摘要
首次实测了南雄盆地一条完整的白垩系剖面;沿剖面在66个层位中采集到蛋化石,新建了1个恐龙蛋科,2个属及6个种;在厘定南雄盆地和丹霞盆地的岩石地层后,统一提出了一套白垩纪地层单位名称。另外通过对羽状蛋化石的研究,揭示出恐龙蛋到鸟蛋的进化,是由于蛋壳棱柱层产生了变异,出现了从‘层状结构’到‘羽状结构’的转变;与现代鸟禽类对比后确认,恐龙蛋的棱柱层相当于鸟禽类的鳞片层(带);具有羽状结构的蛋化石是恐龙蛋演化到鸟蛋的一种中间类型。
A complete Cretaceous stratigraphic section in Nanxiong Basin was surveyed, and lots of dinosaur eggs including a new family, two genera and six species were found from sixty-six layers in this section. A unified stratigraphic nomenclature for the strata of Nanxiong Basin and Danxia Basin is proposed on the basis of strati- graphic correlation. The findings of the Pinnatoolithidae reveal the evolution from the dinosaur egg to the bird egg, which is characterized by the variation of the prismatic layer of egg shell from the layer structure to the pinnate structure. Compared with eggs of the living bird, the prismatic layer of the dinosaur egg should correspond to the layer of squamate aggregates of the bird, and the egg with the pinnate structure is the transition from the dinosaur egg to the bird egg.
出处
《地球学报》
EI
CAS
CSCD
北大核心
2009年第2期167-186,共20页
Acta Geoscientica Sinica
基金
国土资源部国家地质遗迹评价体系研究项目(200711)资助
关键词
白垩系
羽状蛋
恐龙蛋-鸟禽蛋
进化
南雄盆地
Cretaceous
Pinnatoolithidae
dinosaur egg-bird egg
evolution
Nanxiong Basin
