FIG. 1.

Historical range of the sooty mangabey (C. atys atys) from south of the Casamance River in Senegal to the Nzo/Sassandra River systems in Côte d'Ivoire. The geographic origin of previously reported SIVsmm strains from Sierra Leone, Liberia, and western Côte d'Ivoire is shown in relation to the location of the Taï field site. Red dots indicate known capture locations of SIVsmm-infected sooty mangabeys, while yellow dots indicate sites where infected sooty mangabeys were identified in captivity (CI2 and CI8 were captured in western Côte d'Ivoire, close to the Liberian border). Green areas depict remaining coastal forest areas (http://www.globalforestwatch.org). The range of the white-crowned mangabey (C. atys lunulatus) extends from east of the Sassandra River to the Volta River in Ghana (26, 38). Country boundaries and major cities are indicated.