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)
- 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)
- Superfamily Fissurelloidea J. Fleming, 1822 (716)
- Superfamily Haliotoidea Rafinesque, 1815 (94)
- Superfamily Lepetelloidea Dall, 1882 (104)
- Superfamily Lepetodriloidea J. H. McLean, 1988 (34)
- Superfamily Scissurelloidea J. E. Gray, 1847 (257)
- Family Anatomidae J. H. McLean, 1989 (99)
- Family Auritomidae J. Szabó, M. A. Conti, Monari & Wendt, 2019 † (1)
- Family Depressizonidae D. L. Geiger, 2003 (2)
- Family Larocheidae H. J. Finlay, 1927 (18)
- Family Scissurellidae J. E. Gray, 1847 (137)
- Subfamily Anatominae J. H. McLean, 1989 accepted as Anatomidae J. H. McLean, 1989
- Subfamily Larocheinae H. J. Finlay, 1927 accepted as Larocheidae H. J. Finlay, 1927
- Subfamily Scissurellinae J. E. Gray, 1847 accepted as Scissurellidae J. E. Gray, 1847
- Subfamily Sutilizoninae J. H. McLean, 1989 accepted as Sutilizonidae J. H. McLean, 1989
- Genus Ariella Bandel, 1998 accepted as Sinezona H. J. Finlay, 1926 (1)
- Genus Coronadoa Bartsch, 1946 (3)
- Genus Daizona Bandel, 1998 accepted as Sinezona H. J. Finlay, 1926
- Genus Incisura Hedley, 1904 (6)
- Genus Maxwellella Bandel, 1998 † (1)
- Genus Praescissurella Lozouet, 1998 † (4)
- Genus Reussella Bandel, 1998 † accepted as Scissurella A. d'Orbigny, 1824
- Genus Satondella Bandel, 1998 (10)
- Genus Schismope Jeffreys, 1856 accepted as Scissurella A. d'Orbigny, 1824
- Species Schismope beddomei Petterd, 1884 accepted as Sinezona beddomei (Petterd, 1884)
- Species Schismope brevis Hedley, 1904 accepted as Sinezona brevis (Hedley, 1904)
- Species Schismope caliana Dall, 1919 accepted as Tornus calianus (Dall, 1919)
- Species Schismope carinata R. B. Watson, 1886 accepted as Sukashitrochus atkinsoni (Tenison Woods, 1877)
- Species Schismope cingulata (O. G. Costa, 1861) accepted as Sinezona cingulata (O. G. Costa, 1861)
- Species Schismope columbiana Bandel, 1998 accepted as Sinezona confusa Rolán & Luque, 1994
- Species Schismope depressa R. B. Watson, 1897 accepted as Sinezona cingulata (O. G. Costa, 1861)
- Species Schismope fayalensis Dautzenberg, 1889 accepted as Sinezona cingulata (O. G. Costa, 1861)
- Species Schismope ferriezi Crosse, 1867 accepted as Sinezona ferriezi (Crosse, 1867)
- Species Schismope finlayi Laws, 1948 accepted as Sinezona finlayi (Laws, 1948) †
- Species Schismope insignis E. A. Smith, 1910 accepted as Sinezona insignis (E. A. Smith, 1910)
- Species Schismope iota H. J. Finlay, 1926 accepted as Sinezona iota (H. J. Finlay, 1926)
- Species Schismope kaiparaensis Laws, 1941 † accepted as Sukashitrochus kaiparaensis (Laws, 1941) †
- Species Schismope koruahina Laws, 1936 † accepted as Sinezona koruahina (Laws, 1936) †
- Species Schismope lacuniformis R. B. Watson, 1886 accepted as Macromphalina lacuniformis (R. B. Watson, 1886)
- Species Schismope laqueus Finlay, 1926 accepted as Sinezona laqueus (H. J. Finlay, 1926)
- Species Schismope lyallensis Finlay, 1926 accepted as Sukashitrochus lyallensis (H. J. Finlay, 1926)
- Species Schismope morleti Crosse, 1880 accepted as Sukashitrochus morleti (Crosse, 1880)
- Species Schismope mouchezi Vélain, 1877 accepted as Sinezona mouchezi (Vélain, 1877)
- Species Schismope ngatutura Laws, 1936 † accepted as Sukashitrochus ngatutura (Laws, 1936) †
- Species Schismope pacifica W. R. B. Oliver, 1915 accepted as Sinezona pacifica (W. R. B. Oliver, 1915)
- Species Schismope padangensis (Thiele, 1912) accepted as Sinezona ferriezi (Crosse, 1867)
- Species Schismope plicata Hedley, 1899 accepted as Sinezona plicata (Hedley, 1899)
- Species Schismope pulchra Petterd, 1884 accepted as Sukashitrochus pulcher (Petterd, 1884)
- Species Schismope rimuloides (P. P. Carpenter, 1865) accepted as Sinezona rimuloides (P. P. Carpenter, 1865)
- Species Schismope subantarctica Hedley, 1916 accepted as Sinezona subantarctica (Hedley, 1916)
- Species Schismope tabulata R. B. Watson, 1886 accepted as Satondella tabulata (R. B. Watson, 1886)
- Species Schismope tasmanica Petterd, 1879 accepted as Sukashitrochus atkinsoni (Tenison Woods, 1877)
- Species Schismope tertia Laws, 1940 † accepted as Sinezona tertia (Laws, 1940) †
- Genus Scissurella A. d'Orbigny, 1824 (54)
- Genus Scissurona Iredale, 1924 accepted as Incisura Hedley, 1904
- Genus Sinezona H. J. Finlay, 1926 (48)
- Genus Sukashitrochus Habe & Kosuge, 1964 (10)
- Genus Woodwardia Crosse & P. Fischer, 1861 accepted as Scissurella A. d'Orbigny, 1824
- Order Neomphalida (63)
- Order Pleurotomariida (695)
- Order Seguenziida (923)
- 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