Fig. 2
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Phylogenetic tree based on Bayesian inference, using the COI gene. Only posterior probabilities > 0.8 are shown. Numbers refer to the sampled localities (Fig. 1, Tab. 1). Scale bar (0.3) indicate the minimum inter-specific genetic divergence for the COI gene (barcoding gap). Top left: distribution of the genetic divergence within the genus Bythinella illustrating the barcoding gap.
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