Download - 5 Primates
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Primate Evolution
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Common Ancestor
• A common ancestor is the ancestor of two or more species.
• Shared derived characteristics are traits that species inherited from a common ancestor.
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Classification
Phylogenetics tries to trace the origins and ancestry of various type or organisms.
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Family Tree of Mammals
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Linnaean Classification
• Kingdom• Phylum• Class• Order• Family • Genus• Species
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Binomial Nomeclature
• All organisms are given a binomial (two-name) designation. This includes their genus and species.
• Homo sapiens = Humans• Felis catus = House cat
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Animals
• Animals are the Kingdom of organisms that:
• Are multi-cellular• Are independently mobile• Have sense organs• Eat food (as apposed to
photosynthesize).
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Kingdom:AnimaliaPhylum: ChordataClass: Mammalia
• Warm blooded (maintain constant body temperature)
• Have Hair at some point in their life cycle.• Have mammary glands (provide milk for
young)• Give birth to live young
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Kingdom:AnimaliaPhylum: ChordataClass:MammaliaOrder: Primates
• Adapted to living in trees• Grasping Hands• Large Brains• Stereoscopic vision
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Primates
Primates are a group of mammals that are adapted to living in trees through stereoscopic vision, grasping hands and large brains.
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Evolution
• Evolution is change in allele frequencies in populations over time.
• Evolution occurs through mutation, natural selection, gene flow and genetic drift.
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Primate Evolution Primates emerged around 58 million
years ago and can be divided into a number of families.
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Darwinius masillae ~47 million years
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Primate Evolution
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Primate Families
• Prosimians• New World Monkeys• Old World Monkeys• Hominoidea (Apes and Humans)
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Prosimians
• Live in Africa, South and South-East Asia (many in Madagascar)
• Have moist noses (like dogs and cats).• Large eyes• Limited opposability in their thumbs.• Least “human-looking” of the primates.
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Ring-tailed Lemur
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Slender Loris
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New World Monkeys
• Live in the Americas (Mexico, Central and South America)
• Have widely spaced nostrils separated by a thick septum.
• Many have prehensile tails (they can use their tails like an arm to grab things)
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Golden Lion Tamarin
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Capuchin Monkey
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Squirrel Monkey
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Old World Monkeys
• Live in Africa and Asia• Downward facing nostrils• Tails that aren’t prehensile
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Rhesus Macaque
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Rhesus Macaque
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Langur
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Hominoidea
Hominoidea is a category that contains both humans and apes.
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Hominoidea
• Both Apes and Humans are classified in this group
• Tail-less primates• Largest, most complex brains of any
primates• Good suspensory climbers
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Great Apes
There are four members of Hominidae that are commonly called the Great Apes.
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Orangutans
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Bonobo
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Gorilla
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Chimpanzee
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Gibbon: a “lesser ape”
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Siamang: a “lesser ape”
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Chimpanzees
• Of all extant primates, we share the most similarities genetically with chimps.
• Our DNA sequences are more than 98% identical with those of chimps.