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A New Species of Cathayornis from the Lower Cretaceous of Inner Mongolia, China and Its Stratigraphic Significance
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Supported by the Major Basic Research Projects (2006CB806400) of MST of China, the Chinese Academy of Sciences (kzcx3-sw-142), and the National Natural Science Foundation of China (40121202).

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    摘要:

    An incomplete postcranial avian skeleton is described from the Lower Cretaceous Jingchuan Formation of Otog Banner of western Inner Mongolia and referred to a new species of Cathayornis, C. chabuensis sp. nov. This is the first report of a Cathayornis from outside Liaoning Province. The new discovery indicates that Cathayornis coexisted with Otogornis genghisi, and a more detailed comparison between these two enantiornithine genera shows that Otogornis represents a more primitive genus than Cathayornis. Our analyses further indicate that Cathayornis is an arboreal bird. The discovery of a Cathayornis from this region also confirms that the avian fossil-bearing Jingchuan Formation is comparable to the Jiufotang Formation of the upper Jehol Group in western Liaoning, and should be referred to the middle-late Early Cretaceous.

    Abstract:

    An incomplete postcranial avian skeleton is described from the Lower Cretaceous Jingchuan Formation of Otog Banner of western Inner Mongolia and referred to a new species of Cathayornis, C. chabuensis sp. nov. This is the first report of a Cathayornis from outside Liaoning Province. The new discovery indicates that Cathayornis coexisted with Otogornis genghisi, and a more detailed comparison between these two enantiornithine genera shows that Otogornis represents a more primitive genus than Cathayornis. Our analyses further indicate that Cathayornis is an arboreal bird. The discovery of a Cathayornis from this region also confirms that the avian fossil-bearing Jingchuan Formation is comparable to the Jiufotang Formation of the upper Jehol Group in western Liaoning, and should be referred to the middle-late Early Cretaceous.

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LI Jianjun, LI Zhiheng, ZHANG Yuguang, ZHOU Zhonghe, BAI Zhiqiang, ZHANG Lifu, BA Tuya.2008. A New Species of Cathayornis from the Lower Cretaceous of Inner Mongolia, China and Its Stratigraphic Significance[J]. ACTA GEOLOGICA SINICA(English edition),82(6):1115~1123

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  • 收稿日期:2007-12-17
  • 最后修改日期:2008-06-17
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