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Rival at the gate: first record of the Asian clam Corbicula fluminea Müller, 1774 (Bivalvia: Corbiculidae) in Greece

This contribution presents the first record of the Asian clam Corbicula fluminea Müller, 1774 in Greece. The species was collected in Erythropotamos River (Reka Luda Луда река), one of the main tributaries of Evros River (classical name of the Maritsa river), thus being the southernmost record of this invasive bivalve in the Balkan Peninsula. The most likely entry source of C. fluminea in Greece is through active or passive downstream drift through the Bulgarian part of Erythropotamos River, which is shared between Bulgaria and Greece. Special attention is now required to assess the invasion extent of the Asian clam in the entire Evros basin and adjacent river basins of Bulgaria and the Aegean basins of Greece and Turkey.