皖南晚白垩世恐龙蛋新类型

发布时间：2019-04-18 13:00

【摘要】：安徽黄山地区上白垩统徽州组中发现了恐龙蛋一新类型.根据蛋化石呈椭圆形,在蛋窝中沿长轴定向排列,不在同一层面,长径平均为13.86 cm,赤道直径平均为10.43 cm,形状指数为75.25;蛋壳外表面无纹饰,厚度平均为0.75 mm;壳单元整体呈降落伞形、三角形或锥形,排列疏密不均,锥体呈半球形,锥体层非常薄,平均厚度为0.12 mm,约为蛋壳厚度的1/6,柱状层近内表面和近外表面分别发育伞形结构;气孔道不规则等特征,区别于已发现的其他恐龙蛋类型,建立一新蛋属新蛋种——休宁伞形蛋(新蛋属,新蛋种)Umbellaoolithus xiuningensis oogen.et oosp.nov.;并建立一新蛋科——伞形蛋科(新蛋科)Umbellaoolithidae oofam.nov.这一发现不仅丰富了恐龙蛋类型的多样性,同时也为皖南地区晚白垩世红层的划分与对比提供了新的古生物证据.
[Abstract]:A new type of dinosaur eggs was found in Huizhou formation of Upper Cretaceous in Huangshan area, Anhui Province. According to the oval shape of the egg fossil, it is arranged along the long axis in the egg nest. The average length diameter is 13.86 cm, and the equatorial diameter is 10.43 cm, shape index is 75.25. The average length diameter is 13.86 cm, and the equatorial diameter is 10.43 cm, shape index. The outer surface of the eggshell is non-striped, with an average thickness of 0.75 mm;. The shell elements are parachute-shaped, triangular or tapered, densely arranged unevenly, the cone is hemispherical, the cone layer is very thin, the average thickness is about 0.12 mm, which is about 1 / 6 of the eggshell thickness. Umbrella structure was developed in the columnar layer near the inner surface and near the outer surface, respectively. Different from other dinosaur egg types, a new egg species of the genus) Umbellaoolithus xiuningensis oogen.et oosp.nov.; is established, which is a new egg species of the genus Cynthia (New Egg genus, New Egg species), which is characterized by irregular stomatal passage and so on, which is different from other dinosaur egg types already found. A new egg family, Umbellaoolithidae oofam.nov., was established. This discovery not only enriches the diversity of dinosaur egg types, but also provides new paleontological evidence for the division and correlation of late Cretaceous red beds in southern Anhui.
【作者单位】：安徽省地质博物馆;中国科学院脊椎动物演化与人类起源重点实验室中国科学院古脊椎动物与古人类研究所;中国科学院大学地球科学学院;
【基金】：国土资源部公益性行业科研专项(201511054) 国家自然科学基金(41672012,41688103) 安徽省公益性地质工作项目(2011-g-32)资助
【分类号】：Q915

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