Which primate feature is NOT a characteristic of Catarrhines?

Catarrhines, which include Old World monkeys and apes, exhibit several distinct characteristics, one of which is the absence of prehensile tails. Unlike some New World monkeys that possess prehensile tails capable of grasping branches, Catarrhines lack this adaptation.

The features specific to Catarrhines, such as a flat nose, ischial callosities, and diurnal behavior, are important traits. Their flat nose is indicative of their unique nasal structures, while ischial callosities serve as support for sitting and resting. Additionally, many Catarrhine species are notably diurnal, meaning they are active during the day. Thus, the presence of prehensile tails is not a characteristic of this group, which correctly identifies it as the feature that does not align with Catarrhine traits.