Classification of Janssen et al. 2008

G. Oxygyrus Benson 1837
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†Oxygyrus keraudrenii Lesueur 1817
G. Styliola Gray 1850
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†Styliola subula Quoy and Gaimard 1827
G. Cavolinia Avilgaard 1791
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†Cavolinia marginata Bronn 1962
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Invalid names: Cavolina limatula Beets 1943 [synonym], Cavolinia vendryesiana Ujihara 1996 [synonym], Hyala marginata Bronn 1964 [synonym]
Fm. Cavoliniidae d'Orbigny 1842
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G. Diacria Gray 1847
G. †Heliconoides Orbigny 1835
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†Heliconoides inflata Orbigny 1836
†Cavolinia grandis Bellardi 1873
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Invalid names: Cavolinia rattonei Simonelli 1896 [synonym]
Subg. †Clio (Bellardiclio) Janssen 2004
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Invalid names: Balantium braidense Bellardi 1878 [synonym], Cleodora braidense Bellardi 1905 [synonym], Clio braidense Bellardi 1897 [synonym]
Subg. †Cuvierina (Urceolarica) Janssen 2006
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Invalid names: Trypetera columnella Bronn 1862 [synonym]