Greater Growth of Proximal Metatarsals in Bird Embryos and the Evolution of Hallux Position in the Grasping Foot

@article{Botelho2017GreaterGO,
  title={Greater Growth of Proximal Metatarsals in Bird Embryos and the Evolution of Hallux Position in the Grasping Foot},
  author={J. Botelho and Daniel Smith-Paredes and S. Soto-Acu{\~n}a and Daniel N{\'u}{\~n}ez-Le{\'o}n and V. Palma and A. Vargas},
  journal={Journal of Experimental Zoology Part B: Molecular and Developmental Evolution},
  year={2017},
  volume={328},
  pages={106–118}
}
  • J. Botelho, Daniel Smith-Paredes, +3 authors A. Vargas
  • Published 2017
  • Biology, Medicine
  • Journal of Experimental Zoology Part B: Molecular and Developmental Evolution
  • In early theropod dinosaurs-the ancestors of birds-the hallux (digit 1) had an elevated position within the foot and had lost the proximal portion of its metatarsal. [...] Key Result To assess how the adult phenotype is acquired, we produced fate maps of the metatarsals of day 6 chicken embryos injecting the lipophilic tracer DiI. The fates of these marks indicate a larger expansion of the metatarsals at their proximal end, which creates the illusory effect that d1 moves distally.Expand Abstract
    3 Citations

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