Evidence for motility in 3.4 Gyr-old organic-walled microfossils ?
Evidence for motility in 3.4 Gyr-old organic-walled microfossils ?
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DOI：
10.1101/2020.05.19.103424
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发表时间：
2020-05
期刊：
影响因子：
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通讯作者：
F. Delarue;S. Bernard;K. Sugitani;F. Robert;R. Tartèse;S. Albers;R. Duhamel;S. Pont;S. Derenne
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文献类型：
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作者：
F. Delarue;S. Bernard;K. Sugitani;F. Robert;R. Tartèse;S. Albers;R. Duhamel;S. Pont;S. Derenne
据报道，最古老的生活方式是在公元前。3.4来自西澳大利亚州Strelley池组的10亿年前的硅化沉积物。对翼缘附属物的观察表明，太古代的生命运动是被动的，是由周围环境中的微生物漂移驱动的。到目前为止，主动运动的最古老的痕迹是ca。2.1十亿年前主动运动是否在太古代就已经存在，这仍然是一个悬而未决的问题。在这里，我们报告了新发现的34亿年前的尾巴微化石。这些微化石展示了一个像鞭子一样的附属物，可能为它们提供了运动能力。这表明这些微化石是最古老的活跃能动生命形式的遗骸。由于能够在液体中以及有机和/或矿物表面上移动，这些微生物早在34亿年前就能够逃离恶劣的环境和/或殖民新的生态位。这些根深蒂固的太古代能动生命形式的存在提供了一个新的太古代生物多样性的图片，与意想不到的进化创新形态的复杂性。
The oldest traces for planktonic lifestyle have been reported in ca. 3.4 billion years old silicified sediments from the Strelley Pool Formation in Western Australia. Observation of flange appendages suggests that Archean life motility was passive and driven by drifting of microorganisms in their surrounding environment. Until now, the oldest traces for active motility are ca. 2.1 billion years old. Whether or not active motility already existed during the Archean eon remains an open question. Here we report the discovery of new 3.4 billion years old tailed microfossils. These microfossils exhibit a lash-like appendage that likely provided them with movement capabilities. This suggests that these microfossils are the oldest remains of active motile life forms. With the ability to move in liquids and on organic and/or mineral surfaces, these microorganisms were capable of escaping from harsh environments and/or colonizing new ecological niches as early as 3.4 billion years ago. The existence of these deep-rooted Archean motile life forms offers a new picture of the Archean biodiversity, with unanticipated evolutionary innovative morphological complexities.