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Divergence of SShD among the species of the melanogaster subgroup. Pairwise plots of the first three principal components (PCs) are displayed. Dots represent the total SShD for each species, associated with 95% confidence ellipses. The phylogenetic tree is projected on each PC plot, with the different complexes of the subgroup (erecta, yakuba and melanogaster) indicated by different types of dashed lines.
