Shedding light on serpent sight: the visual pigments of henophidian snakes.

@article{Davies2009SheddingLO,
  title={Shedding light on serpent sight: the visual pigments of henophidian snakes.},
  author={Wayne I. L. Davies and Jill A. Cowing and James K. Bowmaker and Livia S Carvalho and David J Gower and David M Hunt},
  journal={The Journal of neuroscience : the official journal of the Society for Neuroscience},
  year={2009},
  volume={29 23},
  pages={
          7519-25
        }
}
The biologist Gordon Walls proposed his "transmutation" theory through the 1930s and the 1940s to explain cone-like morphology of rods (and vice versa) in the duplex retinas of modern-day reptiles, with snakes regarded as the epitome of his hypothesis. Despite Walls' interest, the visual system of reptiles, and in particular snakes, has been widely neglected in favor of studies of fishes and mammals. By analyzing the visual pigments of two henophidian snakes, Xenopeltis unicolor and Python… CONTINUE READING

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