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- Mollusca (133 239)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 078)
- Class Caudofoveata (143)
- Class Cephalopoda (1 917)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 988)
- Subclass Amphigastropoda † (434)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 804)
- Subclass Gastropoda incertae sedis (313)
- Subclass Heterobranchia (39 218)
- Subclass Neomphaliones accepted as Vetigastropoda
- Subclass Neritimorpha (1 916)
- Subclass Orthogastropoda represented as Gastropoda
- Subclass Patellogastropoda (514)
- Subclass Prosobranchia
- Subclass Psilogastropoda represented as Gastropoda
- Subclass Vetigastropoda (6 789)
- Order Anisobranchia accepted as Trochidae Rafinesque, 1815
- Order Cocculinida (69)
- Order Lepetellida (1 206)
- Order Neomphalida (63)
- Order Pleurotomariida (698)
- Order Seguenziida (923)
- Order Trochida (3 802)
- Superfamily Angarioidea Gray, 1857 accepted as Trochoidea Rafinesque, 1815
- Superfamily Phasianelloidea Swainson, 1840 accepted as Trochoidea Rafinesque, 1815
- Superfamily Trochoidea Rafinesque, 1815 (3 802)
- Family Angariidae J. E. Gray, 1857 (59)
- Family Anomphalidae Wenz, 1938 † (16)
- Family Araeonematidae Nützel, 2012 † (10)
- Family Areneidae J. H. McLean, 2012 (56)
- Family Ataphridae Cossmann, 1915 † (16)
- Family Calliostomatidae Thiele, 1924 (1847) (618)
- Family Colloniidae Cossmann, 1917 (362)
- Family Conradiidae A. N. Golikov & Starobogatov, 1987 (109)
- Family Crosseolidae Hickman, 2013 accepted as Conradiidae A. N. Golikov & Starobogatov, 1987
- Family Cyclostrematidae P. Fischer, 1885 accepted as Liotiidae Gray, 1850
- Family Delphinulidae Stoliczka, 1868 accepted as Angariidae J. E. Gray, 1857
- Family Elasmonematidae Knight, 1956 † (11)
- Family Epulotrochidae Gründel, Keupp & F. Lang, 2017 † (10)
- Family Eucochlidae Bandel, 2002 † (3)
- Family Fossarinidae Bandel, 2009 accepted as Fossarininae Bandel, 2009
- Family Gazidae Hickman & J. H. McLean, 1990 accepted as Margaritidae Thiele, 1924
- Family Liotiidae Gray, 1850 (154)
- Family Liotinidae Nomura, 1932 accepted as Liotiidae Gray, 1850
- Family Margaritidae Thiele, 1924 (76)
- Genus Afrollonia Adegoke, 1977 † (2)
- Genus Anomphalogaza Hickman, 2012 (1)
- Genus Antimargarita A. W. B. Powell, 1951 (5)
- Genus Callogaza Dall, 1881 (5)
- Genus Eumargarita P. Fischer, 1885 accepted as Margarites Leach, 1847
- Genus Gaza R. B. Watson, 1879 (8)
- Genus Margarita Leach, 1819 accepted as Margarites Leach, 1847 (1)
- Subgenus Margarita (Bathymophila) Dall, 1881 accepted as Bathymophila Dall, 1881
- Subgenus Margarita (Minolia) A. Adams, 1860 accepted as Minolia A. Adams, 1860
- Subgenus Margarita (Photina) H. Adams & A. Adams, 1853 accepted as Photinula H. Adams & A. Adams, 1854
- Subgenus Margarita (Solariella) S. V. Wood, 1842 accepted as Solariella S. V. Wood, 1842
- Species Margarita (Solariella) actinophora Dall, 1890 accepted as Calliotropis actinophora (Dall, 1890)
- Species Margarita (Solariella) infundibulum (R. B. Watson, 1879) accepted as Calliotropis infundibulum (R. B. Watson, 1879)
