早寒武世宽川铺生物群中<i>Punctatus</i>卵裂胚胎化石的发现及其意义

李勇; 郑亚娟; 刘云焕; 郭俊峰; 郑曦; 刘联群

doi:10.3799/dqkx.2012.096

Volume 37 Issue 5

Sep. 2012

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Article Navigation > Earth Science > 2012 > 37(5): 869-877

LI Yong, ZHENG Ya-juan, LIU Yun-huan, GUO Jun-feng, ZHENG Xi, LIU Lian-qun, 2012. Discovery of Cleavage Punctatus Embryos Fossils from Early Cambrian Kuanchuanpu Biota. Earth Science, 37(5): 869-877. doi: 10.3799/dqkx.2012.096

Citation:

LI Yong, ZHENG Ya-juan, LIU Yun-huan, GUO Jun-feng, ZHENG Xi, LIU Lian-qun, 2012. Discovery of Cleavage Punctatus Embryos Fossils from Early Cambrian Kuanchuanpu Biota. Earth Science, 37(5): 869-877. doi: 10.3799/dqkx.2012.096

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Discovery of Cleavage Punctatus Embryos Fossils from Early Cambrian Kuanchuanpu Biota

doi: 10.3799/dqkx.2012.096

College of Earth Science and Resources, Chang'an University, Xi'an 710054, China

Received Date: 2011-09-15
Available Online: 2021-11-10
Publish Date: 2012-09-15

Abstract

Abstract

The rich phosphatized embryo fossils and a large number of small shelly fossils were found from Early Cambrian Kuanchuanpu biota in the southern Shaanxi Province. So far, only embryonic fossils of the different development stages after blastosphere have been found in the embryo fossils previously reported, with the absence of fossils of transgene embryo. This paper presents many new specimens of cleavage embryos fossils in Kuanchuanpu biota, ranging from four cells, 64 cells, 128 cells, 512 cells to classification of cells without embryo fossils of cells, as well as a number of fossil specimens developed during blastosphere period, the original embryo stage and different bowel hatch larval stage, which constituted the integrated developmental sequence of embryo from single cells (Olivooides) to blastocysts, the original embryo, and then to bowel hatch larval cone (Punctatus). The variations of these cell fossils in numbers, forms, arrangement and blastocysts cavity can be compared to those in the Wen'an biota of Guizhou belonging to Ediacaran. In addition, they can also be compared to the cleavage embryos of living Cnidaria. Here, the fossils found for the first time complement specimens of embryo fossils in Kuanchuanpu biota and reveal developmental process of Olivooides embryos. Moreover, new specimens can also provide evidences to reveal genetic relationship and early evolution of the metazoan.
- the Early Cambrian,
- cleavage stage,
- embryo fossils,
- biota

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References(55)

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Discovery of Cleavage Punctatus Embryos Fossils from Early Cambrian Kuanchuanpu Biota

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