山东诸城地区下白垩统一新类型鸟类足迹
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A new avian footprint from the Lower Cretaceous in Zhucheng, Shandong Province
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    摘要:

    1931年,Mehl报道的来自Dakota Group的Ignotornis mcconnelli是第一个被广泛接受的中生代鸟类足迹。目前,亚洲、北美洲、欧洲、非洲和南美洲都有白垩纪鸟类足迹的报道,尤其以东亚地区最为丰富。山东诸城张祝河湾恐龙足迹点保存了一枚完整的鸟类足迹,笔者等对该鸟类足迹进行了详细描述与对比。研究认为,该鸟类足迹区别于以往发现的鸟类足迹,根据其形态建立了新种:玲珑诸城鸟足迹Zhuchengornipes exquisitus。玲珑诸城鸟足迹造迹者可能为滨鸟类,形成于干旱气候下的滨浅湖环境。

    Abstract:

    There is a complete avian footprint (ZDRC. F3) preserved in the Lower Cretaceous at the Zhangzhuhewan dinosaur footprint site in Zhucheng, Shandong Province. It had been briefly described and classified as the Jindongornipes sp. This article conducts a detailed systematic paleontological study of the footprint, and preliminary reconstruct the paleoenvironment and paleogeography of the Zhangzhuhewan dinosaur footprint site.Methods: A detailed feature description of the avian footprint in Zhangzhuhewan dinosaur footprint site was conducted using observation and measurement methods, and their morphological characteristics and related parameters were compared with the footprint of the Jindongornipodidae, analyzing the similarities and differences between the two. Based on regional geology, preservation characteristics of dinosaur and avian footprints, and layer structures, the paleogeography and paleoclimate of their survival period are reconstructed, and the formation environment and process of the avian footprint are speculated.Results: There are significant differences in the footprints between ZDRC.F3 and Jindongornipodidae: ① ZDRC.F3 is a small footprint with a width of 2. 9 cm, less than half of the bird family footprint in Jindongornipodidae, and not within the range of 6. 5~ 7. 5 cm in width; ② The digit Ⅱ is slightly longer than the digit Ⅳ, which does not conform to the characteristic of the Jindongornipodidae that the digit Ⅱ is shorter than the digit Ⅳ. ZDRC.F3 was removed from Jindongornipodidae and a new genus and species of Zhuchengornipes exquisitus gen.et sp.nov was established. The regional geology and characteristics of dinosaur and avian footprints and mud cracks indicate that Zhangzhuhewan dinosaur footprint site is located at the edge of a giant lake basin. The slope of the lake edge is small, and the lake water is shallow at Zhangzhuhewan site. During the dry season, the evaporation of the lake water exceeds the precipitation. Intermittent droughts occur at the edge of the lake, resulting in large areas of lakeside beaches exposed to the air. At that time, bird living nearby left footprints on the lakeside.Conclusions:Zhuchengonipes inquisitus gen. et sp. nov. is a new type of avian footprint that differs from the avian footprints previously discovered and may have been created by shorebirds. The avian footprint was formed in the coastal and shallow lake environment of arid climate in the Early Cretaceous.

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张艳霞,孙业君,陈军,崔卫生,陈树清,王增涛.2024.山东诸城地区下白垩统一新类型鸟类足迹[J].地质论评,70(2):411-416,[DOI].
ZHANG Yanxia, SUN Yejun, CHEN Jun, CUI Weisheng, CHEN Shuqing, WANG Zengtao.2024. A new avian footprint from the Lower Cretaceous in Zhucheng, Shandong Province[J]. Geological Review,70(2):411-416.

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  • 收稿日期:2023-10-15
  • 最后修改日期:2023-11-11
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  • 在线发布日期: 2024-03-20
  • 出版日期: 2024-03-15