Snapshots From the Meeting

摘要

About 340 million years ago, amphibians began to evolve into an amazing array of now-extinct forms. Some grew 3 meters long; others developed armor. One of the most diverse groups, called the Dissorophoidea, also concocted some more familiar shapes that resemble modern amphibians. Jason Anderson of the University of Calgary in Canada described an unnamed fossil that strengthens the case that dissorophoids gave rise to frogs and salamanders.