Evolutionary innovation in the vertebrate jaw: A derived morphology in anuran tadpoles and its possible developmental origin.

@article{Svensson2005EvolutionaryII,
  title={Evolutionary innovation in the vertebrate jaw: A derived morphology in anuran tadpoles and its possible developmental origin.},
  author={Mats G. E. Svensson and Alexander Haas},
  journal={BioEssays : news and reviews in molecular, cellular and developmental biology},
  year={2005},
  volume={27 5},
  pages={526-32}
}
The mouthparts of anuran tadpoles are highly derived compared to those of caecilians or salamanders. The suprarostral cartilages support the tadpole's upper beak; the infrarostral cartilages support the lower beak. Both supra- and infrarostral cartilages are absent in other vertebrates. These differences reflect the evolutionary origin of a derived feeding mode in anuran tadpoles. We suggest that these unique cartilages stem from the evolution of new articulations within preexisting cartilages… CONTINUE READING

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