Did True Frogs 'Dispersify?' (IMAGE) University of Kansas Caption KU researchers concluded true frogs didn't become one of the most biodiverse frog family due to dispersing into new ranges, or due to filling a gap created by a catastrophic die-off. Rather, the rich diversity of species in the Ranidae family comes from millions of years' worth of continual evolution influenced by a host of different environs. Credit University of Kansas |KU News Service 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.