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地球学报  2009 

Cretaceous Strata in Nanxiong Basin of Guangdong and the Evolution from the Dinosaur Egg to the Bird Egg
广东南雄白垩系及恐龙蛋到鸟蛋演化研究

Keywords: Cretaceous,Pinnatoolithidae,dinosaur egg-bird egg,evolution,Nanxiong Basin
白垩系
,羽状蛋,恐龙蛋-鸟禽蛋,进化,南雄盆地

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Abstract:

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 stratigraphic 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.

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