An Early Cretaceous heterodontosaurid dinosaur with filamentous integumentary structures

@article{Zheng2009AnEC,
  title={An Early Cretaceous heterodontosaurid dinosaur with filamentous integumentary structures},
  author={Xiao-ting Zheng and Hailu You and Xing Xu and Zhi-ming Dong},
  journal={Nature},
  year={2009},
  volume={458},
  pages={333-336}
}
Ornithischia is one of the two major groups of dinosaurs, with heterodontosauridae as one of its major clades. Heterodontosauridae is characterized by small, gracile bodies and a problematic phylogenetic position. Recent phylogenetic work indicates that it represents the most basal group of all well-known ornithischians. Previous heterodontosaurid records are mainly from the Early Jurassic period (205–190 million years ago) of Africa. Here we report a new heterodontosaurid, Tianyulong… 
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