Classification of the genus Helicaulax
G. †Helicaulax Gabb 1868
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†Anchura (Helicaulax) condoniana Anderson 1902
†Anchura (Helicaulax) popenoei Elder and Saul 1996
†Anchura (Helicaulax) tricosa Saul and Popenoe 1993
†Helicaulax bicarinata Deshayes in Leymerie 1842
†Helicaulax bicarinata Gabb 1869
†Helicaulax falcata Böhm 1891
†Helicaulax latealata Riedel 1933