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Buxus Leaves from the Oligocene of Guangxi, China and Their Biogeographical Significance
Ma Fujun1,2,3,4,5; Wang Qiujun1,2; Dung Junling1,2; Yang Yi1,2; Wang Wenjia1,2; Yan Defei1,2; Sun Bainian1,2,3,5
2015-10-01
Source PublicationACTA GEOLOGICA SINICA-ENGLISH EDITION
ISSN1000-9515
Volume89Issue:5Pages:1453-1469
AbstractThe present paper reports two new species of Buxus from the Oligocene Ningming Formation of Guangxi, South China, on the basis of several compressed fossil leaves. Buxus ningmingensis sp. nov. is characterized by an elliptic to ovate shape; pinnate venation with marginal secondary, long hairs on the adaxial side of the midvein base; and amphistomatic, anomocytic stomata with a prominent outer ring. All of these characteristics suggest a closest affinity to the living Buxus microphylla subsp. sinica. Another new species identified as Buxus preaustro-yunnanensis sp. nov. is characterized by the diagnostic formation of its admedially branched tertiaries, the trunks of which are often strongly thickened by sclereides. This species is most similar to the extant Buxus austro-yunnanensis. The co-occurrence of Buxus ningmingensis sp. nov. and Buxus preaustro-yunnanensis sp. nov. suggests that these two Buxus lived during the Oligocene under a warm, tropical to subtropical climate, similar to the current climate of Ningming. Our findings provide the earliest fossil evidence of Buxus leaves with detailed illustrations of leaf architectural and cuticular features. The occurrence of these two species indicates that Buxus began to diversify in Guangxi no later than the Oligocene.
KeywordBuxus diversification paleoclimate Oligocene Guangxi
Language英语
WOS KeywordFOSSIL POLLEN RECORDS ; SOUTH CHINA ; EXTANT ANGIOSPERMS ; MIOCENE ; LEAF
Funding ProjectNational Basic Research Program of China (973 Program)[2012CB822003] ; Key Laboratory of Petroleum Resources, Gansu Province[SZDKFJJ20150603] ; National Natural Science Foundation of China[41172022] ; National Natural Science Foundation of China[41272026] ; Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, CAS[Y421140303] ; Fundamental Research Funds for the Central Universities[lzujbky-2014-285]
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000364726900004
Funding OrganizationNational Basic Research Program of China (973 Program) ; Key Laboratory of Petroleum Resources, Gansu Province ; National Natural Science Foundation of China ; Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, CAS ; Fundamental Research Funds for the Central Universities
PublisherWILEY-BLACKWELL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/21769
Collection中国科学院南京地质古生物研究所
Corresponding AuthorSun Bainian
Affiliation1.Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China
2.Lanzhou Univ, Key Lab Mineral Resources Western China Gansu Pro, Lanzhou 730000, Peoples R China
3.Chinese Acad Sci, Key Lab Petr Resources Gansu Prov, Lanzhou 730000, Peoples R China
4.Guizhou Normal Coll, Sch Geog & Tourism, Guiyang 550018, Peoples R China
5.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Key Lab Econ Stratig & Palaeogeog, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Ma Fujun,Wang Qiujun,Dung Junling,et al. Buxus Leaves from the Oligocene of Guangxi, China and Their Biogeographical Significance[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2015,89(5):1453-1469.
APA Ma Fujun.,Wang Qiujun.,Dung Junling.,Yang Yi.,Wang Wenjia.,...&Sun Bainian.(2015).Buxus Leaves from the Oligocene of Guangxi, China and Their Biogeographical Significance.ACTA GEOLOGICA SINICA-ENGLISH EDITION,89(5),1453-1469.
MLA Ma Fujun,et al."Buxus Leaves from the Oligocene of Guangxi, China and Their Biogeographical Significance".ACTA GEOLOGICA SINICA-ENGLISH EDITION 89.5(2015):1453-1469.
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