Coquí Frog Fossil Is Oldest in Caribbean (IMAGE) Florida Museum of Natural History Caption Researchers attribute a 29 million-year-old partial arm bone fossil to the genus Eleutherodactylus. The ancient frog, which may have resembled this reconstruction, was about an inch and a half long. Credit Jorge Velez-Juarbe Usage Restrictions Please credit Jorge Velez-Juarbe 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.