Chinese Science Bulletin

, Volume 46, Issue 19, pp 1669–1672 | Cite as

A new iguanodontid (Jinzhousaurus yangi gen. et sp. nov.) from the Yixian Formation of western Liaoning, China

  • Xiaolin Wang
  • Xing Xu


A new iguanodontid,Jinzhousaurus yangi gen. et sp. nov., is erected based on the cranial and dental morphology of a specimen from the Yixian Formation of western Liaoning. Although a few primitive characteristics remain,Jinzhousaurus yangi display a number of characteristics similar to those seen in derived iguanodontids. Other interesting characteristics include the absence of antorbital fenestra and the frontal excluded from the participation in orbit, which are closer to the condition in hadrosaurids. The unusual combination of the characteristics provides important data for assessing morphological evolution toward hadrosaurs. The new discovery also represents the first reported large-sized dinosaur from Jehol fauna in western Liaoning, and increases the diversity of this famous fauna. Furthermore, the discovery of a derived iguanodontid from the Yixian Formation provides further evidence supporting a Cretaceous age of the Jehol fauna, which is consistent with an isotopic age.


Western Liaoning Lower Cretaceous Yixian Formation Jehol Biota Iguanodontid 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Sereno, P. C., Phylogeny of the bird-hipped dinosaurs (Order Ornithischia), Natl. Geogr. Soc. Res., 1986, 2: 234.Google Scholar
  2. 2.
    Forster, C. A., Hadrosauridae (eds. Currie, P. J., Padian, K.), Encyclopedia of Dinosaurs, San Diego: Academic Press, 1997, 293–299.Google Scholar
  3. 3.
    Forster, C. A., Iguanodontidae (eds. Currie, P. J., Padian, K.), Encyclopedia of Dinosaurs, San Diego: Academic Press, 1997, 359–361Google Scholar
  4. 4.
    Norman, D. B., Weishampel, D. B., Iguanodontidae and related ornithopods (eds. Weishampel, D. B., Dodson, P., Osmólska, H.), The Dinosauria, Berkeley: University of California Press, 1990, 510–533.Google Scholar
  5. 5.
    Mantell, G. A., Notice on theIguanodon, a newly discovered fossil reptile, from the sandstone of Tilgate Forest, in Sussex, Phil. Trans. Roy. Soc. London, 1825, 15: 179.CrossRefGoogle Scholar
  6. 6.
    Gao, K., Tang, Z. L., Wang, X. L., A long-necked diapsid reptile from the Upper Jurassic / Lower Cretaceous of Liaoning Province, northeastern China, Vert. PalAsiat., 1999, 37(1): 1.Google Scholar
  7. 7.
    Taquet, P., Géologie et paléontologie du gisement de Gadoufaoua (Aptian du Niger), Cahiers Paléontol. C.N.R.S. Paris, 1976, 1–191.Google Scholar
  8. 8.
    Norman, D. B., On the ornithischian dinosaurIguanodon bernissartensis of Bernissart (Belgium), Mem. Inst. R. Sci. Natl. Belg., 1980, 178: 1.Google Scholar
  9. 9.
    Norman, D. B., On the anatomy ofIguanodon atherfieldensis (Ornithischia, Ornithopod), Bull. Inst. R. Sci. Nat. Belg. Sci. Terre, 1986, 56: 281.Google Scholar
  10. 10.
    Gilmore, C. W., Osteology of the Jurassic reptileCamptosaurus, with a revision of the species of the genus, and a description of two new species, Proc. U.S. Natl. Mus., 1909, 36: 197.Google Scholar
  11. 11.
    Weishampel, D. B., Bjork, P. R., The first indisputable remains of Iguanodon (Ornithischia: Ornithopoda) from North America:Iguanodon lakotaensis n sp. J. Vert. Paleontol., 1989, 6: 38.Google Scholar
  12. 12.
    Rozhdestvensky, A. K., New iguanodonts from Central Asia, Phylogenetic and taxonomic relationships between late Iguanodontidae and early Hadrosauridae (in Russian), Paleont. Zh., 1966, 3: 103.Google Scholar
  13. 13.
    Bartholomai, A., Molnar, R. E.,Muttaburrasaurus, a new iguanodontid (Ornithischia: Ornithopoda) dinosaur from the Lower Cretaceous of Queensland, Mem. Queensland Mus., 1981, 20: 319.Google Scholar
  14. 14.
    Xu, X., Zhao, X. J., Lü, J. C. et al., A new Iguanodontian from Sangping Formation of Neixiang, Henan and its stratigraphical implication, Vert. PalAsiat., 2000, 38(3): 176.Google Scholar
  15. 15.
    Weishampel, D. B., Horner, J. R., Hadrosauridae (eds. Weishampel, D. B., Dodson, P., Osmólska, H.), The Dinosauria, Berkeley: University of California Press, 1990, 533–561.Google Scholar
  16. 16.
    Lü, J. C., A new Iguanodontidae (Probactrosaurus mazongshanensis sp. nov.) from Mazongshan Area, Gansu Province, China, (ed. Dong, Z. M.), The Sino-Japanese Silk Road Dinosaur Expedition, Beijing: China Ocean Press, 1997, 27–47.Google Scholar
  17. 17.
    Xu, X., Wang, X. L., New psittacosaur (Ornithischia, Ceratopsia) occurrence from the Yixian Formation of Liaoning, China and its stratigraphic significance, Vert. PalAsiat., 1998, 36(2): 147.Google Scholar
  18. 18.
    Xu, X., Wang, X. L., You, H. L., A primitive ornithopod from the Yixian Formation of China, Vert. PalAsiat., 2000, 38(4): 318.Google Scholar
  19. 19.
    Chen, P. J., Wen, S. X., Zhou, Z. Y. et al., Studies on the late Mesozoic continental formations of western Liaoning, Nanjing Inst. Geol. Paleont. Acad. Sin. Bull., 1980, 1: 22.Google Scholar
  20. 20.
    Wang, X. L., Wang, Y. Q., Zhou, Z. H. et al., Vertebrate faunas and biostratigraphy of the Jehol Group in western Liaoning, China, Vert. PalAsiat., 2000, 38(supp): 40.Google Scholar
  21. 21.
    Smith, P. E., Evensen, N. M., York, D. et al., Dates and rates in ancient lakes:40Ar/39Ar evidence for an Early Cretaceous age for the Jehol Group, northeast China, Can. J. Earth Sci., 1995, 32: 1426.CrossRefGoogle Scholar

Copyright information

© Science in China Press 2001

Authors and Affiliations

  • Xiaolin Wang
    • 1
    • 2
  • Xing Xu
    • 1
  1. 1.Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijingChina
  2. 2.College of Earth Sciences and ResourcesChina University of GeosciencesBeijingChina

Personalised recommendations