A basal alvarezsauroid theropod from the early Late Jurassic of Xinjiang, China.

@article{Choiniere2010ABA,
  title={A basal alvarezsauroid theropod from the early Late Jurassic of Xinjiang, China.},
  author={Jonah N. Choiniere and Xing Zhou Xu and James M Clark and Catherine A. Forster and Y. A. Guo and Fenglu Han},
  journal={Science},
  year={2010},
  volume={327 5965},
  pages={571-4}
}
The fossil record of Jurassic theropod dinosaurs closely related to birds remains poor. A new theropod from the earliest Late Jurassic of western China represents the earliest diverging member of the enigmatic theropod group Alvarezsauroidea and confirms that this group is a basal member of Maniraptora, the clade containing birds and their closest theropod relatives. It extends the fossil record of Alvarezsauroidea by 63 million years and provides evidence for maniraptorans earlier in the… CONTINUE READING
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