A new feathered maniraptoran dinosaur fossil that fills a morphological gap in avian origin Xu, Xing ; Zhao, Qi ; Norell, Mark ; Sullivan, Corwin ; Hone, David ; Erickson, Gregory ; Wang, XiaoLin ; Han, FengLu ; Guo, Yu Abstract Publication: Science Bulletin Pub Date: February 2009 DOI: 10.1007/s11434-009-0009-6 Bibcode: 2009SciBu..54..430X