Fig. 4From: The roles of vicariance and isolation by distance in shaping biotic diversification across an ancient archipelago: evidence from a Seychelles caecilian amphibianIntra-Mahé AFLP clustering of Hypogeophis rostratus samples from STRUCTURE analyses. Contour lines on map are at 100 m elevational intervals. Referred populations to the northern, middle and southern groups are indicated to the right of the STRUCTURE plotBack to article page