A Palaeocene platypus from Patagonia, Argentina, known so far only by its molar teeth. Its presence demonstrates that monotremes (Monotremata), like marsupials, were part of the Gondwana fauna.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。