla (Columplica) Hartmann, 1843 accepted as Pachya Albers, 1850
- Subgenus Helicostyla (Coracia) Mörch, 1865 accepted as Chloraea Albers, 1850
- Subgenus Helicostyla (Corasia) Albers, 1850 accepted as Chloraea Albers, 1850
- Subgenus Helicostyla (Crystallopsis) Ancey, 1887 accepted as Crystallopsis Ancey, 1887
- Subgenus Helicostyla (Dolichostyla) Pilsbry, 1896 accepted as Dolichostyla Pilsbry, 1896
- Subgenus Helicostyla (Dryocochlias) Möllendorff, 1898 represented as Helicostyla A. Férussac, 1821
- Subgenus Helicostyla (Eudoxus) Albers, 1850 represented as Helicostyla A. Férussac, 1821
- Subgenus Helicostyla (Helicobulimus) Mörch, 1865 accepted as Cochlostyla (Helicobulinus) Broderip, 1841
- Subgenus Helicostyla (Helicobulinus) Broderip, 1841 accepted as Helicobulinus Broderip, 1841
- Subgenus Helicostyla (Helicostyla) A. Férussac, 1821 represented as Helicostyla A. Férussac, 1821
- Subgenus Helicostyla (Hypselostyla) L. Pfeiffer, 1868 represented as Hypselostyla L. Pfeiffer, 1868
- Subgenus Helicostyla (Leytia) Pilsbry, 1892 accepted as Leytia Pilsbry, 1892
- Subgenus Helicostyla (Onistia) Mörch, 1865 accepted as Orustia Mörch, 1852
- Subgenus Helicostyla (Opalliostyla) Pilsbry, 1896 accepted as Helicostyla (Eudoxus) Albers, 1850
- Subgenus Helicostyla (Orthostylus) H. Beck, 1837 represented as Helicostyla A. Férussac, 1821
- Subgenus Helicostyla (Orustia) Mörch, 1852 accepted as Orustia Mörch, 1852
- Subgenus Helicostyla (Pachysphaera) Pilsbry, 1892 accepted as Pachysphaera Pilsbry, 1892
- Subgenus Helicostyla (Papustyla) Pilsbry, 1893 accepted as Papustyla Pilsbry, 1893
- Subgenus Helicostyla (Pfeifferia) Gray, 1853 accepted as Pfeifferia J. E. Gray, 1853
- Subgenus Helicostyla (Prochilus) E. von Martens, 1860 accepted as Dolichostyla Pilsbry, 1896
- Subgenus Helicostyla (Pythohelix) Swainson, 1840 accepted as Helicostyla A. Férussac, 1821
- Subgenus Helicostyla (Thersites) L. Pfeiffer, 1855 accepted as Thersites L. Pfeiffer, 1855
- Subgenus Helicostyla (Trachystila) [sic] accepted as Trachystyla Pilsbry, 1892
- Subgenus Helicostyla (Trachystyla) Pilsbry, 1892 accepted as Trachystyla Pilsbry, 1892
- Subgenus Helicostyla (Vidaliella) Wenz, 1940 † accepted as Vidaliella Wenz, 1940 †
- Species Helicostyla aegle (Broderip, 1841)
- Species Helicostyla albina (Grateloup, 1840)
- Species Helicostyla amagaensis de Chavez, Kendrich, Fontanilla, Batomalaque & Chiba, 2015
- Species Helicostyla amaliae (Möllendorff, 1890)
- Species Helicostyla andromache (L. Pfeiffer, 1861) accepted as Cochlostyla polillensis (L. Pfeiffer, 1861)
- Species Helicostyla aplomorpha (Jonas, 1843)
- Species Helicostyla aspersa (Grateloup, 1840) accepted as Chrysallis aspersa (Grateloup, 1840)
- Species Helicostyla augusta (Albers, 1854) accepted as Calocochlea augusta (Albers, 1854)
- Species Helicostyla barandae (Hidalgo, 1887) accepted as Helicostyla aegle (Broderip, 1841)
- Species Helicostyla batanica (Reeve, 1851) accepted as Helicostyla volubilis (Reeve, 1851)
