Bayesian topology based on COI mtDNA of digenean parasites. GenBank accession numbers precede species names. New sequences obtained for the present study are highlighted in bold. Phyllodistomum prasiluri (Gorgoderidae) and Dicrocoelium spp. (Dicrocoeliidae) were used as an outgroup. Support values are above nodes: posterior probabilities and bootstrap scores greater than 0.90 and 70, respectively, were considered well supported. The branch length scale bar indicates the number of substitutions per site (information about the sequences is shown in Table 2).