We report findings of two exotic marine gastropods, Aplus assimilis and Mitrella psilla, in fishing ports on the Spanish Mediterranean coast from Sagunto (Valencia) to Sant Carles de la Ràpita in the Ebro Delta (Tarragona). Conchological data and the current geographical distribution maps of both species in the western Mediterranean are provided.
Key words: Mollusc, Aplus assimilis, Mitrella psilla, Exotic species, Mediterranean Sea, Spain
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