Figure 1

Majority rule consensus parsimony tree based on two concatenated mtDNA genes ( ND1 and cyt b ). For the major clades of the main tree, values equal to or over 70% are shown for ML (above, left); MP (below, left); and NJ (below, right); and above 0.90 for B (above, right). 100* means that all bootstrap values and posterior probabilities are equal to or higher than 95. The tree was rooted with A. sapidissima. The lineages corresponding to the main taxonomic units analyzed were colored differently. A. alosa and A. fallax haplotype codes are also presented in three distinct colors, representing the main clades found within each species, as displayed in Figure 2. Three classes of introgressed haplotypes were found between A. alosa and A. fallax: ♯, haplotypes only found in phenotypically designated A. fallax but located in the A. alosa clade; §, haplotypes found in phenotypically designated A. alosa and A. fallax, but located in the A. alosa clade; and ¥, haplotypes found in phenotypically designated A. alosa and A. fallax but found in the A. fallax clade. A Bayesian tree is presented in the left upper corner for branch length visualization. Colors correspond to those shown in the main tree. Although A. sapidissima was also used as an outgroup in the construction of the Bayesian tree, this was later removed from the figure for simplification.