Anderson and colleagues describe a fossil amphibian from the Early Permian of Texas that has the chassis of a temnospondyl but with the addition of many features seen in modern frogs, toads and salamanders. A phylogenetic analysis splits modern Amphibia into two groups, with frogs, toads and salamanders related to temnospondyls, and caecilians to leopspndyls.
- Jason S. Anderson
- Robert R. Reisz
- Stuart S. Sumida
