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New Olivooides-like Embryos with Protuberances from the Early Cambrian Kuanchuanpu Formation in Ningqiang County, Shaanxi Province(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2010年第04期
Page:
350-
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
New Olivooides-like Embryos with Protuberances from the Early Cambrian Kuanchuanpu Formation in Ningqiang County, Shaanxi Province
Author(s):
HOU Xiao-jin1;  HAO Ya-qing1;  YAO Xiao-yong1;  HAN Jian1;  LI Yong2;  LIU Yun-huan2
(1. Department of Geology, Northwest University, Xi'an 710069, Shaanxi, China; 2. School of Earth Sciences and Resources, Chang'an University, Xi'an 710054, Shaanxi, China)
Keywords:
fossil embryos;  Punctatus;  Meishucunian Stage;  Kuanchuanpu Formation;  Shaanxi Province
PACS:
Q913.2
DOI:
-
Abstract:
The Cambrian small shelly fossils, which were diversified from the first episode of Cambrian life's explosion(Meishucunian Stage)in South China, were critical for understanding the origin of metazoans. Two specimens, which were the new types of Olivooids-like fossilized animal embryos, were recognized from a large amount of globular fossils at the first assemblage zone of Cambrian small shelly fossils from the Early Cambrian Kuanchuanpu Formation in Kuanchuanpu Region of Ningqiang County, Shaanxi Province. The embryos were characterized by numerous cone-like protuberances with spiral folds at the proximal part and distal smooth top end just beneath the egg shell, and remarkably different from those of typical or non-typical stellate spines of Punctatus Emeiensis. The diversity of eggs and embryos presented at the Meishucunian Stage were most likely rooted in the Neoproterozoic Ediaranian.

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Last Update: 2010-12-20