In Depth
Though commonly stated to be mammal, the evolutionary placement of Yanoconodon amongst mammals is uncertain due to the fact that Yanoconodon shows a development of an inner ear. This is an advanced feature upon what otherwise might be interpreted as a more primitive mammaliaform body.
Further Reading
- A new eutriconodont mammal and evolutionary development in early mammals. Nature 446:288-293. - Z.-X. Luo, P. Chen, G. Li & M. Chen - 2007.