(IMAGE) Drexel University Caption Of the 142 types of bones not including the skull, 100 types of bones, or 70.4 percent, are represented in the <i>Dreadnoughtus</i> skeleton. Skull bones from any titanosaur are extremely rarely recovered. Credit Lacovara Lab, Drexel University 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.