No protofeathers on pterosaurs

@article{Unwin2020NoPO,
  title={No protofeathers on pterosaurs},
  author={David M. Unwin and David M. Martill},
  journal={Nature Ecology \& Evolution},
  year={2020},
  volume={4},
  pages={1590 - 1591},
  url={https://api.semanticscholar.org/CorpusID:222168569}
}
The rarity of purportedly branched pycnofibres, their restriction to a single, relatively derived pterosaur clade and the absence of uniquely shared morphologies do not support the idea of homology with feathers, as Campione et al.13 have shown.
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27 References

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Pterosaur integumentary structures with complex feather-like branching

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