Fig. 1: Distribution map of P. troglodytes and PanAf sampling.
From: Recent genetic connectivity and clinal variation in chimpanzees

The current approximate chimpanzee subspecies ranges1, sample collection locations and proposed subspecies geographic barriers. Total number of genotyped individuals and number of sampling locations are listed for each subspecies population. Much of the historical population located between P. t. ellioti and P. t. verus populations have been extirpated, creating an extensive sampling gap in the data. Note, samples collected during nationwide studies in Liberia and Equatorial Guinea were included in our spatially explicit analyses and are indicated here as the geographic centre points of the sampling distribution.