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新发现古鲨物种 仅一英尺长 拥螺旋状牙齿专吃小型海洋生物
科研人员近日在猛犸洞国家公园发现一种体长仅约一英尺(约30厘米)的古代鲨鱼物种,其最大特征为独特的螺旋状牙齿排列。这种牙齿结构专门用于粉碎螺类和其他小型海洋生物,显示出该物种在远古海洋生态中可能是中小型捕食者,具备专门适应特定猎物的进化特征,与现代大 ...
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