Mud Dragon (IMAGE) Virginia Tech Caption Details of the Eokinorhynchus rarus fossil, only a few millimeters in length, can be seen in this electron microscopic image. More than 530 million years old, the ancient worm was found in South China by researchers associated with Virginia Tech and is closely related to the ancestor of modern animal phylum kinorhyncha. Credit Virginia Tech 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.