- Species Helicostyla belcheri (L. Pfeiffer, 1853)
- Species Helicostyla bicolorata (I. Lea, 1840)
- Species Helicostyla boettgeriana (Möllendorff, 1888)
- Species Helicostyla boholensis (Broderip, 1841) accepted as Hypselostyla boholensis (Broderip, 1841)
- Species Helicostyla bullula (Broderip, 1841)
- Species Helicostyla buschi (L. Pfeiffer, 1846)
- Species Helicostyla bustoi (Hidalgo, 1887)
- Species Helicostyla butleri (L. Pfeiffer, 1842) accepted as Orthostylus butleri (L. Pfeiffer, 1842)
- Species Helicostyla caesar (L. Pfeiffer, 1855)
- Species Helicostyla calusaensis (Bartsch, 1913)
- Species Helicostyla canonizadoi (Bartsch, 1932)
- Species Helicostyla carinata (I. Lea, 1840) accepted as Hypselostyla carinata (I. Lea, 1840)
- Species Helicostyla cepoides (I. Les, 1840) accepted as Pachya cepoides (I. Lea, 1840)
- Species Helicostyla chloroleuca (E. von Martens, 1868) accepted as Helicostyla bullula (Broderip, 1841)
- Species Helicostyla chocolatina (Poppe, Tagaro & Sarino, 2015)
- Species Helicostyla chrysalidiformis (G. B. Sowerby I, 1833) accepted as Chrysallis chrysalidiformis (G. B. Sowerby I, 1833)
- Species Helicostyla cincinniformis (G. B. Sowerby I, 1841) accepted as Hypselostyla cincinniformis (G. B. Sowerby I, 1841)
- Species Helicostyla cinerosa (L. Pfeiffer, 1855)
- Species Helicostyla collodes (G. B. Sowerby I, 1841)
- Species Helicostyla corticolor (Möllendorff, 1911)
- Species Helicostyla cossmanniana (Crosse, 1886)
- Species Helicostyla cumingii (L. Pfeiffer, 1842)
- Species Helicostyla cunctator (Reeve, 1849)
- Species Helicostyla curta (G. B. Sowerby I, 1841)
- Species Helicostyla dactylus (Broderip, 1841) accepted as Hypselostyla dactylus (Broderip, 1841)
- Species Helicostyla daphnis (Broderip, 1841)
- Species Helicostyla decora (A. Adams & Reeve, 1850) accepted as Cochlodryas decora (A. Adams & Reeve, 1850)
- Species Helicostyla decorata (A. Férussac, 1821)
- Species Helicostyla delicata (Fulton, 1903)
- Species Helicostyla dilatata (L. Pfeiffer, 1846) accepted as Orustia dilatata (L. Pfeiffer, 1846)
- Species Helicostyla dimera (Jonas, 1846)
- Species Helicostyla domingoi (Bartsch, 1919)
- Species Helicostyla dubiosa (L. Pfeiffer, 1846)
- Species Helicostyla effusa (L. Pfeiffer, 1843) accepted as Helicostyla fasciata (Pilsbry, 1892)
- Species Helicostyla euconica (Bartsch, 1932)
- Species Helicostyla fasciata (Pilsbry, 1892)
- Species Helicostyla fastidiosa (Bartsch, 1932)
- Species Helicostyla faunus (Broderip, 1841)
- Species Helicostyla fenestrata (G. B. Sowerby I, 1841) accepted as Pachysphaera fenestrata (G. B. Sowerby I, 1841)
- Species Helicostyla fischeri (Hidalgo, 1890) accepted as Dolichostyla fischeri (Hidalgo, 1890)
- Species Helicostyla florida (G. B. Sowerby I, 1841) accepted as Cochlodryas florida (G. B. Sowerby I, 1841)
- Species Helicostyla frater (A. Férussac, 1821)
- Species Helicostyla fulgens (G. B. Sowerby I, 1841)
- Species Helicostyla fulgetra (Broderip, 1841)
