Figure 1

Map of the sampling sites. Numbers indicate western Mediterranean zones where no individuals of Lightiella magdalenina were found during sampling campaigns. 1: Marseille (3 sites); 2: Stintino (1 site); 3: Alghero (2 sites); 4: Golfo Aranci (1 site); 5: Cala Finanza - Loiri Porto San Paolo (1 site). The boxed area in the map is depicted in further detail in the outset. PSG: Punta San Giorgio (41° 11' 23.9" N; 09° 23' 54.7" E); ISR: Isolotto Roma (41° 11' 43.1" N; 09° 23' 42.3" E).