<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.