92909 - 1) Platyrrhine monkeys a) Flat nose b) Nostrils...

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1) Platyrrhine monkeys a) Flat nose b) Nostrils point sideways c) New world monkeys d) Live in sound and central America e) Many have prehensile tails 2) Catarrhine monkeys a) Old world monkeys i) Hominids (1) Superfamily (a) Lack tails (b) Larger skulls (c) Knuckle walking b) Downward pointing nostrils c) Evolved and found in Asia 3) Evolution key terms a) Cranial characteristics i) Sagittal crest (1) A ridge of bone found along the midline of the cranium, commonly associated with muscle attachments to the lower jaw. ii) Nuchal crest (1) A ridge of bone found along the rear of the cranium at the base, commonly associated with neck musculature iii) Foramen magnum (1) The hole in the base if a cranium through which the spinal cord passes. The postion of the foramen magnum is significant relative to the locomotion of the individual iv) maxilla
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(1) upper jaw v) Mandible (1) Lower jaw vi) Prognathism (1) The degree to which the facial skeleton extends outward at an angle from the cranium. There us a relationship between the degree of Prognathism and reduction in the size of dentition, and reduction in olfactory apparatus. There is a trend among hominids to reduced Prognathism vii)Olfactory apparatus (1) Smelling/nasal viii) Post orbital constriction (1) Degree to which the neurcranium is constricted behind the eye orbits on
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This note was uploaded on 05/02/2010 for the course ISS 220 taught by Professor Bailey during the Spring '08 term at Michigan State University.

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92909 - 1) Platyrrhine monkeys a) Flat nose b) Nostrils...

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