Rufous Lemur, i. [73]
Rufous Stump-tailed Macaque, ii. [11]
rufus, Lemur, i. [73]
Rump-spotted Guenon, ii. [72]
Rüppell's Guereza, ii. [97]
ruscinensis, Dolichopithecus, ii. [214], [242]
Rutledge's Langur, ii. [138]
rutledgii, Semnopithecus, ii. [133]
sabæa, Cercopithecus, ii. [58]