Pyritized <i>Conotubus</i> Fossil Specimen (IMAGE) University of Missouri-Columbia Caption These are three-dimensionally pyritized tube-worm like fossils, Conotubus, from the 550-million-year-old Gaojiashan Lagerstätte, Shaanxi Province, South China. Credit Yaoping Cai, Northwest University, Xi'an, China 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.