Scientists Have Identified a New Fossil Species of Axolotl in Mexico

Researchers at the National Autonomous University of Mexico have discovered a new fossil species of axolotl, named Ambystoma quetzalcoatli, in Hidalgo. This is the first fossil salamander species formally described in Mexico and the oldest record of the genus Ambystoma in the country. The fossils were found in Atotonilco el Grande, a region that once had a large freshwater lake system. The discovery sheds light on the evolution of Mexican biodiversity. The fossils, collected in the early 2000s, were re-examined using modern techniques, revealing significant anatomical differences from modern axolotls, such as an elongated skull opening and 17 trunk vertebrae. This study, published in Palaeontologia Electronica, involved comparisons with 13 living Ambystoma species using CT scans and 3D imaging. QUESTION: How might the discovery of ancient species like Ambystoma quetzalcoatli influence our understanding of current biodiversity and conservation efforts?