Prima segnalazione dell’associazione di Mytilopsis leucophaeata (Conrad, 1831) (Bivalvia: Dreissenidae) e Ficopomatus enigmaticus (Fauvel, 1923) (Polychaeta: Serpulidae) per l’Italia

[First report of the association of Mytilopsis leucophaeata (Conrad, 1831) (Bivalvia: Dreissenidae) and Ficopomatus enigmaticus (Fauvel, 1923) (Polychaeta: Serpulidae) in Italy] - It is reported the first occurrence in Italy of the association between two allochthonous brackish species, Mytilopsis leucophaeata (Conrad, 1831) and Ficopomatus enigmaticus (Fauvel, 1923) in the assaciuccoli hydrographic area near Viareggio (Lucca, Italy). The presence of Ficopomatus enigmaticus has been already reported for several Italian localities, while Mytilopsis leucophaeata has been found in Italy only in the Venetian Lagoon.