1. Primates & Locomotion
Hannah Manuelito

2. Introduction
Primates can be classified on behavioral grounds into four major types: vertical clinging and leaping, quadrupedalism, brachiation, and bipedalism.
The differences between the four major categories lie principally in the degree to which the forelimbs and hind limbs are used to climb, swing, jump, and run.

3. Quadrupedalism (walking on all fours)
Physical Traits
Narrow thorax
Restricted shoulder joint
Forelimbs and hind limbs of similar lengths
Tail reduced
Species that are Quadrapeds
Gorillas

4. Brachiation (swinging and branch running)
Physical Traits
Broad thorax
Forelimbs longer than hind limbs
Reduced or absent pollex
Mobile shoulder joint
Short lumber joint
Mobile hip joint
Species that Brachiates
Mueller Gibbon

5. Clinging and Leaping Physical Traits of Clingers
Hindlimbs longer than forelimbs.
Long, prehensile digits.
Long lumbar region or vertebral column
Species of clingers/leapers
Silky Sifaka

6. Bipedalism (walking on two feet)
Species that are bipeds
Although there are several bipedal primates in the fossil records, humans are the only living bipedal primates.