Spotted Salamander (IMAGE) Indiana University Caption Spotted salamanders are the first known vertebrate to have an endosymbiont. The salamanders are found throughout eastern North America. Credit Courtesy of Roger Hangarter 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.