- Species Margarita (Solariella) lacunella Dall, 1881 accepted as Solariella lacunella (Dall, 1881)
- Species Margarita (Solariella) lubrica Dall, 1881 accepted as Suavotrochus lubricus (Dall, 1881)
- Variety Margarita (Solariella) lubrica var. iridea Dall, 1889 accepted as Suavotrochus lubricus (Dall, 1881)
- Species Margarita (Solariella) reticulina Dall, 1895 accepted as Calliotropis reticulina (Dall, 1895)
- Subgenus Margarita (Turcicula) Dall, 1881 accepted as Lischkeia P. Fischer, 1879
- Species Margarita acuminata G. B. Sowerby I, 1838 accepted as Solariella varicosa (Mighels & C. B. Adams, 1842)
- Species Margarita acuminata G. B. Sowerby, 1838 sensu Mighels & C. B. Adams, 1842 accepted as Margarites vahlii (Møller, 1842)
- Species Margarita acuticostata P. P. Carpenter, 1864 accepted as Lirularia acuticostata (P. P. Carpenter, 1864)
- Species Margarita aethiopica E. von Martens, 1901 accepted as Calliotropis metallica (Wood-Mason & Alcock, 1891)
- Species Margarita alabastrum Lovén, 1846 accepted as Calliostoma occidentale (Mighels & C. B. Adams, 1842)
- Species Margarita albula A. Gould, 1861 accepted as Solariella obscura (Couthouy, 1838)
- Species Margarita aloysisabaudiae Pollonera, 1901 accepted as Margarites (Margarites) groenlandica umbilicalis (Broderip & G. B. Sowerby I, 1829)
- Species Margarita angulata A. Adams, 1853 accepted as Peasiella tantilla (A. Gould, 1849)
- Species Margarita antarctica E. Lamy, 1906 accepted as Margarella antarctica (E. Lamy, 1906)
- Species Margarita antipoda Hombron & Jacquinot, 1848 accepted as Cantharidus antipodum (Hombron & Jacquinot, 1848)
- Species Margarita arctica Leach, 1819 accepted as Margarites helicinus (Phipps, 1774)
- Species Margarita argentata A. Gould, 1841 accepted as Margarites olivaceus (T. Brown, 1827)
- Species Margarita articulata A. Gould, 1861 accepted as Pseudominolia articulata (A. Gould, 1861)
- Species Margarita aspecta A. Adams, 1855
- Species Margarita asperrima Dall, 1881 accepted as Dentistyla asperrima (Dall, 1881)
- Species Margarita balteata A. Adams, 1853
- Species Margarita bella Verkrüzen, 1875 accepted as Solariella obscura (Couthouy, 1838)
- Species Margarita biangulosa A. Adams, 1855 accepted as Pseudominolia biangulosa (A. Adams, 1855)
- Species Margarita bicarinata A. Adams & Reeve, 1850 accepted as Ilanga bicarinata (A. Adams & Reeve, 1850)
- Species Margarita brownii Cragin, 1895 †
- Species Margarita calostoma A. Adams, 1853 accepted as Margarites pupillus (A. Gould, 1849)
- Species Margarita campanulata A. S. Packard, 1867 accepted as Margarites helicinus (Phipps, 1774)
- Species Margarita carinata A. Adams, 1853
- Species Margarita carnea (R. T. Lowe, 1825) accepted as Margarites groenlandicus (Gmelin, 1791)
- Species Margarita cidaris P. P. Carpenter, 1864 accepted as Cidarina cidaris (P. P. Carpenter, 1864)
- Species Margarita cinerea (Couthouy, 1838) accepted as Margarites costalis (A. Gould, 1841)
- Species Margarita cingulata A. Adams, 1854
- Species Margarita coerulescens P. P. King, 1832 accepted as Photinula coerulescens (P. P. King, 1832)
