1 700万年的巴西化石揭示了早期主要哺乳动物特征的演变。 17 million-year-old Brazilian fossils reveal earlier evolution of key mammalian features.

最近在巴西发现的化石，特别是食蟹齿兽物种 Brasilodon quadrangularis 和 Riograndia guaibensis，表明哺乳动物的关键特征，如下巴和中耳，进化得比以前认为的要早——1700 万年。 Recent fossil discoveries in Brazil, particularly of the cynodont species Brasilodon quadrangularis and Riograndia guaibensis, have revealed that key mammalian features, such as the jaw and middle ear, evolved earlier than previously thought—by 17 million years. 布里斯托尔大学的研究人员利用CT扫描分析这些化石,表明哺乳动物的特征在不同系别之间独立发展,使得对早期哺乳动物进化的理解复杂化。 Researchers from the University of Bristol utilized CT scanning to analyze these fossils, demonstrating that mammalian traits developed independently across different lineages, complicating the understanding of early mammal evolution.