Additional file 1.

Figure S1. Node age estimates among each mtDNA clade for the combined dataset, using the software BEAST v.1.6.1 and considering a relaxed uncorrelated lognormal clock and the Yule process of speciation as tree prior. Estimation of the used substitution rate is explained in the text.

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Rato et al. BMC Evolutionary Biology 2012 12:14   doi:10.1186/1471-2148-12-14