- Species Margarita communis W. Thompson, 1844 accepted as Margarites helicinus (Phipps, 1774)
- Species Margarita costellata G. B. Sowerby I, 1838 accepted as Margarites groenlandicus (Gmelin, 1791)
- Species Margarita costulata Møller, 1842 accepted as Moelleria costulata (Møller, 1842)
- Species Margarita crassistriata Bell, 1882 † accepted as Gibbula crassistriata (Bell, 1882) †
- Species Margarita cumingii A. Adams, 1853
- Species Margarita depressa Dall, 1889 accepted as Solariella depressa (Dall, 1889)
- Species Margarita dilecta A. Adams, 1855 accepted as Antisolarium egenum (A. Gould, 1849)
- Species Margarita elegantissima S. V. Wood, 1848 accepted as Solariella varicosa (Mighels & C. B. Adams, 1842)
- Species Margarita erythrocoma Dall, 1889 accepted as Pseudostomatella erythrocoma (Dall, 1889)
- Species Margarita euspira Dall, 1881 accepted as Bathymophila euspira (Dall, 1881)
- Species Margarita expansa G. B. Sowerby I, 1838 accepted as Margarella expansa (G. B. Sowerby I, 1838)
- Species Margarita filogyra Dall, 1881 accepted as Callogaza watsoni Dall, 1881
- Species Margarita frielei A. Krause, 1885 accepted as Margarites olivaceus (T. Brown, 1827)
- Species Margarita glauca Møller, 1842 accepted as Margarites olivaceus (T. Brown, 1827)
- Species Margarita groenlandica (Gmelin, 1791) accepted as Margarites groenlandicus (Gmelin, 1791)
- Species Margarita harrisoni Hancock, 1846 accepted as Margarites olivaceus (T. Brown, 1827)
- Species Margarita helicina (Phipps, 1774) accepted as Margarites helicinus (Phipps, 1774)
- Species Margarita hypolispa (Dall, 1919) accepted as Margarites vahlii (Møller, 1842)
- Species Margarita ianthina A. Gould, 1861
- Species Margarita imperialis Dall, 1881 accepted as Lischkeia imperialis (Dall, 1881)
- Species Margarita inflata P. P. Carpenter, 1864 accepted as Margarites inflatulus Dall, 1919
- Species Margarita infundibulum (R. B. Watson, 1879) accepted as Calliotropis infundibulum (R. B. Watson, 1879)
- Species Margarita iris Dall, 1881 accepted as Solariella iris (Dall, 1881)
- Species Margarita kaigasawensis Yokoyama, 1928 † accepted as Margarites kaigasawensis (Yokoyama, 1928) †
- Species Margarita kekwickii Tenison Woods, 1877 † accepted as Spectamen kekwickii (Tenison Woods, 1877) †
- Species Margarita kophameli Strebel, 1905 accepted as Margarites kophameli (Strebel, 1905)
- Species Margarita lacazei Vélain, 1877
- Species Margarita lacunella Dall, 1881 accepted as Solariella lacunella (Dall, 1881)
- Species Margarita lamellosa A. E. Verrill & S. Smith, 1880 accepted as Lamellitrochus lamellosus (A. E. Verrill & S. Smith, 1880)
- Species Margarita lamellosa Pelseneer, 1903 accepted as Calliotropis pelseneeri Cernohorsky, 1977
- Species Margarita lautiuscula Yokoyama, 1928 † accepted as Margarites lautiuscula (Yokoyama, 1928) †
- Species Margarita lenticula A. Gould, 1861
- Species Margarita lirulata P. P. Carpenter, 1864 accepted as Lirularia lirulata (P. P. Carpenter, 1864)
- Species Margarita lissocona Dall, 1881 accepted as Calliotropis lissocona (Dall, 1881)
- Species Margarita lubrica Dall, 1881 accepted as Suavotrochus lubricus (Dall, 1881)
