Figure 1
From: Character displacement of Cercopithecini primate visual signals

Examples of guenon faces, illustrating interspecific diversity. Species: (a) Cercopithecus ascanius, (b) C. mitis, (c) Chlorocebus aethiops, (d) C. lhoesti, (e) C. neglectus, (f) Allenopithecus nigroviridis, (g) Ch. sabaeus, (h) C. sclateri, (i) C. diana, (j) C. campbelli, (k) C. hamlyni, (l) C. cephus, (m) Miopithecus talapoin, (n) Erythrocebus patas, (o) C. petaurista, (p) Ch. tantalus, (q) C. erythrotis, (r) C. erythrogaster, (s) C. mona, (t) C. nictitans, (u) C. wolfi, (v) C. pogonias, (w) C. lomamiensis, (x) C. preussi. (w) by M. Emetshu, reproduced with permission of K. Detwiler and J. Hart, (r) with permission of N. Rowe, all other images are by the author W. Allen.