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protocone
The protocone is a cusp of the molars of the upper dentition in Placental and Marsupial vertebrates.〔Gavin Prideaux, "Systematics and Evolution of the Sthenurine Kangaroos" (April 1, 2004). UC Publications in Geological Sciences. Paper vol_146. http://repositories.cdlib.org/ucpress/ucpgs/vol_146 p.16〕 It is found at the mesiolingual area of the tooth. The crests between the cusps are adaptations for slicing food during occlusion or mastication (chewing). Other cusps of the upper dentition of hominids include the paracone, hypocone, and the metacone. ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「protocone」の詳細全文を読む
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