A new Jurassic scansoriopterygid and the loss of membranous wings in theropod dinosaurs

@article{Wang2019ANJ,
  title={A new Jurassic scansoriopterygid and the loss of membranous wings in theropod dinosaurs},
  author={Min Wang and Jingmai K. O’Connor and Xing(徐星) Xu and Zhonghe Zhou},
  journal={Nature},
  year={2019},
  volume={569},
  pages={256-259}
}
Powered flight evolved independently in vertebrates in the pterosaurs, birds and bats, each of which has a different configuration of the bony elements and epidermal structures that form the wings1,2. Whereas the early fossil records of pterosaurs and bats are sparse, mounting evidence (primarily from China) of feathered non-avian dinosaurs and stemward avians that derive primarily from the Middle–Upper Jurassic and Lower Cretaceous periods has enabled the slow piecing together of the origins… 
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