New World monkeys are divided into two groups, the Marmoset and the Capuchin families, of the primate order, but the Guerdi's monkey has been variously treated as either part of the Marmoset family, or the Capuchin family, or more recently as an independent family (illustration). Its head and body length is 20 cm. It looks like a black marmoset, and all of its claws on its hands and feet except for its big toe are claws, which is characteristic of the Marmoset family, but its dental formula is , which is characteristic of the Capuchin family. In this way, the Guerdi's monkey has an intermediate morphology between the two groups of New World monkeys, making it a valuable specimen when considering the evolution of New World monkeys. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
新世界ザルは霊長目キヌザル科とオマキザル科の二つのグループに分けられるが,ゲルディモンキーはキヌザル科に入れられたり,オマキザル科に入れられたり,また最近では独立の科とみなされるなどさまざまな扱いを受けてきた(イラスト)。頭胴長20cm。外見上は黒いマーモセットという感じで,手足のつめが足の親指を除いてすべてかぎづめである点はキヌザル科の特徴であるが,歯式は,で,オマキザル科の特徴を示している。このように,ゲルディモンキーは新世界ザルの二つのグループの中間的な形態を備えており,新世界ザルの進化を考えるうえで貴重な存在である。
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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