Australopithecus deyiremeda jaws (IMAGE) Cleveland Museum of Natural History Caption Casts of the jaws of Australopithecus deyiremeda, a 3.5 to 3.3 million-year-old human ancestor species from Ethiopia, held by Dr. Yohannes Haile-Selassie, who named the species in 2015 and lead-authored a newly published review of African hominin fossils from the middle Pliocene. Credit Photo credit: Laura Dempsey, Cleveland Museum of Natural History Usage Restrictions Once the 3 pm embargo lifts June 6, 2016, please grant public access to this and other images. 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.