- Species Helicostyla gigas (Hidalgo, 1901)
- Species Helicostyla gilva (L. Pfeiffer, 1845)
- Species Helicostyla glaucophthalma (L. Pfeiffer, 1853)
- Species Helicostyla globosula (Möllendorff, 1894) accepted as Chloraea globosula (Möllendorff, 1894)
- Species Helicostyla groulti (Jousseaume, 1894) accepted as Hypselostyla groulti (Jousseaume, 1894)
- Species Helicostyla hainesi (L. Pfeiffer, 1855) accepted as Cochlostyla hainesi (L. Pfeiffer, 1855)
- Species Helicostyla halichlora (O. Semper, 1866)
- Species Helicostyla hololeuca (L. Pfeiffer, 1855)
- Species Helicostyla huberorum Thach, 2021
- Species Helicostyla hydrophana (G. B. Sowerby I, 1841) accepted as Orthostylus metaformis (A. Férussac, 1821)
- Species Helicostyla ignobilis (G. B. Sowerby I, 1841) accepted as Cochlodryas ignobilis (G. B. Sowerby I, 1841)
- Species Helicostyla imperator (L. Pfeiffer, 1849)
- Species Helicostyla indusiata (L. Pfeiffer, 1871)
- Species Helicostyla intercedens (Möllendorff, 1895)
- Species Helicostyla intermedia (Quadras & Möllendorff, 1896)
- Species Helicostyla jonasi (L. Pfeiffer, 1846)
- Species Helicostyla juglans (L. Pfeiffer, 1842)
- Species Helicostyla lacerata (C. Semper)
- Species Helicostyla leai (L. Pfeiffer, 1846)
- Species Helicostyla leopardus (L. Pfeiffer, 1845)
- Species Helicostyla leucauchen (Möllendorff, 1895) accepted as Calocochlea leucauchen (Möllendorff, 1895)
- Species Helicostyla leucophaea (G. B. Sowerby I, 1841)
- Species Helicostyla leucophthalma (L. Pfeiffer, 1870) accepted as Crystallopsis leucophthalma (L. Pfeiffer, 1870)
- Species Helicostyla libata (Reeve, 1851) accepted as Calocochlea libata (Reeve, 1851)
- Species Helicostyla librosa (L. Pfeiffer, 1857)
- Species Helicostyla lignaria (L. Pfeiffer, 1842)
- Species Helicostyla macrostoma (L. Pfeiffer, 1843)
- Species Helicostyla magtanensis (C. Semper, 1877) accepted as Chloraea magtanensis (C. Semper, 1877)
- Species Helicostyla marinduquensis (Hidalgo, 1887)
- Species Helicostyla martensi (Möllendorff, 1898)
- Species Helicostyla mateoi (Bartsch, 1932) accepted as Cochlodryas mateoi (Bartsch, 1932)
- Species Helicostyla mcgintyi M. Smith, 1932 accepted as Chrysallis palliobasis (Bartsch, 1932)
- Species Helicostyla mearnsi Bartsch, 1905
- Species Helicostyla metaformis (A. Férussac, 1821) accepted as Orthostylus metaformis (A. Férussac, 1821)
- Species Helicostyla mirabilis (A. Férussac, 1821)
- Species Helicostyla modesta (G. B. Sowerby I, 1841)
- Species Helicostyla montana (C. Semper, 1877)
- Species Helicostyla mus (Delessert, 1841)
- Species Helicostyla nobilis (Reeve, 1848)
- Species Helicostyla nux (C. Semper, 1877)
- Species Helicostyla okadai Kuroda, 1932
- Species Helicostyla olanivanensis (Bartsch, 1913)
- Species Helicostyla orbitula (G. B. Sowerby I, 1841)
- Species Helicostyla oviformis (C. Semper, 1877)
- Species Helicostyla ovularis (Menke, 1828) accepted as Orthostylus metaformis (A. Férussac, 1821)
- Species Helicostyla palavanensis (L. Pfeiffer, 1857)
