A Pair of Shelled Eggs Inside A Female Dinosaur

@article{Sato2005APO,
  title={A Pair of Shelled Eggs Inside A Female Dinosaur},
  author={Tamaki Sato and Y. Cheng and X. Wu and Darla K. Zelenitsky and Y. Hsiao},
  journal={Science},
  year={2005},
  volume={308},
  pages={375 - 375}
}
An oviraptosaurian specimen (Dinosauria, Theropoda) from an Upper Cretaceous formation in China retains a pair of shelled eggs in the pelvis, providing direct evidence that oviraptorosaurian dinosaurs laid paired elongatoolithid eggs. The presence of the paired eggs suggests that theropod dinosaurs had two functional oviducts (like crocodiles) but that each oviduct produced only one egg at a time and that an entire egg clutch was laid through multiple ovipositions (like birds). The orientations… Expand
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