- Species Margarita maculata Dall, 1881 accepted as Solariella lacunella (Dall, 1881)
- Species Margarita magellanica Hombron & Jacquinot, 1848 accepted as Margarella violacea (P. P. King, 1832)
- Species Margarita magellanica A. Gould, 1852
- Species Margarita marmorea Pease, 1861 accepted as Calliotrochus marmoreus (Pease, 1861)
- Species Margarita maxima G. B. Sowerby II, 1878
- Species Margarita maxima Hombron & Jacquinot, 1848 accepted as Photinula coerulescens (P. P. King, 1832)
- Species Margarita miliaris G. Seguenza, 1876 accepted as Lissotesta turrita (Gaglini, 1987)
- Species Margarita musiva A. Gould, 1861 accepted as Conotalopia musiva (A. Gould, 1861)
- Species Margarita mustelina A. A. Gould, 1861 accepted as Conotalopia mustelina (A. A. Gould, 1861)
- Species Margarita notalis Strebel, 1908 accepted as Lissotesta notalis (Strebel, 1908)
- Species Margarita obliqua G. B. Sowerby III, 1913 accepted as Margarites helicinus (Phipps, 1774)
- Species Margarita obscura (Couthouy, 1838) accepted as Solariella obscura (Couthouy, 1838)
- Species Margarita olivacea T. Brown, 1822 accepted as Margarites olivaceus (T. Brown, 1827)
- Species Margarita ornata De Kay, 1843 accepted as Margarites ornatus (De Kay, 1843)
- Species Margarita paupercula (Dall, 1919) accepted as Solariella varicosa (Mighels & C. B. Adams, 1842)
- Species Margarita periomphalia E. von Martens, 1901 accepted as Solariella periomphalia (E. von Martens, 1901)
- Species Margarita persica A. Gould, 1852
- Species Margarita pintado A. Gould, 1861 accepted as Gibbula benzi (Krauss, 1848)
- Species Margarita polaris Danielssen, 1859 accepted as Solariella varicosa (Mighels & C. B. Adams, 1842)
- Species Margarita polytropa A. Adams, 1854
- Species Margarita ponsonbyi Preston, 1908 accepted as Calliotrochus marmoreus (Pease, 1861)
- Species Margarita pulchella Reeve, 1848
- Species Margarita pulcherrima G. B. Sowerby II, 1878
- Species Margarita pusilla Jeffreys, 1847 accepted as Dikoleps nitens (R. A. Philippi, 1844)
- Species Margarita regalis A. E. Verrill & S. Smith, 1880 accepted as Calliotropis regalis (A. E. Verrill & S. Smith, 1880)
- Species Margarita salmonea P. P. Carpenter, 1864 accepted as Margarites salmoneus (P. P. Carpenter, 1864)
- Species Margarita scabriuscula Dall, 1881 accepted as Calliotropis tiara (R. B. Watson, 1879)
- Species Margarita schantarica (Middendorff, 1849) accepted as Margarites schantaricus (Middendorff, 1849)
- Species Margarita sharpii Pilsbry, 1898 accepted as Margarites vorticiferus (Dall, 1873)
- Species Margarita sigaretina G. B. Sowerby I, 1838
- Species Margarita solariiformis G. B. Sowerby I, 1838 accepted as Isanda solariiformis (G. B. Sowerby I, 1838)
- Species Margarita sordida Hancock, 1846 accepted as Margarites sordidus (Hancock, 1846)
- Species Margarita striata Leach, 1819 accepted as Margarites groenlandicus (Gmelin, 1791)
- Species Margarita striata Broderip & G. B. Sowerby I, 1829 accepted as Margarites sordidus (Hancock, 1846)
- Species Margarita striatula (Garrett, 1857) accepted as Calliotrochus marmoreus (Pease, 1861)
- Species Margarita subantarctica Strebel, 1908 accepted as Margarella subantarctica (Strebel, 1908)
