A miner in Chiapas discovered a tiny tree frog that has been preserved in amber for 25 million years, a researcher said. If authenticated, the preserved frog would be the first of its kind found in Mexico, according to David Grimaldi, a biologist and curator at the American Museum of Natural History who was not involved in the find.
Only a few preserved frogs have been found in chunks of amber — a stone formed by ancient tree sap — mostly in the Dominican Republic. Like those, the frog found in Chiapas was of the genus Craugastor, whose relatives still inhabit the region.
A Mexican researcher announced the rare find of a tiny tree frog completely preserved in amber on Wednesday that he estimates lived about 25 million years ago. The chunk of amber containing the 0.4-inch frog was uncovered by a miner in southern Chiapas states in 2005 and was bought by a private collector, who lent it to scientists for study.