- Species Helicostyla paradoxa (C. Semper, 1877)
- Species Helicostyla persimilis (Deshayes, 1850)
- Species Helicostyla phaeostyla (L. Pfeiffer, 1857)
- Species Helicostyla philippinensis (L. Pfeiffer, 1846)
- Species Helicostyla pictor (Broderip, 1841)
- Species Helicostyla pilsbryi (Hidalgo, 1896)
- Species Helicostyla pithogaster (A. Férussac, 1821)
- Species Helicostyla pithogastra [sic] accepted as Helicostyla pithogaster (A. Férussac, 1821)
- Species Helicostyla polillensis (L. Pfeiffer, 1861) accepted as Cochlostyla polillensis (L. Pfeiffer, 1861)
- Species Helicostyla polita Reeve, 1848
- Species Helicostyla polychroa (G. B. Sowerby I, 1841) accepted as Cochlodryas viridostriata (I. Lea, 1840)
- Species Helicostyla portei (L. Pfeiffer, 1861)
- Species Helicostyla portii (L. Pfeiffer, 1861) accepted as Helicostyla portei (L. Pfeiffer, 1861)
- Species Helicostyla propitia (Fulton, 1907) accepted as Anixa propitia (Fulton, 1907)
- Species Helicostyla pulcherrima (G. B. Sowerby I, 1841) accepted as Calocochlea pulcherrima (G. B. Sowerby I, 1841)
- Species Helicostyla quadrasi (Hidalgo, 1886)
- Species Helicostyla quadrifasciata (Hidalgo, 1896) accepted as Cochlostyla quadrifasciata Hidalgo, 1896
- Species Helicostyla rehbeini (Reeve, 1852) accepted as Orthostylus rehbeini (Reeve, 1852)
- Species Helicostyla rufogaster (R. P. Lesson, 1832)
- Species Helicostyla rustica (Mousson, 1849) accepted as Orthostylus metaformis rusticus (Mousson, 1849)
- Species Helicostyla samarensis (Hidalgo, 1887) accepted as Calocochlea hidalgoi (Möllendorff, 1894)
- Species Helicostyla saranganica (Hidalgo, 1887)
- Species Helicostyla satyrus (Broderip, 1841)
- Species Helicostyla schadenbergi (Möllendorff, 1890)
- Species Helicostyla seckendorffiana (L. Pfeiffer, 1847)
- Species Helicostyla senckendorffiana (L. Pfeiffer, 1847) accepted as Cochlostyla seckendorffiana (L. Pfeiffer, 1847)
- Species Helicostyla simonei Thach & F. Huber, 2021
- Species Helicostyla simplex (Jonas, 1843)
- Species Helicostyla smaragdina (Reeve, 1842)
- Species Helicostyla solida (L. Pfeiffer, 1842)
- Species Helicostyla solivaga (Reeve, 1849)
- Species Helicostyla speciosa (J. C. Jay, 1836)
- Species Helicostyla sphaerica (G. B. Sowerby I, 1841) accepted as Cochlostyla sphaerica (G. B. Sowerby I, 1841)
- Species Helicostyla subcarinata (L. Pfeiffer, 1843) accepted as Hypselostyla subcarinata (L. Pfeiffer, 1843)
- Species Helicostyla submirabilis (Möllendorff, 1897) accepted as Cochlostyla submirabilis Möllendorff, 1897
- Species Helicostyla suprabadia (C. Semper, 1877) accepted as Calocochlea suprabadia (C. Semper, 1877)
- Species Helicostyla tephrodes (L. Pfeiffer, 1843)
- Species Helicostyla thomsoni (L. Pfeiffer, 1871)
- Species Helicostyla ticaonica (Broderip, 1841)
- Species Helicostyla tukanensis (L. Pfeiffer, 1871) accepted as Calocochlea tukanensis (L. Pfeiffer, 1871)
- Species Helicostyla turbinoides (Broderip, 1841) accepted as Helicobulinus turbinoides (Broderip, 1841)
