(Yan cuspate tooth).
Named By: Z.-X. Luo, P. Chen, G. Li & M. Chen - 2007.
Classification: Chordata, Mamamlia, Eutriconodonta, Jeholodentidae.
Species: Y. allini (type).
Size: About 13 centimetres long.
Known locations: China, Hebei Province - Huajiying Formation.
Time period: Aptian of the Cretaceous.
Fossil representation: Almost complete and articulated skeleton.
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.
- A new eutriconodont mammal and evolutionary development in early mammals. Nature 446:288-293. - Z.-X. Luo, P. Chen, G. Li & M. Chen - 2007.