Metaxyspongia from the Early Cambrian Hetang Biota, China (image) Science China Press Share Print E-Mail Caption This is part of one of the new specimens of Metaxyspongia with tetraradial symmetry, and reconstruction of the whole animal. The fossil is 9 mm wide, with the delicate skeleton flattened onto the plane of the rock. Most of the skeleton is composed of cross-shaped spicules, except for the columns of modified spicules that define the symmetry of the sponge. Credit ©Science China Press Usage Restrictions None Share Print E-Mail 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.