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Primate characteristics
Quadrupedal locomotion
A brachiator
A gibbon
• Flexible, generalized limb structure;• e.g.: a vertical clinger and leaper
A lemur
Prehensile hands (and feet); opposable thumb (and toe)Retention of 5 digits
Primate characteristics(continued)
GigantopithecusEst. 1,000 lbs.
Broad size range
A bushbaby
Nails instead of claws.
Tactile pads at ends of digits.
• Diet and teeth• 1. Lack of specialization.• 2. Generalized dentition.
Orbit
fully enclosed
Postorbital bar
Orbit completelyopen
• Visual information from each eye to visual centers in both hemispheres of brain
• Color vision: evolutionary trend for diurnal activity.
3-D vision
Reduced reliance on information from odors
Decreased reliance on sense of smell.
Increase in size andcomplexity of brain.
• Long gestation.• Reduced numbers of offspring/pregnancy.• Extended period of time to reach reproductive maturity• Greater dependence on flexible, learned behaviors
• Tendency to live in social groups.
• Menstrual and estrus cycles)