<i>Dickinsonia</i> (IMAGE) University of California - Riverside Caption Dickinsonia costata, an extinct soft-bodied organism representing one of the first complex metazoans in the fossil record. Total length 53.5?mm. Credit Scott Evans 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.