Classification of Ladd 1972

Fm. Turritellidae Lovén 1847 [turret shell]
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G. Tenagodus Guettard 1770
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Subg. Tenagodus (Agathirses) Montfort 1808
Subg. Tenagodus (Tenagodus) Guettard 1770
G. Turritella Lamarck 1799 [turret shell]
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Subg. Turritella (Kurosioia) Ida 1952
Subg. Turritella (Torcula) Gray 1847
G. Vermicularia Lamarck 1799
Fm. Architectonicidae Gray 1850
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G. Architectonica Röding 1798 [sundial]
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G. †Climacopoma Fischer 1884
G. Heliacus d'Orbigny 1842
G. Philippia Gray 1847
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Subg. Philippia (Psilaxis) Woodring 1928
Fm. Caecidae Gray 1850
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G. Caecum Fleming 1813
G. Elephantanellum Barsch 1920
G. Fartulum Carpenter 1857
G. Micranellium Bartsch 1920
Fm. Capulidae Fleming 1822
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G. Capulus Monfort 1810
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Subg. Capulus (Krebsia) Mörch 1877
Fm. Cerithiadae Fleming 1822 [cerith snail]
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G. Ataxocerithium Tate 1893
G. Bittium Gray 1847
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Subg. Bittium (Bittiolum) Cossmann 1906
G. Clypeomorus Jousseaume 1888
G. Diala Adams 1861
G. Liocerithium Tryon 1887
G. Plesiotrochus Fischer 1878
Fm. Cerithiopsidae Adams and Adams 1853
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G. Cerithiopsis Hanley 1849
G. †Cyrbasia
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Subg. †Cyrbasia (Joculator) Hedley 1909
Invalid names: Tiarella Cossmann 1889 [synonym]
G. Seila Adams 1861
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Subg. Seila (Notoseila) Finlay 1926
Fm. Diastomidae Cossmann 1894
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G. Obtortio Hedley 1899
Fm. Epitoniidae Berry 1910 [wentletrap]
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G. Epitonium Bolten 1798
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Subg. Epitonium (Boreoscala) Kobelt 1905
Subg. Epitonium (Clathrus) Oken 1815
Subg. Epitonium (Cycloscala) Dall 1889
Subg. Epitonium (Gyroscala) de Boury 1887
Fm. Hipponicidae Troschel 1861 [hoof shell]
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G. Cheilea Modeer 1793
G. Hipponix Defrance 1819
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Subg. †Hipponix (Antisabia) Iredale 1917
Subg. Hipponix (Malluvium) Melvill 1906
Subg. Hipponix (Pilosabia) Iredale 1929
Subg. Hipponix (Sabia) Gray 1847
Fm. Littorinidae Gray 1840 [periwinkle]
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G. Littorina Ferussac 1821
Fm. Mathildidae Dall 1889
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G. Gegania Jeffreys 1884
G. Mathilda Semper 1865
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Subg. †Mathilda (Fimbriatella) Sacco 1895
Fm. Modulidae Fischer 1884
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G. Modulus Gray 1842
Fm. Potamididae Adams and Adams 1854 [horn snail]
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G. Batillaria Benson 1842
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Subg. Batillaria (Zeacumantus) Finlay 1926
G. Cerithidea Swainson 1840
G. †Potamides Brongniart 1810
G. Terebralia Swainson 1840
G. Tympanotonos Schumacher 1817
G. †Vicarya d'Archiac and Haime 1854
Fm. Scissurellidae Gray 1847
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G. Scissurella d'Orbigny 1824
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Subg. Scissurella (Anatoma) Woodward 1859
G. Sinezona Finlay 1927
Fm. Strombidae Rafinesque 1815 [true conch]
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G. Lambis Röding 1798
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Subg. Lambis (Lambis) Röding 1798
G. Strombus Linnaeus 1758 [conch]
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Subg. Strombus (Canarium) Schumacher 1817
Subg. Strombus (Conomurex) Fischer 1884
Subg. Strombus (Dolomena) Iredale 1931
Subg. Strombus (Euprotomus) Gill 1870
Subg. Strombus (Gibberulus) Jousseaume 1888
Subg. Strombus (Laevistrombus) Kira 1955
Subg. Strombus (Tricornis) Jousseaume 1886
G. Terebellum Röding 1798
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Subg. †Terebellum (Terebellum) Röding 1798
G. Tibia Röding 1798
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Subg. Tibia (Tibia) Röding 1798
G. Varicospira Eames 1952
Fm. Thiaridae Troschel 1857
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G. Melanatria Bowdich 1822
G. Melanoides Olivier 1804
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Subg. Melanoides (Melanoides) Olivier 1804
G. Thiara Röding 1798
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Subg. Thiara (Setaeara) Morrison 1951
Fm. Triphoridae Gray 1847
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G. †Cautotriphora Laws 1940
G. Triphora Blainville 1828
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Subg. †Triphora (Inella) Bayle 1878
Subg. †Triphora (Iniforis) Jousseaume 1884
Subg. †Triphora (Mastonia) Hinds 1843
Subg. Triphora (Triphora) Blainville 1828
G. Viriola Jousseaume 1884
Fm. Trochidae Rafinesque 1815 [top snail]
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G. Astele Swainson 1855
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Subg. Astele (Callistele) Cotton and Godfrey 1935
G. Basilissa Watson 1879
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Subg. †Basilissa (Ancistrobasis) Dall 1889
G. Bathybembix Crosse 1892
G. Turcica Adams 1854
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Subg. Turcica (Perrinia) Adams and Adams 1854
Fm. Turbinidae Rafinesque 1815
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G. Astraea Röding 1798
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Subg. Astraea (Bolma) Risso 1826
G. †Pareuchelus Boettger 1906
Fm. Vanikoridae Gray 1840
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G. Vanikoro Quoy and Gaimard 1832
Fm. Vermetidae Rafinesque 1815 [worm shell]
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G. †Petaloconchus Lea 1843
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Subg. Petaloconchus (Macrophragma) Carpenter 1857
G. Serpulorbis Sasso 1827
Fm. Xenophoridae Troschel 1852 [carrier shell]
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G. Tugurium Fischer 1880
G. Xenophora Fischer von Waldheim 1807
Subfm. †Rissoinae Gray 1847
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G. Schwartziella Nevill 1881
Fm. Adeorbidae Monterosato 1884
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G. Daronia Adams 1861
G. Lydiphnis Melvill
G. Munditiella Kuroda and Habe 1954
Invalid names: Tornidae Sacco 1896 [synonym]
G. Amphithalmus Carpenter 1864
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Fm. Cerithiidae Fleming 1822 [cerith snail]
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G. Cerithium Bruguière 1789
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Subg. Cerithium (Cerithium) Bruguiére 1789
Subg. Cerithium (Conocerithium) Sacco 1895
Subg. Cerithium (Thericium) Monterosato 1809
G. Colina Adams and Adams 1854
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Subg. Colina (Ischnocerithium) Thiele 1929
G. Rhinoclavis Swainson 1840
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Subg. Rhinoclavis (Proclava) Thiele 1929
Subg. Rhinoclavis (Rhinoclavis) Swainson 1840