Between brackets is the number of accepted species
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- Mollusca (132 927)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 030)
- Class Caudofoveata (143)
- Class Cephalopoda (1 845)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 801)
- Subclass Amphigastropoda † (404)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 703)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 920)
- Superfamily Ampullarioidea Gray, 1824 (250)
- Superfamily Cyclophoroidea J. E. Gray, 1847 (3 906)
- Family Aciculidae J. E. Gray, 1850 (104)
- Family Acmeidae Pollonera, 1905 accepted as Aciculidae J. E. Gray, 1850
- Family Alycaeidae W. T. Blanford, 1864 accepted as Alycaeinae W. T. Blanford, 1864
- Family Bolaniidae Wenz, 1915 accepted as Craspedopomatidae Kobelt & Möllendorff, 1898
- Family Cochlostomatidae Kobelt, 1902 (118)
- Family Craspedopomatidae Kobelt & Möllendorff, 1898 (21)
- Family Cyclophoridae J. E. Gray, 1847 (1 604)
- Family Cytoridae Climo, 1969 accepted as Liareinae A. W. B. Powell, 1946
- Family Dicristidae A. N. Golikov & Starobogatov, 1975 accepted as Neocyclotidae Kobelt & Möllendorff, 1897
- Family Diplommatinidae L. Pfeiffer, 1856 (1 026)
- Family Ferussinidae Wenz, 1923 (1915) † accepted as Ferussininae Wenz, 1923 (1915) †
- Family Hainesiidae Thiele, 1929 (220)
- Family Lagocheilidae Stoliczka, 1872 accepted as Cyclophoridae J. E. Gray, 1847
- Family Maizaniidae Tielecke, 1940 (40)
- Family Megalomastomatidae W. T. Blanford, 1864 (100)
- Subfamily Cochlostomatinae Kobelt, 1902 accepted as Cochlostomatidae Kobelt, 1902
- Subfamily Megalomastomatinae W. T. Blanford, 1864 accepted as Megalomastomatidae W. T. Blanford, 1864
- Subfamily Megalostomatinae [sic] accepted as Megalomastomatinae W. T. Blanford, 1864
- Subfamily Neopupininae Kobelt, 1902 accepted as Megalomastomatinae W. T. Blanford, 1864
- Genus Ajkaia Tausch, 1886 † (2)
- Genus Aperostoma Troschel, 1847 (47)
- Genus Cyclohidalgoa Bartsch, 1942 accepted as Aperostoma (Cyclohidalgoa) Bartsch, 1942
- Genus Cyclopoma Troschel, 1847 accepted as Cyclopomops Bartsch & J. P. E. Morrison, 1942
- Genus Cyclopomops Bartsch & J. P. E. Morrison, 1942 (1)
- Genus Cyrtotoma Mörch, 1852 accepted as Aperostoma Troschel, 1847
- Genus Farcimen Troschel, 1847 (33)
- Subgenus Farcimen (Farcimen) Troschel, 1847
- Subgenus Farcimen (Jaumeoconcha) Alcalde, 1945 represented as Farcimen Troschel, 1847
- Subgenus Farcimen (Neopupina) Kobelt, 1902 accepted as Neopupina Kobelt, 1902
- Species Farcimen alutaceum (L. Pfeiffer, 1846)
- Subspecies Farcimen alutaceum alutaceum (L. Pfeiffer, 1846)
- Subspecies Farcimen alutaceum digitale (L. Pfeiffer, 1857)
- Subspecies Farcimen alutaceum fuentesi Alcalde, 1945
- Subspecies Farcimen alutaceum magnificum C. de la Torre & Bartsch, 1942
- Subspecies Farcimen alutaceum magnum Alcalde, 1945
- Species Farcimen apertum (Poey, 1851) accepted as Farcimen tortum (W. Wood, 1828)
- Species Farcimen arangoi C. de la Torre & Bartsch, 1942
