基金supported by the National Basic Research Program of China(Grant No.2006CB806400)the Chinese Academy of Sciences(Grant No.KZCX2-EW-106)+3 种基金the Basic Work Program of MST of China(Grant No.2006FY120300-15)the National Natural Science Foundation of China(Grant No.40532010)Special Fund for Fossil Excavation and Preparation of Chinese Academy of SciencesUS National Science Foundation(Grant No.EAR-0120727,BCS-0309800,BCS-0820602)~~