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来自维基百科,自由的百科全书
哺乳形态类(学名:Mammaliamorpha)是兽孔目犬齿兽亚目的一个演化支,包含了哺乳动物冠群与三瘤齿兽科最近共同祖先的所有后代[1],哺乳形类[2](Mammaliaformes)与巴西齿兽科(Brasilodontidae)都属于本演化支[1]。最早在三叠纪就已经出现[1][3]。
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