supported by the National Basic Research Program of China(973 Program,2012CB821906);the National Natural Science Foundation of China(41172020,41472023,41172016,41372014);the Chinese Academy of Sciences
We report on an exceptional specimen of Eoconfuciusornis preserving rare soft-tissue traces of the ovary and wing. Ovarian follicles preserve a greater hierarchy than observed in Jeholornis and enantiornithines,sugges...