一种来自中国江西萍乡的新的长形蛋科化石，彭氏波动蛋（新分类单元，卵及卵壳）。

A new form of Elongatoolithidae, Undulatoolithus pengi oogen. et oosp. nov. from Pingxiang, Jiangxi, China.

作者信息

Wang Qiang, Zhao Zikui, Wang Xiaolin, Li Ning, Zou Songlin

机构信息

Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Scinences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China.; Email:

出版信息

Zootaxa. 2013 Dec 10;3746:194-200. doi: 10.11646/zootaxa.3746.1.9.

DOI:10.11646/zootaxa.3746.1.9

PMID:25113475

Abstract

A new oogenus and oospecies of the Elongatoolithidae, Undulatoolithus pengi oogen. et oosp. nov., is described on the basis of specimens from the Upper Cretaceous Zhoutian Formation of the Pingxiang Basin, Jiangxi Province, China. The eggs are slightly asymmetrical, paired, and lay radially-oriented in a circular configuration within the clutch, and most suggestive of Macroolithus of the Elongatoolithidae by medium-sized eggs with average polar axis and equatorial diameter of 19.36 and 8.35 cm, and the ornamentation pattern of nodes and ridges on the outer surface. The new oogenus differs from Macroolithus in its prominent ridges 0.67 mm in height, about half of the entire eggshell thickness, gradational boundary between the cone layer and the overlying columnar layer, cone layer-to-columnar layer thickness ratio of 1/8 or 1/4. This discovery adds new data on the morphology and diversification of Late Cretaceous elongatoolithid ootaxa.

摘要

基于中国江西省萍乡盆地晚白垩世周田组的标本，描述了一种新的巨龙蛋科恐龙蛋属和种——彭氏波动蛋（Undulatoolithus pengi oogen. et oosp. nov.）。这些蛋略不对称，成对出现，在蛋窝内呈放射状排列成圆形。根据中等大小的蛋，平均极轴和赤道直径分别为19.36厘米和8.35厘米，以及外表面的瘤和脊的纹饰图案，最有可能属于巨龙蛋科的巨形蛋属（Macroolithus）。这个新的恐龙蛋属与巨形蛋属的区别在于其显著的脊高0.67毫米，约为整个蛋壳厚度的一半，锥层与上覆柱状层之间的渐变边界，锥层与柱状层厚度比为1/8或1/4。这一发现为晚白垩世巨龙蛋科恐龙蛋分类群的形态和多样性增添了新数据。