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辽宁昌图上白垩统泉头组恐龙蛋化石的分类订正

2013年第51卷 第4期: 278-288

发表日期:2013-12-04来源:放大 缩小

编辑:刘金远,王  强,赵资奎,汪筱林,高春玲,沈才智 

  摘要:重新描述了20世纪20年代发现于辽宁省昌图地区的恐龙蛋化石。通过对这些标本的宏观和微观形态特征的观察与测量数据分析,将其归入圆形圆形蛋(Spheroolithus spheroides)和厚皮圆形蛋(Spheroolithus megadermus), 这是目前这两个蛋种的第二次化石记录。这两个蛋种首次发现于山东莱阳上白垩统将军顶组,根据昌图及其邻近地区恐龙蛋化石与山东莱阳恐龙蛋化石群的对比,结合松辽盆地近年来泉头组的研究成果,认为泉头组的地质时代为晚白垩世早、中期。 

  关键词:辽宁昌图,晚白垩世,泉头组,恐龙蛋,圆形蛋类 

  卷期:51 04 

  

A parataxonomic revision of spheroolithid eggs from the Upper Cretaceous Quantou Formation in Changtu, Liaoning

LIU Jin-Yuan, WANG Qiang, ZHAO Zi-Kui, WANG Xiao-Lin, GAO Chun-Ling, SHEN Cai-Zhi

 

 

Abstract  We re-described the dinosaur eggs from the Upper Cretaceous Quantou Formation in Changtu, Liaoning Province. Based on the macrostructure of eggs and the microstructure of eggshells: spheroid or near-spheroid eggs, thick eggshell, bamboo-leaves-like or lanceolate wedges in cone, clear inter-wedge spaces, columnar layer composed of more than 4 superimposed eggshell units, these eggs are assigned to Spheroolithus spheroides (Young, 1954) Zhao, 1979, and Spheroolithus megadermus (Young, 1959) Zhao, 1979, respectively. With the comparison of dinosaur egg assemblages from Changtu in Liaoning Province and Laiyang in Shandong Province, the Quantou Formation should be corresponding to the early-middle Late Cretaceous.

Key words  Changtu, Liaoning; Late Cretaceous; Quantou Formation; dinosaur egg, spheroolithid

 

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