<i>Sapeornis�chaoyangensis</i> Specimen IVPP V19058. (IMAGE) Proceedings of the National Academy of Sciences Caption This is Sapeornis�chaoyangensis specimen IVPP V19058. Credit Image courtesy of Zhonghe Zhou Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.