- Species Margarita sulcata G. B. Sowerby I, 1838 accepted as Margarites groenlandicus (Gmelin, 1791)
- Species Margarita tesselata [sic] accepted as Micrelenchus tessellatus (A. Adams, 1853)
- Species Margarita tessellata A. Adams, 1853 accepted as Micrelenchus tessellatus (A. Adams, 1853)
- Species Margarita tricarinata Gabb, 1873 †
- Species Margarita trochoidea S. Wood, 1848 † accepted as Margarites trochoideus (S. Wood, 1848) †
- Species Margarita umbilicalis Broderip & G. B. Sowerby I, 1829 accepted as Margarites groenlandicus umbilicalis (Broderip & G. B. Sowerby I, 1829)
- Species Margarita undulata G. B. Sowerby I, 1838 accepted as Margarites groenlandicus (Gmelin, 1791)
- Species Margarita vahlii Møller, 1842 accepted as Margarites vahlii (Møller, 1842)
- Species Margarita variabilis A. Adams, 1853
- Species Margarita varicosa Mighels & C. B. Adams, 1842 accepted as Solariella varicosa (Mighels & C. B. Adams, 1842)
- Species Margarita violacea P. P. King, 1832 accepted as Margarella violacea (P. P. King, 1832)
- Species Margarita vorticifera Dall, 1873 accepted as Margarites vorticiferus (Dall, 1873)
- Species Margarita vulgaris G. B. Sowerby I, 1838 accepted as Margarites helicinus (Phipps, 1774)
- Genus Margarites Leach, 1847 (54)
- Genus Margaritopsis Thiele, 1906 accepted as Margarites Leach, 1847
- Genus Omphalomargarites T. Habe & Ki. Ito, 1965 accepted as Margarites Leach, 1847
- Genus Pupillaria Dall, 1909 accepted as Margarites Leach, 1847
- Genus Valvatella J. E. Gray, 1857 accepted as Margarites Leach, 1847
- Family Margaritinae Stoliczka, 1868 accepted as Margaritidae Thiele, 1924
- Family Metriomphalidae Gründel, Keupp & F. Lang, 2017 † (8)
- Family Microdomatidae Wenz, 1938 † (12)
- Family Nododelphinulidae L. R. Cox, 1960 † (17)
- Family Paleophasianellidae Chaix & Plicot, 2024 † (2)
- Family Phasianellidae Swainson, 1840 (84)
- Family Proconulidae L. R. Cox, 1960 † (10)
- Family Sclarotrardidae Gründel, Keupp & F. Lang, 2017 † (1)
- Family Skeneidae W. Clark, 1851 (440)
- Family Solariellidae A. W. B. Powell, 1951 (272)
- Family Stomatellidae J. E. Gray, 1840 accepted as Stomatellinae J. E. Gray, 1840
- Family Stomatiidae P. P. Carpenter, 1861 accepted as Stomatellinae J. E. Gray, 1840
- Family Talopiidae Finlay, 1928 accepted as Umboniinae H. Adams & A. Adams, 1854 (1840)
- Family Tegulidae Kuroda, Habe & Oyama, 1971 (120)
- Family Tricoliidae Woodring, 1928 accepted as Tricoliinae Woodring, 1928
- Family Trochidae Rafinesque, 1815 (1 045)
- Family Trochoidea incertae sedis (15)
- Family Turbinidae Rafinesque, 1815 (275)
- Family Tychobraheidae Horný, 1992 † (1)
- Family Velainellidae Vasseur, 1880 †
- Subfamily Minoliinae Kuroda, T. Habe & Oyama, 1971 accepted as Solariellidae A. W. B. Powell, 1951
- Subfamily Parataphrinae Calzada, 1989 † accepted as Proconulidae L. R. Cox, 1960 †
- 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 (1 381)
- Class Polyplaxiphora accepted as Polyplacophora
- Class Rostroconchia † (64)
- Class Scaphopoda (753)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata