一只完成了发育变化的青蛙(stage 66 热带爪蟾);凸显其尾杆骨 (IMAGE) Proceedings of the National Academy of Sciences Caption 一只完成了发育变化的青蛙(stage 66 热带爪蟾);凸显其尾杆骨。 Credit Image Courtesy of Gayani Senevirathne 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.