A stem batrachian from the Early Permian of Texas and the origin of frogs and salamanders

@article{Anderson2008ASB,
  title={A stem batrachian from the Early Permian of Texas and the origin of frogs and salamanders},
  author={Jason S. Anderson and Robert R. Reisz and Diane M. Scott and Nadia Belinda Fr{\"o}bisch and Stuart S. Sumida},
  journal={Nature},
  year={2008},
  volume={453},
  pages={515-518}
}
The origin of extant amphibians (Lissamphibia: frogs, salamanders and caecilians) is one of the most controversial questions in vertebrate evolution, owing to large morphological and temporal gaps in the fossil record. Current discussions focus on three competing hypotheses: a monophyletic origin within either Temnospondyli or Lepospondyli, or a polyphyletic origin with frogs and salamanders arising among temnospondyls and caecilians among the lepospondyls. Recent molecular analyses are also… Expand
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