Table S1 Characteristics of eight microsatellite markers, designed for Rhagada convicta (cox), in a single population of Rhagada from Rosemary Island (= 46 individuals).

Table S2 Tests for Linkage disequilibria between pairs of loci in a single population of Rhagada from Rosemary Islands.

Table S3 Results of the Evanno method for K1…12, based on the analysis of 675 8-locus microsatellite genotypes in the program STRUCTURE.

Fig. S1 Differentiation among the 12 locations selected for the estimate of dispersal.

Appendix S1 Details of microsatellite marker development.

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