Palaeontology: Early land vertebrates

@article{Carroll2002PalaeontologyEL,
  title={Palaeontology: Early land vertebrates},
  author={Robert Lynn Carroll},
  journal={Nature},
  year={2002},
  volume={418},
  pages={35-36}
}
A 350-million-year-old fossil provides evidence of an almost unknown stage in the origin of land vertebrates. It is also a reminder of how little is known of the relationships between the main lineages of amphibians and reptiles. 
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