- Species Helicostyla ventricosa (Bruguière, 1792)
- Species Helicostyla vidali (Hidalgo, 1887)
- Species Helicostyla villari (Hidalgo, 1887)
- Species Helicostyla virgata (J. C. Jay, 1839) accepted as Dolichostyla porracea (J. C. Jay, 1839)
- Species Helicostyla virgineus (I. Lea, 1840) accepted as Helicostyla bullula (Broderip, 1841)
- Species Helicostyla viridostriata (I. Lea, 1840) accepted as Cochlodryas viridostriata (I. Lea, 1840)
- Species Helicostyla volubilis (Reeve, 1851) accepted as Helicostyla speciosa (J. C. Jay, 1836)
- Species Helicostyla weberi (Bartsch, 1919)
- Species Helicostyla woodiana (I. Lea, 1840)
- Species Helicostyla worcesteri (Bartsch, 1909)
- Genus Hypoptychus Pilsbry, 1893 accepted as Pachya Albers, 1850
- Genus Hypselostyla L. Pfeiffer, 1868 (25)
- Genus Hypselostylus [sic] accepted as Hypselostyla L. Pfeiffer, 1868
- Genus Leytia Pilsbry, 1892 (1)
- Genus Mesanella Clench & R. D. Turner, 1952 (4)
- Genus Orthostylus H. Beck, 1837 (6)
- Genus Orustia Mörch, 1852 (4)
- Genus Pachya Albers, 1850 (1)
- Genus Pachysphaera Pilsbry, 1892 (6)
- Genus Pfeifferia J. E. Gray, 1853 (7)
- Genus Phania E. von Martens, 1860 accepted as Pyrochilus Pilsbry, 1893
- Genus Phengus Albers, 1850 (2)
- Genus Phoenicobius Mörch, 1852 (12)
- Genus Poecilus Albers, 1860 accepted as Cochlostyla (Cochlodryas) E. von Martens, 1860
- Genus Prochilus E. von Martens, 1860 accepted as Dolichostyla Pilsbry, 1896
- Genus Ptychostylus Möllendorff, 1888 accepted as Pachya Albers, 1850
- Genus Pyrochilus Pilsbry, 1893 (7)
- Genus Pythohelix Swainson, 1840 accepted as Helicostyla A. Férussac, 1821
- Genus Rhymbocochlias Möllendorff, 1895 accepted as Helicobulinus Broderip, 1841
- Genus Steatodryas Pilsbry, 1932 accepted as Pachya Albers, 1850
- Genus Trachystyla Pilsbry, 1892 (1)
- Subfamily Papuininae Iredale, 1938 accepted as Hadrinae Iredale, 1937
- Subfamily Pfeifferiinae Gray, 1855 accepted as Helicostylinae Ihering, 1909 (1890)
- Subfamily Sinumeloninae Solem, 1992 accepted as Hadrinae Iredale, 1937
- Subfamily Xanthomelontinae Iredale, 1937 accepted as Hadrinae Iredale, 1937
- Genus Amphicoelina F. Haas, 1933 accepted as Amphicoelina Zilch, 1960
- Genus Archaeoxesta Kobelt, 1909 † (1)
- Genus Geotrochus Swainson, 1840 accepted as Helix (Papuina) E. von Martens, 1860
- Genus Gracillinoconcha W. Yü & X.-Q. Zhang, 1982 † (1)
- Genus Hodopoeus Pilsbry & T. D. A. Cockerell, 1945 † (2)
- Genus Iforasia J.-C. Fischer, 1963 † (1)
- Genus Indocamaena Thach, 2023 (2)
- Genus Kanabohelix Pilsbry, 1927 † (1)
- Genus Kenyirus Clements & Tan, 2012 (3)
- Genus Limonohelix W. Yü & X.-Q. Zhang, 1982 † (3)
- Genus Miocenehadra T. Habe & Itoigawa, 1976 † (2)
- Genus Multiscapta W. Yü, 1982 † (3)
- Genus Ogeramua Christensen, 2017 (2)
- Genus Papuanella Clench & R. D. Turner, 1959 accepted as Ogeramua Christensen, 2017
- Genus Philbouchetia Thach, 2020 (1)
- Genus Planodoma W. Yü & H.-Z. Pan, 1982 † (1)
- Genus Sanshuispira W. Yü & X.-Q. Zhang, 1982 † (3)
