Palaeontology: Pterosaur embryo from the Early Cretaceous

@article{Wang2004PalaeontologyPE,
  title={Palaeontology: Pterosaur embryo from the Early Cretaceous},
  author={X. Wang and Z. Zhou},
  journal={Nature},
  year={2004},
  volume={429},
  pages={621-621}
}
Dinosaur embryos have been discovered all over the world, but so far no pterosaur embryos have been reported. Here we describe a Chinese fossil from the Early Cretaceous period containing an embryo that is unambiguously a pterosaur. The embryonic skeleton, which is exquisitely preserved in its egg, is associated with eggshell fragments, wing membranes and skin imprints. This discovery confirms that pterosaurs were egg-layers and sheds new light on our understanding of pterosaur development. 
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Eggshell and Histology Provide Insight on the Life History of a Pterosaur with Two Functional Ovaries.
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