5亿年前化石中的这个小爪子刚刚改写了蜘蛛的起源
当研究人员在一个 5 亿年前的标本中发现了一个不应该存在爪子的小爪子时，最初的例行化石清理变成了一个重大的科学惊喜。这个细节揭示了Megachelicerax cousteui，已知最古老的......
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来源: Science Daily
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What started as routine fossil cleaning turned into a major scientific surprise when researchers uncovered a tiny claw in a 500-million-year-old specimen where no claw should exist. That detail revealed Megachelicerax cousteaui, the oldest known relative of spiders, pushing the origins of this group back by 20 million years. The fossil shows that key features of modern spiders and horseshoe crabs were already emerging during the Cambrian Explosion.