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A new cordaitean pollen cone and pollen grains in situ from the Early Permian of Hexi Corridor and its geotectonic significance
Wang, Zixi1,2,3; Sun, Bainian1,2,3; Wang, Xuelian1,2; Chen, Yingquan1,2; Sun, Fankai1,2; Xiong, Conghui1,2,3
2016-12-01
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
Volume463Pages:261-274
AbstractA new species of cordaitean pollen cone is described and diagnosed from early Permian strata in Gansu Province, northwestern China. The gross morphology and well-preserved features of the species, named Cordaianthus yongchangensis Z. X. Wang et B. N. Sun sp. nov., have been studied in detail. The current fossil has helically arranged bracts and secondary fertile shoots. The bract, longer and wider than in other known fossils, diverges at approximately 90 from the axis; the secondary fertile shoots are obovate with scales on individual shoots, and fertile scales concentrated near the apex of the secondary fertile shoots. More than five pollen sacs are clustered on the fertile scales, which number 8-13. As the current species differs from any known species in the fossil records, it is considered as a new species of Cordaianthus. The species, with its microstructure of bracts and scales, in situ pollen sacs and pollen grains, provides important clues on the evolution of Cordaitopsida. Based on the known reproductive organs of cordaitean plants, we discovered that the current fossil, with its wide bracts that protect the helically arranged secondary fertile shoots, is similar to modern conifer cones, suggesting that the current fossil is an evolutionally advanced species. In comparisons with cordaitean fossils, the leaves of cordaitean plants from the ALT (Alashan Terrane) during the early Permian presented mixed leaf features of specimens from the NCB (North China Block) and SCB (South China Block). In conclusion, the ALT was already located between the NCB and SCB in the Early Permian. (C) 2016 Elsevier B.V. All rights reserved.
KeywordHexi Corridor Early Permian Cordaianthus Pollen cone Microstructure Geotectonic significance
DOI10.1016/j.palaeo.2016.10.014
Language英语
WOS KeywordNORTH CHINA BLOCK ; CORDAITALEAN SEED PLANTS ; RECONSTRUCTION
Funding ProjectSpecialized Research Fund for the National Natural Science Foundation of China[41172022] ; Fundamental Research Funds for the Central Universities[lzujbky-2016-202] ; Foundation of the State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, China Academy of Sciences[163117]
WOS Research AreaPhysical Geography ; Geology ; Paleontology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS IDWOS:000387526000020
Funding OrganizationSpecialized Research Fund for the National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Foundation of the State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, China Academy of Sciences
PublisherELSEVIER SCIENCE BV
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Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/12339
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, Nanjing Inst Geol & Paleontol, State Key Lab Paleobiol & Stratig, Beijing 100864, Peoples R China
Recommended Citation
GB/T 7714
Wang, Zixi,Sun, Bainian,Wang, Xuelian,et al. A new cordaitean pollen cone and pollen grains in situ from the Early Permian of Hexi Corridor and its geotectonic significance[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2016,463:261-274.
APA Wang, Zixi,Sun, Bainian,Wang, Xuelian,Chen, Yingquan,Sun, Fankai,&Xiong, Conghui.(2016).A new cordaitean pollen cone and pollen grains in situ from the Early Permian of Hexi Corridor and its geotectonic significance.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,463,261-274.
MLA Wang, Zixi,et al."A new cordaitean pollen cone and pollen grains in situ from the Early Permian of Hexi Corridor and its geotectonic significance".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 463(2016):261-274.
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