A Silurian maxillate placoderm illuminates jaw evolution

@article{Zhu2016ASM,
  title={A Silurian maxillate placoderm illuminates jaw evolution},
  author={Min Zhu and Per Erik Ahlberg and Zhaohui Pan and You-an Zhu and Tuo Qiao and Wenjin Zhao and Liantao Jia and Jing Lu},
  journal={Science},
  year={2016},
  volume={354},
  pages={334 - 336}
}
Jaws from the jawless Until a fossil called Entelognathus was found to contain a tripartite jaw a few years ago, it was believed that the skeletons of early osteichthyans (bony fish), the ancestors of all vertebrates, were derived independently of those of the earlier placoderms (so-called jawless fish). Zhu et al. now describe a second Silurian placoderm that more securely bridges the jawless toothlike plates of placoderms to the development of the jawed condition that ultimately led to the… Expand
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