Ateles fusciceps (Brown-headed Spider Monkey)
Ateles fusciceps Gray, 1866
It is a relatively large primate with unusually elongated limbs and body; it has a rudimentary, almost imperceptible thumb on the forelimbs; its tail is prehensile, with the inner surface of the distal end naked and a callosity that apparently helps it grip; its fur is thick and dark, the hairs of…
