…The eyes, capable of binocular vision, are positioned from the sides of the head toward the center of the head, forming the face. With the exception of the primitive Paleocene fossil species Plesiadapis , all other primate species have closed eye rings (rims of the eye sockets). Furthermore, a series of phenotypic changes, such as a smaller jaw and a smaller number of teeth, are associated with changes in the eyes. … *Some of the terminology that mentions "Plesiadapis" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…両眼視が可能な目は,頭部側方から正中に寄り,顔面をつくる。暁新世の原始的な化石種プレシアダピスPlesiadapisを除いて,これ以外の霊長類の種はすべて眼輪(がんりん)(眼窩(がんか)のふち)が閉じている。さらに,口顎部の縮小,歯数の減少などの一連の形質的変化は,目の変化と関連している。… ※「Plesiadapis」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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