Classification of Brown and Pilsbry 1913
G. Drillia Gray 1838
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Drillia harfordiana Reeve 1843
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Drillia harfordiana colonensis Brown and Pilsbry 1913
Drillia harfordiana flucki Brown and Pilsbry 1913
G. Phacoides Blainville 1825
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Phacoides antillarum Reeve 1850
Phacoides leucocyma Dall 1886
G. Leda Schumacher 1817
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G. Congeria
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Subg. Thracia (Cyathodonta) Conrad 1849
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†Thracia (Cyathodonta) gatunensis Toula 1909