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The Mercuria Boeters, 1971 species living in the coastal zones of France are reviewed. In the Atlantic zone the genus Mercuria comprises four species:

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Anatomy and morphology of Mercuria species of the Mediterranean region and Madeira were examined. Four new species of Mercuria, M. rolani n. sp., M. tingitana n. sp., M. bakeri n. sp. and M. targuasensis n. sp., are described based on conchological and anatomical evidence. An identification key and a distribution map of Mercuria of the Mediterranean region and Madeira are also provided.

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