Neural crest can form cartilages normally derived from mesoderm during development of the avian head skeleton.

@article{Schneider1999NeuralCC,
  title={Neural crest can form cartilages normally derived from mesoderm during development of the avian head skeleton.},
  author={Richard A Schneider},
  journal={Developmental biology},
  year={1999},
  volume={208 2},
  pages={441-55}
}
The lateral wall of the avian braincase, which is indicative of the primitive amniote condition, is formed from mesoderm. In contrast, mammals have replaced this portion of their head skeleton with a nonhomologous bone of neural crest origin. Features that characterize the local developmental environment may have enabled a neural crest-derived skeletal element to be integrated into a mesodermal region of the braincase during the course of evolution. The lateral wall of the braincase lies along… CONTINUE READING