To date, M. lignano has only been found in locations near Lignano Sabbiadoro (Italy): tidal lagoons on the eastern side of Bibione and the Isola di Martignano, natural and semi-natural beaches of the Laguna di Marano and the Isola Valle Vechia.
•
The species name, lignano, comes from the location where this species has so far been found, the sandy beaches and lagoons at and near Lignano Sabbiadoro, Italy.