Dipterocarp fossil (IMAGE) Penn State Caption A fragment fossil of an enormous dipterocarp leaf (estimated size 16,000 mm squared or 2 feet squared) is an exemplar specimen and is already one of the largest fossils in the collection. Credit Peter Wilf, Penn State Usage Restrictions Educational use only License Original 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.