Systematic Relationship of a Corystosperms(Fengweioxylon)and its Palaeoecological SignificanceOA
The wood anatomy of corystosperms is fundamentally consistent with that of gymnosperms,yet their growth ring boundaries share anatomical features with extant angiosperms.This transitional morphology strongly supports the interpretation of corystosperms as an evolutionary intermediate between gymnosperms and angiosperms.The first application of X-Ray fluorescence(XRF)chemical analysis to fossil wood taxa of Fengweioxylon yielded the above conclusion.By using growth ring analysis and ecological reconstructions,we suggest that corystosperms were large evergreen trees with leaf retention periods of three to five years.They likely thrived in warm summer environments where prolonged foliage retention provided adaptive benefits.
JIANG Zikun;TIAN Ning;HAO Ruiying;WANG Yongdong;NING Zhenguo;WU Hao;SUN Deyu;WANG Cai
Chinese Academy of Geological Sciences,Key Laboratory of Stratigraphy and Palaeontology of the Ministry of Natural Resources,Beijing 100037,ChinaCollege of Palaeontology,Shenyang Normal University,Shenyang 110034,ChinaChinese Academy of Geological Sciences,Key Laboratory of Stratigraphy and Palaeontology of the Ministry of Natural Resources,Beijing 100037,ChinaNanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008,ChinaDepartment of Natural Resources of Shandong Province,Jinan 250014,ChinaZhejiang Museum of Natural History,Hangzhou 310014,ChinaJinzhou Zijing Paleontological Fossil Museum,Jinzhou,Liaoning 121000,ChinaJinzhou Zijing Paleontological Fossil Museum,Jinzhou,Liaoning 121000,China
生物科学
XRFcorystospermsgrowth ringpalaeoclimatephylogenetics
《Acta Geologica Sinica(English Edition)》 2026 (1)
P.13-19,7
supported by the National Natural Science Foundation of China(U2544204,42172034,42330208,42288201)the China Geological Survey Project(Grant Nos.DD20243469,DD20221829).
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