Rendering of Nyasasaurus parringtoni (image) University of Washington Share Print E-Mail Caption Artist rendering of Nyasasaurus parringtoni, either the earliest dinosaur or the closest dinosaur relative yet discovered. Nyasasaurus parringtoni was up to 10 feet long, weighed perhaps 135 pounds and is depicted near plant-eating reptiles of the genus Stenaulorhynchus. Credit (c)Natural History Museum, London/Mark Witton Usage Restrictions Credit required Share Print E-Mail 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.