Fig. 3From: The roles of vicariance and isolation by distance in shaping biotic diversification across an ancient archipelago: evidence from a Seychelles caecilian amphibianIsland sampling localities and population clustering of Hypogeophis rostratus based on STRUCTURE analyses. AFLP clustering in: a) all specimens, b) the northern-island cluster identified from the all specimen analysis, d) the southern-island cluster identified from the all specimen analysis, c) map of Seychelles islands sampled during this study; dark grey contours = − 30 m/bpsl, light grey contours = − 50 m/bpslBack to article page