Temporal range: Upper Jurassic
A nearly complete skeleton, with an incomplete skull with full dentition was found. It was collected in the Daxigou site, Jianchang, from the Tiaojishan Formation. It is dated at about 160 million years ago.
The discovery of Juramaia provides new insight into the evolution of eutherian mammals. It shows their lineage diverged from that of the marsupials 35 million years earlier than previously thought. Furthermore, its discovery fills gaps in the fossil record and helps to calibrate modern, DNA-based methods of dating the evolution.
Related pages[change | change source]
References[change | change source]
- Juramaia sinensis - 160-million-year-old fossil pushes back mammal evolution
- Zhe-Xi Luo, Chong-Xi Yuan, Qing-Jin Meng and Qiang Ji (2011). "A Jurassic eutherian mammal and divergence of marsupials and placentals". Nature 476: 442–445. doi:10.1038/nature10291. PMID 21866158. http://184.108.40.206:9998/91keshi/Public/File/34/476-7361/pdf/nature10291.pdf. Electronic supplementary material
- "Fossil redefines mammal history" BBC News
- Discovery of a 160-million-year-old fossil represents a new milestone in early mammal evolution