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A diverse organic-walled microfossil assemblage from the Mesoproterozoic Xiamaling Formation, North China
Miao, Lanyun(苗兰云)1,2; Moczydlowska, Malgorzata3; Zhu, Maoyan(朱茂炎)1,2,4
2021-07-15
Source PublicationPRECAMBRIAN RESEARCH
ISSN0301-9268
Volume360Pages:21
Abstract

The mid-Proterozoic (ca. 1.85-0.85 Ga) might have been environmentally "boring", but was a crucial interval of time for the early establishment of eukaryotic life on Earth. The Mesoproterozoic shale-dominated Xiamaling Formation (ca. 1.4-1.35 Ga) in North China preserved abundant organic-walled microfossils, some of which were of eukaryotic affinity but their taxonomic diversity and evolutionary implications remain unclear. In this paper, we present a palynological study of the lower Xiamaling Formation in the northern Tianjin Municipality. Similar to other Mesoproterozoic microbiotas, this assemblage consists of well-preserved and diverse spheroidal to ellipsoidal vesicles, filamentous microfossils and cellular aggregates. In total, 36 species belonging to 28 genera are identified, including 1 new species Quadrimurus clavatus gen. et sp. nov., and 5 unnamed forms. Majority of these taxa are recognised for the first time from this formation, indicating a richer assemblage than previously known. Although most taxa are of unknown biological affinities, this microbiota is thought to be composed of prokaryotic and eukaryotic microorganisms, in which 12 taxa are inferred to be eukaryotic. These microfossils indicate a moderate diversity of eukaryotic life documented in the Xiamaling Formation, which is consistent with other microbiotas in the mid-Proterozoic. The presence of Jixiania lineata Yan, 1986 (=Lineaforma elongata Vorob'eva and Sergeev, 2015) in North China extends its geographic distribution and further enhances its potential as index fossil for the early Mesoproterozoic strata. The Xiamaling assemblage provides one of the broader pictures of the Mesoproterozoic biosphere, in which eukaryotes were predominantly protistan-grade microorganisms.

KeywordEukaryote Organic-walled microfossil Mesoproterozoic Xiamaling Formation North China
DOI10.1016/j.precamres.2021.106235
Indexed BySCI
Language英语
WOS KeywordMAJOR EVOLUTIONARY TRANSITIONS ; GAOYUZHUANG FORMATION ; RUYANG GROUP ; MCARTHUR GROUP ; MICRO-FOSSILS ; OFFICER BASIN ; ALGAL MATS ; CRATON ; AGE ; SUPERGROUP
Funding ProjectNational Natural Science Foundation of China[41902018] ; National Natural Science Foundation of China[41921002] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB18000000] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB26000000]
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000654275400003
Funding OrganizationNational Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences
PublisherELSEVIER
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/38286
Collection中国科学院南京地质古生物研究所
Corresponding AuthorZhu, Maoyan(朱茂炎)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, 39 East Beijing Rd, Nanjing 210008, Peoples R China
3.Uppsala Univ, Dept Earth Sci, Palaeobiol, Villavagen 16, SE-75236 Uppsala, Sweden
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, 19 Yuquan Rd, 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
Miao, Lanyun,Moczydlowska, Malgorzata,Zhu, Maoyan. A diverse organic-walled microfossil assemblage from the Mesoproterozoic Xiamaling Formation, North China[J]. PRECAMBRIAN RESEARCH,2021,360:21.
APA Miao, Lanyun,Moczydlowska, Malgorzata,&Zhu, Maoyan.(2021).A diverse organic-walled microfossil assemblage from the Mesoproterozoic Xiamaling Formation, North China.PRECAMBRIAN RESEARCH,360,21.
MLA Miao, Lanyun,et al."A diverse organic-walled microfossil assemblage from the Mesoproterozoic Xiamaling Formation, North China".PRECAMBRIAN RESEARCH 360(2021):21.
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