<i>Eoviscaccia frassinettii</i> Jaw (IMAGE) American Museum of Natural History Caption This photo shows the fossilized jaw of the oldest chinchillid rodent, <i>Eoviscaccia frassinettii</i>, which is related to the modern chinchilla. Credit AMNH/M. Ellison 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.