Modern amphibians -- frogs, salamanders and earthworm-like caecilians -- have been a bit slippery about divulging their evolutionary ancestry. Gaps in the fossil record showing the transformation of one form into another have led to a lot of scientific debate.
The fossil Gerobatrachus hottoni or elderly frog, described in the journal Nature, may help set the record straight.
"It's a missing link that falls right between where the fossil record of the extinct form and the fossil record for the modern form begins," said Jason Anderson of the , who led the study. "It's a perfect little frogamander," he said.
Another nail in the coffin.