Classification of the genus Costoanachis
Subg. †Anachis (Costoanachis) Sacco 1890
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†Anachis (Costoanachis) mira Dall 1896
†Anachis (Costoanachis) mira fugax Brown and Pilsbry 1911
†Anachis (Costoanachis) stevensoni Marks 1951
†Anachis (Costoanachis) stibara Woodring 1964
Anachis (Costoanachis) translirata Ravenel 1861
Anachis (Costoanachis) varicosa Gaskoin 1852
Costoanachis avara Say 1822
†Costoanachis divilitus Harris and Maury 1917
†Costoanachis exilis Gabb 1873
†Costoanachis haitensis Sowerby 1850
Costoanachis semiplicata Stearns 1873