进化最极端的哺乳动物:凶猛麝香牛已灭绝(7)
7.绒毛猴
绒毛猴
绒毛猴(woolly monkey)只见于南美洲的热带森林,属于蜘蛛猴科(Atelidae),是中美洲和南美洲的一群灵长动物,它们的祖先被认为是第一批在非洲进行演变的物种。虽然这种生物非常稀少,但是化石记录显示,它们的祖先可能是新世界时期生活在非洲的灵长类动物,后来在大约4000万年前,通过漂浮在水面上的植被或者大风暴漂洋过海,来到南美洲。到达南美洲后,这种树居动物通过进化,显示出令人吃惊的丰富多样性和独有的特点,例如又长又壮的胳膊和善于抓握的尾巴,它们的尾巴能伸展30英寸。它们拥有的弹性很好、没有毛发的指端及皮肤,最适合现代绒毛猴抓握树枝。
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