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The simian shelf is a bony thickening on the front of the ape mandible. Its function is to reinforce the jaw, though it also has the effect of considerably reducing the movement of the tongue by restricting the area available for muscles.
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- Howells, W. (1945). Mankind So Far. New York: Doubleday. p. 68.
- Custance, A. C. (1997). "The Implication of Convergence on Human Origins". Convergence and the Origin of Man. Retrieved 2008-12-22.
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