Paranthropus aethiopicus mandible (IMAGE) Proceedings of the National Academy of Sciences Caption Paranthropus aethiopicus�mandible�(the oldest specimen analyzed; Specimen L55s-33). Credit Image credit: Jonathan G. Wynn 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.