Many freshwater gastropodes are involved in the life cycle of parasitic flukes. Some of these are important in public heath and veterinary medicine. A comprehensive snail search was undertaken throughout provinces in Iran. In the first step, freshwater bodies of Khuzestan, were searched for potential intermediate host snails. Fifteen taxa, namely 8 prosobranch snails and 7 pulmonate snails were collected during the 1990s. Neritina mesopotamica Martens 1879 was found to be new species for Khuzestan.
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