| 词条 | Simian shelf |
| 释义 |
The simian shelf is a bony thickening on the front of the ape mandible.[1] Its function is to reinforce the jaw,[2] though it also has the effect of considerably reducing the movement of the tongue by restricting the area available for muscles.[3] Humans are the only primates to have protruding chins, though some fossils of early humans show evidence of a simian shelf.[4]References1. ^{{cite web|url=http://dictionary.reference.com/browse/simian+shelf?jss=1#dict_header |title=Simian shelf |publisher=Random House |work=Dictionary.com Unabridged (v 1.1) |accessdate=2008-12-22}} {{primate-stub}}2. ^{{cite web |url=http://www.anth.ucsb.edu/glossary/glossary.html |archiveurl=https://web.archive.org/web/20060830160800/http://www.anth.ucsb.edu/glossary/glossary.html |archivedate=2006-08-30 |title=Online Anthropology Glossary |author=Wright, M. |year=1996 |accessdate=2008-12-22 |deadurl=yes |df= }} 3. ^{{cite book |author=Howells, W. |title=Mankind So Far |publisher=Doubleday |location=New York |year=1945 |pages=68}} 4. ^{{cite web |author=Custance, A. C. |year=1997 |title=The Implication of Convergence on Human Origins |work=Convergence and the Origin of Man |url=http://www.custance.org/old/evol/3ch3/3ch3.html |accessdate=2008-12-22}} 2 : Primate anatomy|Skull |
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