Classification of the genus Helicoplacus
G. †Helicoplacus Durham and Caster 1963
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†Helicoplacus gilberti Durham and Caster 1963
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Invalid names: Helicoplacus casteri Durham 1993 [synonym], Helicoplacus curtisi Durham and Caster 1963 [synonym], Helicoplacus everndeni Durham 1967 [synonym], Helicoplacus guthi Durham 1993 [synonym], Westgardella blancoensis Durham 1993 [synonym], Westgardella firbyi Durham 1967 [synonym]
Invalid names: Westgardella Durham 1993 [synonym]