Fig. 1

Worldwide distribution of Palaemon macrodactylus Rathbun 1902, and the study area (inset). 1 North coast of China (Peitaiho, Tangku, Chefoo and Yangmatao); 2 Korea (Gensan, Jinsen, Pusan); 3 Japan (Aomori, Matsushima, Tokyo Bay, Sagami Bay, Atumi Bay, Nagasaki); 4 Pacific coast of North America (California: Monterey Bay, Los Angeles Harbor, San Francisco Bay; Oregon: Coos Bay); 5 Southwestern Australia (Gulf St. Vincent, Barker Inlet); 6 Gulf of Cádiz, Spain (Guadalquivir Estuary, Guadalete Estuary, San Pedro River, Salado River); 7 Orwell Estuary, Suffolk, UK; 8 Yacht harbour of Zeebrugge, Belgium; 9 Westerschelde Estuary and Ijmiden, The Netherlands; 10 mouth of Geeste River, Bremerhaven, Germany; 11 Hooksiel, Germany; 12 Mar del Plata harbour, Argentina