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来自维基百科,自由的百科全书
原龙目(Protorosauria),属于双孔亚纲的主龙形下纲,生存在二叠纪与三叠纪。许多物种已演化成树栖生活,包括有三角形翼的滑翔动物沙洛维龙;其他如长颈龙,拥有长而疆直的颈部,可能用来捕抓鱼类,可能是部分水生动物。
主龙形下纲 Archosauromorpha
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