Genealogical haplotype network analysis for a 655 bp fragment of ND5 of An. arabiensis in Sudan using the statistical parsimony method implemented in TCS (Clement et al. ). Localities where haplotypes were found are represented by different fill patterns, as shown in the legend. Haplotype with the highest outgroup probability is displayed as rectangle and are assumed to be ancestral; other haplotypes are displayed as ovals. Haplotype symbol sizes correspond to frequencies; nodes without haplotype numbers correspond to assumed intermediates. Haplotypes number 1–17 represent a normal form of An. arabiensis and haplotypes number 18–67 represent melanic form of An. arabiensis.