In the United States, such colonies have been established in all eight Regional Primate Research Centers. Under undisturbed conditions Old World monkey infants are weaned by their mothers at the age ...

These vocal primates are the biggest of all the New World monkeys. Unlike Old World monkeys, howlers and other New World species have wide, side-opening nostrils and no pads on their rumps.

Old World nonhuman primates commonly found in research institutions are distinguished by the following characteristics: Social disposition: Like human primates, nonhuman primates have an inherent need ...

but these primates (mostly Old World monkeys) have greatly reduced joint mobility throughout their limbs and they utilize more pronated hand positions. Terrestral quadrupedalism can be subdivided ...

The role of body-size variation as a "line of least evolutionary resistance" has been documented in both Old and New World monkeys (Figure 2). In these cases, diversification of cranial form ...

African monkeys are known as old-world monkeys. They are closely related to apes, which means they are also closely ...

A team of researchers from the Tokyo University of Science (Japan), led by Koichi Watashi, has discovered why Old World monkeys, such as the crab-eating macaque, naturally display HBV resistance, ...