Chaoyangsauridae

Chaoyangsauridae
Temporal range: Late Jurassic, 160–148 Ma
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Clade:Dinosauria
Order:†Ornithischia
Suborder:†Ceratopsia
Family:†Chaoyangsauridae
Zhao, Cheng, & Xu, 1999
Type species
†Chaoyangsaurus youngi
Zhao, Cheng, & Xu, 1999

Chaoyangsauridae is a family of ceratopsian dinosaurs. They are among the earliest known marginocephalian dinosaurs, with remains dating to about 160 million years ago, during the Late Jurassic period. Members of this group had sharp beaks for snipping off leaves to eat, and a very small frill.

Four dinosaur genera, Chaoyangsaurus, Xuanhuaceratops, Yinlong and Hualianceratops, are usually considered to belong to the Chaoyangsauridae.[1][2][3] All four animals are more primitive (or basal) than both Psittacosaurus and neoceratopsians.

References

  1. ↑ Zhao, X., Cheng, Z., Xu., X., and Makovicky, P. J. 2006. "A new ceratopsian from the Upper Jurassic Houcheng Formation of Hebei, China." Acta Geologica Sinica, 80 (4): 467–473 Full text.
  2. ↑ Han, Fenglu; Forster, Catherine A.; Clark, James M.; Xu, Xing (9 December 2015). "A New Taxon of Basal Ceratopsian from China and the Early Evolution of Ceratopsia". PLOS ONE. 10 (12): e0143369. PMC 4674058 . PMID 26649770. doi:10.1371/journal.pone.0143369.
  3. ↑ http://www.tandfonline.com/doi/abs/10.1080/02724634.2015.1029579

See also


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