Forelimb Anatomy (IMAGE) Cell Press Caption This graphic shows examples of forelimb anatomy in a number of extinct and living reptiles, showing the consistency in the paralleling of forearm bones and the shortness of the carpal bones. The forelimb of Drepanosaurus violates all of these patterns. Credit Adam Pritchard et al. Usage Restrictions Credit Required. 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.