A biomechanical analysis of the early eukaryotic fossil Valeria and new occurrence of organic-walled microfossils from the Paleo-Mesoproterozoic Ruyang Group

doi:10.1016/j.palwor.2015.04.002

	A biomechanical analysis of the early eukaryotic fossil Valeria and new occurrence of organic-walled microfossils from the Paleo-Mesoproterozoic Ruyang Group
	Ke Pang (庞科); Qing Tang (唐卿); Xunlai Yuan (袁训来); Bin Wan (万斌); Shuhai Xiao (肖书海)
	2015
发表期刊	Palaeoworld
卷号	24 期号:3 页码:251–262
摘要	The Paleo-Mesoproterozoic Ruyang Group of North China hosts early eukaryotic fossils such as Dictyosphaera, Shuiyousphaeridium, and Valeria, and thus offers valuable insights into the early evolution of single-celled eukaryotic life. In this paper, we report several additional forms of organic-walled microfossils from the Ruyang Group, includingPlicatidium latum, Spiromorpha sp., and an unnamed form. V. lophostriata from the Ruyang Group is investigated using transmitted light microscopy, scanning electron microscopy, transmission electron microscopy, and biomechanical analysis. V. lophostriata is reconstructed as a spherical vesicle with two hemispherical halves bearing concentric striations resembling latitudinal circles. The formation of striations could be explained using the Belousov-Zhabotinsky reaction model or the Turing reaction-diffusion model. A biomechanical analysis using the thin-walled spherical pressure vessel model suggests that the concentric striations of V. lophostriata may have functioned as a mechanism to guide biologically programmed excystment through medial split. Our analysis provides essential paleontological data to better understand the functional biology and life cycles of early eukaryotes such as Valeria.
关键词	Eukaryote Valeria Functional Morphology Paleo-mesoproterozoic Ruyang Group North China
DOI	10.1016/j.palwor.2015.04.002
WOS记录号	WOS:000362152100001
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/11948
专题	中国科学院南京地质古生物研究所其他
推荐引用方式 GB/T 7714	Ke Pang ,Qing Tang ,Xunlai Yuan ,et al. A biomechanical analysis of the early eukaryotic fossil Valeria and new occurrence of organic-walled microfossils from the Paleo-Mesoproterozoic Ruyang Group[J]. Palaeoworld,2015,24(3):251–262.
APA	Ke Pang ,Qing Tang ,Xunlai Yuan ,Bin Wan ,&Shuhai Xiao .(2015).A biomechanical analysis of the early eukaryotic fossil Valeria and new occurrence of organic-walled microfossils from the Paleo-Mesoproterozoic Ruyang Group.Palaeoworld,24(3),251–262.
MLA	Ke Pang ,et al."A biomechanical analysis of the early eukaryotic fossil Valeria and new occurrence of organic-walled microfossils from the Paleo-Mesoproterozoic Ruyang Group".Palaeoworld 24.3(2015):251–262.