Haplotype networks with nested clade design for the nuclear EF1α intron and exon.

<p>Haplotype circle size is proportional to its frequency. Each haplotypes is numbered. Haplotypes that exceed twenty individuals are labeled with the total number of individuals of that haplotype. Arrow indicates the root haplotype. Black empty circles represent extinct (or unsampled) haplotypes. Color codes indicate the six major rivers.