Figure 1 in Forest monkeys and Pleistocene refugia: a phylogeographic window onto the disjunct distribution of the Chlorocebus lhoesti species group

Figure 1. Present ranges of the lhoesti group relative to two putative Pleistocene refugia and the Congo River Basin. Species distributions follow Kingdon (1997), and refuges follow Grubb (2001). Harrison (1988) hypothesized that the evolutionary dispersal of the lhoesti group followed an eastward path around the Congo Basin, along either its northern or southern rim. In contrast, Kaplin (2002) suggested that the lhoesti group ancestor may have spread through the basin, with its present distribution being the result of a vicariant event.