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Click here!. Modern Primates. Lets have us a little looky-see. Some comparative terms. Arboreal v. Terrestrial Diurnal v. Nocturnal Vertical Clinging and Leaping v. Brachiation v. Quadrupedal Locomotion Herbivorous v. Carnivorous v. Omnivorous. Common Physical Primate Traits.
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Click here! Modern Primates Lets have us a little looky-see
Some comparative terms • Arboreal v. Terrestrial • Diurnal v. Nocturnal • Vertical Clinging and Leaping v. Brachiation v. Quadrupedal Locomotion • Herbivorous v. Carnivorous v. Omnivorous
Common Social Characteristics • Long-ish period of dependency • Evolutionary advantage – longer time to observe, develop complex social and survival behavior • Youth play – also develop useful skills • Coordination, fighting, social skills • Learning from others • Parents, siblings, other members of community
Prosimians: Lemurlike Forms • Lemurs Prosimian Literally, “pre-monkey” Mobile ears Twinning is Common Stereoscopic vision Hind legs suggest aptitude for VCL Snouts Quadrupedal locomotion Grasping hands
Prosimians: Lemurlike • Indris Vertical Clinging in action!
Prosimians: Lemurlike • Aye-ayes
Prosimians: Lorislike • Lorises Why such enormous eye sockets?
Prosimians: Lorislike • Bushbabies Note the HUGE disparity in limb size – Textbook example of the proportions of a VCL’er
Prosimians: Tarsiers • Tarsiers HUGE nocturnal eyeballs So-named due to huge ankle bones, help it leap Carnivorous (largely insectivorous) YUM!
Anthropoids: New World Monkeys • Marmosets Flattened faces, non-mobile ears Often birth twins Males help raise young, carry them Platyrrhines – flat-nosed; wide septum, nostrils point to side
Anthropoids: New World Monkeys • Tamarins
Anthropoids: New World Monkeys • Cebids Generally larger than Marmosets and Tamarins ~12.5 in 1-2 lbs Single-births more common ~3 ft Up to 30 lbs Wide variation in size, social habits, etc.
Anthropoids: Old World Monkeys • Colobine Monkeys Catarrhines – “hook nose” – narrow septum, downward pointing nostrils
Anthropoids: Old World Monkeys • Cercopithecines - Mandrills Terrestrial Sexual dimorphism Up to ~60 lbs
Anthropoids: Old World Monkeys • Cercopithecines cont’d Ischial callosities
Hominoids: Hylobates • Gibbons/Siamangs Excellent Brachiators!
Hominoids: Orangutans Note the striking sexual dimorphism!
Hominoids: Gorillas Led by a dominant male Knuckle-walking
Hominoids: Chimpanzees • Bonobos
Hominoids: Chimpanzees • Chimps Knuckle- walking Expressive faces