FIG. 2.

Chimpanzee fecal sample collection sites in sub-Saharan Africa. International borders are shown in brown. Ranges of the four proposed chimpanzee subspecies are highlighted in color. The question mark (?) west of the lower Niger River indicates that the limited mtDNA sequences available to date from this region have clustered phylogenetically with P. t. verus (Gagneux et al. 2001). Collection sites were located in Cameroon (BB, BQ, CP, DP, MT, and WE), Cote d’Ivoire (TA), Republic of Congo (GT), Democratic Republic of Congo (BD, BU, WK), Gabon (LP), Rwanda (NY), and Tanzania (GM), as reported previously (Liu et al. 2008).