MAT223H1 Chapter 4: Chapter 4 (Primate Ecology and Behaviour).docx
Document Summary
Primates are defined by their morphology to the environment. Wide field range of vision - stereoscopic vision fields of vision for both eyes intersect and contribute to vision. Ability to grasp branches in arboreal environments via hands and feet. 2 primate groups: strepsirhine primates (fig 4. 2), haplorhine primates (fig 4. 6) Haplorhine ->tarsiiformes (tarsiers), platyrrhini, catarrhini (chimpanzees, apes) Primitive unchanged dentition and skull over millions of years. Derived changed over time due to evolution and environmental factors. Unfused lateral jaw bones and frontal bone of skull. Fused lateral jaw bones and frontal skull bone. Large for enhancement in night vision through more entry of light. Large post orbital bar (bone ring around socket), no post orbital closure. Attached to nose limited range of facial expression and movement. Reduction in night vision but greater visual acuity. Normal orbital bar size, post orbital closure existent. Not attached to nose greater range of facial movement. Arboreal quadrapeds (utilizes all four limbs to move)
