A haplotype network of the mtDNA ND4 gene for Actinemys pallida from the Mojave River and available sequenced populations from San Diego, Los Angeles, and San Bernardino Counties, California. Each filled circle represents a sampled haplotype, with lines showing the most parsimonious relationship of haplotype relationships. Dots on lines represent unsampled haplotypes. For visual clarity, populations with more than two identical haplotypes were reduced to display only n=2 haplotypes from that population. The haplotype network clearly shows that the four Mojave River populations sampled (blue colors), have haplotypes that are identical to one of the three haplotypes sampled in San Mateo Creek, San Diego Co. California (yellow color).