Final answer:
Small-bodied primates that jump between trees with long legs and elongated tarsals exhibit vertical clinging and leaping behavior, which is distinct from brachiation, which involves swinging from branch to branch using very long arms.
Step-by-step explanation:
Small-bodied primates with short arms, long legs, and elongated tarsals that jump between trees exhibit a type of locomoter behavior known as vertical clinging and leaping. This mode of locomotion is characterized by primates that propel their bodies through the force of their lower limbs. Such adapted movement is essential for navigating the arboreal environment where the sense of vision and three-dimensional perception is crucial for securing a subsequent branch or limb. These primates have adaptations like rotating shoulder joints and strong, grasping feet which are essential for climbing or brachiation—the swinging through trees using the arms. However, primates exhibiting vertical clinging and leaping are different than brachiators, which typically have very long arms to help them swing from branch to branch.