- Genus Sinocamaena M. Wu, 2024 (1)
- Family Canariellidae Schileyko, 1991 (56)
- Family Cepolidae Ihering, 1909 (102)
- Family Chloritidae Iredale, 1938 accepted as Hadrinae Iredale, 1937
- Family Cochlicellidae Schileyko, 1972 accepted as Cochlicellini Schileyko, 1972
- Family Cochlicellinae Schileyko, 1972 accepted as Cochlicellini Schileyko, 1972
- Family Cochlostylidae Möllendorff, 1890 accepted as Helicostylinae Ihering, 1909 (1890)
- Family Echinichidae F. G. Thompson & Naranjo-García, 2012 accepted as Echinichinae F. G. Thompson & Naranjo-García, 2012
- Family Elonidae E. Gittenberger, 1977 (63)
- Family Epiphragmophoridae Hoffmann, 1928 (72)
- Family Eulotidae Möllendorff, 1898 accepted as Bradybaenini Pilsbry, 1934 (1898)
- Family Geomitridae C. R. Boettger, 1909 (402)
- Family Helicellidae Ihering, 1909 accepted as Hygromiidae Tryon, 1866
- Family Helicidae Rafinesque, 1815 (500)
- Family Helicodontidae Kobelt, 1904 (26)
- Family Helminthoglyptidae Pilsbry, 1939 accepted as Helminthoglyptinae Pilsbry, 1939
- Family Humboldtianidae Pilsbry, 1939 accepted as Humboldtianinae Pilsbry, 1939
- Family Hygromiidae Tryon, 1866 (460)
- Family Jacostidae Pilsbry, 1948 accepted as Helicellini Ihering, 1909
- Family Labyrinthidae Borrero, Sei, D. G. Robinson & Rosenberg, 2017 (58)
- Family Lampadiidae Winckworth, 1945 accepted as Labyrinthidae Borrero, Sei, D. G. Robinson & Rosenberg, 2017
- Family Leucochroidae Westerlund, 1886 accepted as Sphincterochilinae Zilch, 1960 (1886)
- Family Lysinoidae Hoffmann, 1928 accepted as Lysinoinae Hoffmann, 1928
- Family Monadeniidae H. Nordsieck, 1987 accepted as Monadeniinae H. Nordsieck, 1987
- Family Papuinidae Iredale, 1938 accepted as Hadrinae Iredale, 1937
- Family Pentataeniidae Mörch, 1864 accepted as Helicini Rafinesque, 1815
- Family Planispiridae Iredale, 1941 accepted as Hadrinae Iredale, 1937
- Family Pleurodontidae Ihering, 1912 (57)
- Family Polygyridae Pilsbry, 1895 (311)
- Family Rhagadidae Iredale, 1938 accepted as Hadrinae Iredale, 1937
- Family Sphincterochilidae Zilch, 1960 (1886) (41)
- Family Thysanophoridae Pilsbry, 1926 (42)
- Family Trichodiscinidae H. Nordsieck, 1987 (11)
- Family Trissexodontidae H. Nordsieck, 1987 (46)
- Family Xanthonychidae Strebel & Pfeffer, 1880 (345)
- Tribe Canariellini Schileyko, 1991 accepted as Canariellidae Schileyko, 1991
- Genus Laxecostula Harzhauser & Neubauer, 2020 † (1)
- Superfamily Sagdoidea Pilsbry, 1895 (199)
- Infraorder Limacoidei (4 250)
- Infraorder Oleacinoidei (497)
- Infraorder Orthalicoidei (1 578)
- Infraorder Partuloinei accepted as Pupilloidei
- Infraorder Pupilloidei (3 436)
- Infraorder Rhytidoidei (581)
- Infraorder Sagdoinei accepted as Helicoidei
- Infraorder Succineoidei (384)
- Suborder Orthurethra accepted as Pupilloidei
- Suborder Scolodontina (165)
- Suborder Sigmurethra accepted as Helicina
- Suborder Stylommatophora incertae sedis (75)
- 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
