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澳发现4新种 “走路鲨”能用鳍行走(附视频)

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科学家经过12年的研究,在澳洲北部海域发现4种“走路鲨”,使该属的物种数增加至9种。

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这4种新发现的鲨鱼属于天竺鲨科的其中一属,这些“走路鲨”以小型甲壳类与软体动物为食,平均体长不到1公尺,对人类没威胁。

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研究团队透过活捉样本的DNA,找到它们与原有的5种天竺鲨之间的关系,该科物种最早可以追溯至6600万到1亿年前的白垩纪晚期。

这4种“走路鲨”很可能是原种来到新区域后又进化发展出的新种,预计新种鲨鱼从200万年前开始出现在澳洲北部与纽几内亚之间的热带珊瑚礁海域,它们最大的特色是能在低氧的环境中用鱼鳍行走。

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