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A simplified phylogram and regional map of the Pogonomyrmex rugosus subtree. Branches marked with Roman numerals in the tree (left) correspond to well-supported subgroups identified in the phylogeny (Fig.3). The distribution estimates (right) are based on population localities shown in the subgroups map (Fig.5). The J1 lineage (VII) is not a member of the P. rugosus morphospecies, but it is included here because of its hybrid-introgressed mitochondria.
