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《Acta Geologica Sinica》 2018-06
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A New Record of Early Cretaceous Petrified Wood with Fungal Infection in Xinchang,Zhejiang Province

ZHU Zhipeng;LI Fengshuo;XIE Aowei;TIAN Ning;WANG Yongdong;College of Palaeontology,Shenyang Normal University;State Key Laboratory of Palaeobiology and Stratigraphy;University of Chinese Academy of Sciences;  
The Lower Cretaceous Guantou Formation is considered as one of the few and significant horizons hosting Cretaceous petrified fossil woods in southern China.This study reports a well-preserved petrified wood with fungal infection found in the Guantou Formation in Xinchang, Zhejiang Province.Anatomically,the fossil wood is characterized by distinct growth rings(araucarian radial pitting,araucarioid cross-field pits,and uniseriate xylem rays).The fossil wood from Xinchang has similar anatomical characters as the extant Araucariaceae,and thus can be referred as to the genus Agathoxylon Hartig.Considering that the identification of Agathoxylonat species level is confused and problematic,the new fossil wood material is tentatively ascribed as Agathoxylon sp. Well-preserved fungal remains,represented by fungal hyphae with typical clamp-connection,were found within the fossil wood tissue.The occurrence of clamp-connection indicates that the fungal remains systematically belong to the Basidiomycota.The typical wood decay feature of the wood fossil resembles that of the extant white-rot,indicating that the current fungal remains should be white-rotting fungi.The finding of Agathoxylonsp.in the XInchang region further enriches the fossil wood diversity of the Guantou Formation,improving our understanding of the composition features of the Early Cretaceous fauna in southern China.The fungal remains represent the first record of the Cretaceous wood rotting fungi in southern China,and provide new fossil evidence for revealing the plant-fungal interaction in the Early Cretaceous forest ecosystem.
【Fund】: 国家自然科学基金项目(编号41302004 41402004和41572014);; 中国科学院先导项目(XDB18000000&XDPB05);; 现代古生物学和地层学国家重点实验室开放课题(173124);; 辽宁省教育厅基本科研项目(LQN201718)资助
【CateGory Index】: Q914
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