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真兽类
释义
真兽类
Encyclopedia
理学
哺乳纲(化石)
释
eutherians
真兽类
哺乳纲中兽类的一大分支,包括有胎盘类动物(placentals),以及在系统演化树上与有胎盘类的亲缘关系比与有袋类(marsupials)的亲缘关系更近的所有动物。
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