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Meroblastic cleavage identifies some Ediacaran Doushantuo (China) embryo-like fossils as metazoans
Yin, Zongjun (殷宗军)1; Zhu, Maoyan (朱茂炎)1; Bottjer, David J.2; Zhao, Fangchen (赵方臣)1; Tafforeau, Paul3
2016-09-01
Source PublicationGEOLOGY
ISSN0091-7613
Volume44Issue:9Pages:735-738
Abstract

Ediacaran Doushantuo (Formation) embryo-like fossils (EDEFs, ca. 600 Ma) from South China display cellular and sub-cellular structures and provide a unique window on the early evolution of multicellular eukaryotes. But there have been widely disparate interpretations of these fossils. Here we report new fossil embryo-like forms from the Doushantuo phosphorite that exhibit a meroblastic cleavage pattern. Our results from high-resolution propagation phase contrast-synchrotron radiation X-ray microtomography (PPC-SR mu CT) demonstrate that these fossils preserve features directly comparable to those of modern meroblastic animal embryos that utilize discoidal cleavage. Given that discoidal-type meroblastic cleavage occurs only in metazoans, the phylogenetic positions of these fossils probably fall into the animal branch of the holozoan tree. Meroblastic as well as holoblastic cleavage forms were thus present by ca. 600 Ma, substantiating the conclusion derived from molecular clock estimates that a variety of metazoan lineages had evolved by the mid-Ediacaran after the termination of the Marinoan glaciation, if not earlier.

DOI10.1130/G38262.1
Language英语
WOS KeywordAnimal Embryos ; Southwest China ; Wengan ; Eukaryotes ; History ; Life
Funding ProjectMinistry of Science and Technology of China[2013CB835000] ; Chinese Academy of Sciences[XDB18030304] ; National Natural Science Foundation of China[41302003]
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000382522700012
Funding OrganizationMinistry of Science and Technology of China ; Chinese Academy of Sciences ; National Natural Science Foundation of China
PublisherGEOLOGICAL SOC AMER, INC
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/12307
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorYin, Zongjun (殷宗军)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
2.Univ Southern Calif, Dept Earth Sci, Los Angeles, CA 90089 USA
3.European Synchrotron Radiat Facil, 71 Ave Martyrs, F-38000 Grenoble, France
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Yin, Zongjun ,Zhu, Maoyan ,Bottjer, David J.,et al. Meroblastic cleavage identifies some Ediacaran Doushantuo (China) embryo-like fossils as metazoans[J]. GEOLOGY,2016,44(9):735-738.
APA Yin, Zongjun ,Zhu, Maoyan ,Bottjer, David J.,Zhao, Fangchen ,&Tafforeau, Paul.(2016).Meroblastic cleavage identifies some Ediacaran Doushantuo (China) embryo-like fossils as metazoans.GEOLOGY,44(9),735-738.
MLA Yin, Zongjun ,et al."Meroblastic cleavage identifies some Ediacaran Doushantuo (China) embryo-like fossils as metazoans".GEOLOGY 44.9(2016):735-738.
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