arthropod (IMAGE) Penn State Caption Fossil of a juvenile arthropod, Leanchoilia illecebrosa, showing fine anatomical details of the appendages and preserving the gut tract. Credit Xianfeng Yang, Yunnan Key Laboratory for Palaeobiology, Yunnan University Usage Restrictions non commercial use only 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.