Scientists have discovered a new tetrapod fossil, named Tanyka amnicola, which was discovered at the edge of the Amazon rainforest in Brazil. The fossil has an unusual twisted jaw with denticles likely used to grind tough food. It was also discovered as a ‘living fossil’, meaning it was alive when most of its counterparts were extinct and survived the Carboniferous Rainforest Collapse despite a drastic change in climate. The discovery reveals that this type of ancient species survived the climate change and climate changes that led to the death of many species. Tanyaka amnicolas was identified after comparing its jawbone to nine jaws with those of other species across hundreds of millions of years.