NIGPAS OpenIR
Ultrastructure and in-situ chemical characterization of intracellular granules of embryo-like fossils from the early Ediacaran Weng'an biota
Sun, Weichen(孙玮辰)1,2,3; Yin, Zongjun(殷宗军)1,2,7; Liu, Pengju4; Donoghue, Philip C. J.5; Li, Jinhua6; Zhu, Maoyan(朱茂炎)1,2,7
2021-12-06
Source PublicationPALZ
ISSN0031-0220
Pages11
Abstract

Embryo-like fossils from the early Ediacaran Weng'an biota provide a window of exceptional fossil preservation onto the period of life history in which molecular clocks estimate the fundamental animal lineages to have diverged. However, their diversity and biological affinities have proven controversial, because they are morphologically simple and, consequently, their interpretation lacks phylogenetic constraint. The subcellular structures preserved in these embryo-like fossils might help to understand their cytology, biology, and diversity, but the potential of these structures has not been fully realized, because detailed microscale physical and chemical investigations are lacking. Here, to remedy this deficiency, we performed a comprehensive study to characterize their micro- and ultra-structures as well as in-situ chemical components. Our results reveal three types of subcellular structure that differ in size, shape, and mineral components: (1) relatively small and spheroidal granules in embryo-like fossils with equal cell division pattern; (2) relatively large, spheroidal, or polygonal granules in embryo-like fossils with unequal and asynchronous cell division pattern; and (3) irregular multi-layered rim-bounded granules in embryo-like fossils with unequal and asynchronous cell division pattern. We propose that the three types may be rationalized to a single taphonomic pathway of preferential mineralization of the cell cytoplasm, preserving an external mould of subcellular granules. We followed the previous interpretation that the spheroidal and polygonal granules should be fossilized lipid droplets or yolk platelets. The distinction between these subcellular structures are largely the result of postmortem degradation processes such as autolysis. The widely preserved lipid droplets or yolk platelets within these Ediacaran embryo-like fossils are compatible with the interpretion of large yolky embryos with maternal nourishment and direct development.

KeywordEdiacaran Weng'an biota Megasphaera Subcellular structure Taphonomy
DOI10.1007/s12542-021-00597-0
Indexed BySCI
Language英语
WOS KeywordGIANT SULFUR BACTERIA ; DOUSHANTUO FORMATION ; ANIMAL EMBRYOS ; EXPERIMENTAL TAPHONOMY ; ORIGIN ; PRESERVATION ; MICROFOSSILS ; LAGERSTATTE ; GUIZHOU ; NUCLEI
Funding ProjectStrategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS)[XDB26000000] ; National Natural Science Foundation of China[42022010] ; National Natural Science Foundation of China[41921002] ; CAS Interdisciplinary Innovation Team[JCTD-2020-18] ; Youth Innovation Promotion Association of the CAS ; Natural Environment Research Council (NERC) grant, Biosphere Evolution, Transitions and Resilience (BETR) programme - Natural Science Foundation of China (NSFC)[NE/P013678/1]
WOS Research AreaPaleontology
WOS SubjectPaleontology
WOS IDWOS:000727129600001
Funding OrganizationStrategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; National Natural Science Foundation of China ; CAS Interdisciplinary Innovation Team ; Youth Innovation Promotion Association of the CAS ; Natural Environment Research Council (NERC) grant, Biosphere Evolution, Transitions and Resilience (BETR) programme - Natural Science Foundation of China (NSFC)
PublisherSPRINGER HEIDELBERG
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/40202
Collection中国科学院南京地质古生物研究所
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.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Peoples R China
3.Univ Sci & Technol China, Hefei 230026, Peoples R China
4.Chinese Acad Geol Sci, Inst Geol, Beijing 100043, Peoples R China
5.Univ Bristol, Sch Earth Sci, Life Sci Bldg,Tyndall Ave, Bristol BS8 1TQ, Avon, England
6.Chinese Acad Sci, Innovat Acad Earth Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
7.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Sun, Weichen,Yin, Zongjun,Liu, Pengju,et al. Ultrastructure and in-situ chemical characterization of intracellular granules of embryo-like fossils from the early Ediacaran Weng'an biota[J]. PALZ,2021:11.
APA Sun, Weichen,Yin, Zongjun,Liu, Pengju,Donoghue, Philip C. J.,Li, Jinhua,&Zhu, Maoyan.(2021).Ultrastructure and in-situ chemical characterization of intracellular granules of embryo-like fossils from the early Ediacaran Weng'an biota.PALZ,11.
MLA Sun, Weichen,et al."Ultrastructure and in-situ chemical characterization of intracellular granules of embryo-like fossils from the early Ediacaran Weng'an biota".PALZ (2021):11.
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