Dilong

 The Dilong was discovered 2004 in China, by Xu Xing. It lived in the Cretaceous Period, about 146 million to 125 million years ago. It was actually a realyy small dinosaur with a feathered tail at the tip. It has a single species, Dilong Paradoxus.

http://www.dinosaur-world.com/tyrannosaurs/dilong_paradoxus.htm