The earliest dromaeosaurid theropod from South America

@article{Makovicky2005TheED,
  title={The earliest dromaeosaurid theropod from South America},
  author={Peter J Makovicky and Sebasti{\'a}n Apestegu{\'i}a and Federico L. Agnolin},
  journal={Nature},
  year={2005},
  volume={437},
  pages={1007-1011}
}
The evolutionary history of Maniraptora, the clade of carnivorous dinosaurs that includes birds and the sickle-clawed Dromaeosauridae, has hitherto been largely restricted to Late Jurassic and Cretaceous deposits on northern continents. The stunning Early Cretaceous diversity of maniraptorans from Liaoning, China, coupled with a longevity implied by derived Late Jurassic forms such as Archaeopteryx, pushes the origins of maniraptoran lineages back to Pangaean times and engenders the possibility… 

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