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The Great Leapers
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Published on Nov 19, 2015
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PRESENTATION OUTLINE
1.
The Great Leapers
primate locomotion
2.
Positional Behavior
body postures and movements
movement is direct correlation to posture
How and Why and Who are the leapers?
3.
posture
Resting Postures
"Mobile" Postures
4.
adaptations
contilevering
tail suspension
ischial collosities
Most adaptations are from the active body
5.
Leapers
Strepsirhine primates
Tarsiers
"Forceful, upward parabolic leaps"
Anthropoids "tend to leap outward along a horizontal plane"
Archicebus achilles, Ida
6.
Untitled Slide
Leap frequently
Size is limiting (not many leapers after 10kg)
Elongated hind limbs
Huge quadracep muscle
long lumbar region
7.
Example Argument
Elongated calcaneus & navicular bones higher on foot
morphological compromise between mechanical demands
Long Lever Arms = Long Feet
must be able to grasp and leap
8.
Which group of fossil primates shows evidence for leaping?
Omomyoids
Adapoids
All of the above
Photo by
thebarrowboy
Marissa Schlabach
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