Fischer J, Kopp GH, Dal Pesco F, Goffe A, Hammerschmidt K, Kalbitzer U, Klapproth M, Maciej P, Ndao I, Patzelt A, Zinner D. Charting the neglected West: The social system of Guinea baboons. Am. J. Phys. Anthropol. 2017;162:15–31. doi:10.1002/ajpa.23144 Page 20, “The relative values in adult males varied between 0.45 and 1.2 mm3/kg body mass, with a mean of 0.8 mm3/kg body mass.” Should be: “The relative values in adult males varied between 0.45 and 1.2 cm3/kg body mass, with a mean of 0.8 cm3/kg body mass.” Table 1, bottom line, “Rel. test. vol. [mm3/kg]” should be “Rel. test. vol. [cm3/kg]” Table 2, 4th footnote, “relative testicular volume [mm3/kg]” should be “relative testicular volume [cm3/kg];”