- Species Farcimen auriculatum (A. d'Orbigny, 1842)
- Species Farcimen bartschi Alcalde, 1945
- Species Farcimen bilabiatum Alcalde, 1945
- Species Farcimen bituberculatum (G. B. Sowerby I, 1850)
- Species Farcimen camagueyanum C. de la Torre & Bartsch, 1942
- Species Farcimen cisnerosi Alcalde, 1945
- Species Farcimen guanense C. de la Torre & Bartsch, 1942
- Species Farcimen guitarti C. de la Torre & Bartsch, 1942
- Species Farcimen gundlachi (L. Pfeiffer, 1856)
- Species Farcimen hendersoni C. de la Torre & Bartsch, 1942
- Species Farcimen imperator Alcalde, 1945
- Species Farcimen jaumei Alcalde, 1945
- Species Farcimen leoninum (L. Pfeiffer, 1856)
- Species Farcimen magister C. de la Torre & Bartsch, 1942
- Species Farcimen majusculum Alcalde, 1945
- Species Farcimen mani (Poey, 1851)
- Species Farcimen najazaense C. de la Torre & Bartsch, 1942
- Species Farcimen obesum C. de la Torre & Bartsch, 1942
- Species Farcimen procer (Poey, 1854)
- Species Farcimen pseudotortum C. de la Torre & Bartsch, 1942
- Species Farcimen rocai C. de la Torre & Bartsch, 1942
- Species Farcimen seminudum (Poey, 1854)
- Species Farcimen subventricosum C. de la Torre & Bartsch, 1942
- Species Farcimen superbum C. de la Torre & Bartsch, 1942
- Species Farcimen torrei (Guitart, 1936)
- Species Farcimen tortum (W. Wood, 1828)
- Species Farcimen ungula (Poey, 1858)
- Species Farcimen ventricosum (A. d'Orbigny, 1842)
- Species Farcimen vignalense [sic] accepted as Farcimen vinalense C. de la Torre & Bartsch, 1942
- Species Farcimen vinalense C. de la Torre & Bartsch, 1942
- Species Farcimen wrighti C. de la Torre & Bartsch, 1942
- Species Farcimen yunquense C. de la Torre & Bartsch, 1942
- Genus Farcimoides Bartsch, 1942 (3)
- Genus Habropoma Crosse & P. Fischer, 1880 accepted as Aperostoma Troschel, 1847
- Genus Lomastoma S. P. Woodward, 1856 accepted as Megalomastoma Swainson, 1840
- Genus Megaloma S. P. Woodward, 1854 accepted as Megalomastoma Swainson, 1840
- Genus Megalomastoma Swainson, 1840 (6)
- Genus Megalostoma accepted as Megalomastoma Swainson, 1840
- Genus Neopupina Kobelt, 1902 (3)
- Genus Tomocyclus Crosse & P. Fischer, 1872 (5)
- Family Megalostomatidae [sic] accepted as Megalomastomatidae W. T. Blanford, 1864
- Family Neocyclotidae Kobelt & Möllendorff, 1897 (242)
- Family Pollicariidae Thiele, 1929 (6)
- Family Pupinidae L. Pfeiffer, 1853 (422)
- Family Strophostomatidae Wenz, 1915 † accepted as Ferussininae Wenz, 1923 (1915) †
- Genus Carinomphalus W. Yü, 1974 † (1)
- Genus Diplommoptychia Maillard, 1884 †
- Genus Loriolina Huckriede, 1967 † (1)
- Genus Maillardinus Bandel, 1991 † (1)
- Superfamily Viviparoidea Gray, 1847 (764)
- Order Caenogastropoda incertae sedis (7 677)
- Order Littorinimorpha (17 189)
- Order Neogastropoda (23 770)
- Order Stenoglossa accepted as Neogastropoda
- Subclass Gastropoda incertae sedis (309)
- Subclass Heterobranchia (39 177)
- 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 (6 783)
- 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
