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Cellular preservation of excysting developmental stages of new eukaryotes from the early Ediacaran Weng' an Biota
Landon, Emma N. U.1; Liu, Peng-Ju2; Yin, Zong-Jun (殷宗军)3,4; Sun, Wei-Chen (孙玮辰)3,4,5; Shang, Xiao-Dong2; Donoghue, Philip C. J.1
2019-12-01
Source PublicationPALAEOWORLD
ISSN1871-174X
Volume28Issue:4Pages:461-468
Abstract

The Ediacaran Weng' an Biota provides a unique window on marine diversity during the interval in which the fundamental animal body plans were being established. Here we describe a previously unreported component of the assemblage, millimeter-scale encysted spheres that exhibit a characteristic but simple slit-shaped excystment mechanism (Sporosphaera guizhouensis n. gen. n. sp.), reminiscent of acritarchs. The cysts contain a large inner body or numerous small discrete membrane-bounded bodies. It is possible that the inner bodies represent disaggregated cells of a multicellular body, like an embryo, but there is no evidence to support this interpretation and the occurrence of the excystment structure is not readily compatible with an embryo interpretation. Rather, we interpret the encysted organisms as multicellular stages within the lifecycle of otherwise probably unicellular eukaryotes. The developmental mode exhibited by Sporosphaera, incorporating a resting stage, implies an adaptation to adverse environmental conditions. This parallels the appearance of Large Ornamented Ediacaran Microfossils (LOEMs) which have been interpreted as diapause stages in the embryology of early animals. Sporosphaera is distinct from LOEMs by ornamentation instead of size, which may implicate that not all LOEMs are animal embryos, if any. (C) 2019 Elsevier Ireland Ltd Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. Published by Elsevier B.V. All rights reserved.

KeywordWeng' an Biota Ediacaran Acritarch Eukaryote Excystment mechanism
DOI10.1016/j.palwor.2019.05.005
Language英语
WOS KeywordEMBRYO-LIKE FOSSILS ; ANIMAL EMBRYOS ; DOUSHANTUO FORMATION ; ORIGIN ; MICROFOSSILS ; EVOLUTION ; NUCLEI
Funding ProjectNERC Thematic Grant[NE/P013678/1] ; Royal Society Newton Advanced Fellowship ; NERC GW4+ DTP Studentship ; National Natural Science Foundation of China[41672013] ; National Natural Science Foundation of China[41572016] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2017360]
WOS Research AreaPaleontology
WOS SubjectPaleontology
WOS IDWOS:000499969100004
Funding OrganizationNERC Thematic Grant ; Royal Society Newton Advanced Fellowship ; NERC GW4+ DTP Studentship ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/29417
Collection中国科学院南京地质古生物研究所
Corresponding AuthorYin, Zong-Jun (殷宗军); Donoghue, Philip C. J.
Affiliation1.Univ Bristol, Sch Earth Sci, Life Sci Bldg,Tyndall Ave, Bristol BS8 1TQ, Avon, England
2.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
4.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Jiangsu, Peoples R China
5.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Landon, Emma N. U.,Liu, Peng-Ju,Yin, Zong-Jun ,et al. Cellular preservation of excysting developmental stages of new eukaryotes from the early Ediacaran Weng' an Biota[J]. PALAEOWORLD,2019,28(4):461-468.
APA Landon, Emma N. U.,Liu, Peng-Ju,Yin, Zong-Jun ,Sun, Wei-Chen ,Shang, Xiao-Dong,&Donoghue, Philip C. J..(2019).Cellular preservation of excysting developmental stages of new eukaryotes from the early Ediacaran Weng' an Biota.PALAEOWORLD,28(4),461-468.
MLA Landon, Emma N. U.,et al."Cellular preservation of excysting developmental stages of new eukaryotes from the early Ediacaran Weng' an Biota".PALAEOWORLD 28.4(2019):461-468.
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