Soft tissue preservation (IMAGE) University of Tokyo Caption Although soft tissue such as that found in the propatagium don’t fossilize well, there are some exceedingly rare, well-preserved examples such as these. The propatagium is labeled ppt in image D. Credit ©2023 Yurika Uno and Tatsuya Hirasawa CC-BY Usage Restrictions Credit must be given to the creator. License CC BY 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.