近日研究人员在一个古代茧里发现了目前为止最古老的化石动物精子。它的形状和大小类似于现代“小龙虾蠕虫”精子,专家相信它将揭示过去5000万年间有关这种蠕虫进化的线索。这项完好保存的发现比相似的发现早1000万年,专家希望利用成像技术研究全世界各地收集的其他茧。这个化石环带纲茧是从南极洲半岛马兰比奥岛拉梅塞塔形成物的沉积物里收集到的,环带纲是一种包括蚯蚓 Recently, researchers found the oldest fossil animal sperm in an ancient cocoon. It is shaped and sized like the modern “crawfish worm” sperm, and experts believe it will reveal clues to the evolution of the worm over the past 50 million years. This well-preserved discovery is 10 million years earlier than similar findings, and experts hope to use imaging techniques to study other cocoons collected around the world. The fossil ring ring cocoon was collected from the sediments of the La Mesa formation in Malanbiao, Antarctica, a zone that includes earthworms