Pliocene taxodiaceous fossil wood from southwestern Ukraine and its palaeoenvironmental implications

作     者：Yi Tiemei Li Chengsen Svetlana Syabryaj 

作者机构：Beijing Institute of Science and Technology Information Laboratory of Systematic and Evolutionary BotanyInstitute of BotanyChinese Academy of Sciences Institute of Geological SciencesNational Academy of Sciences of Ukraine 

出 版 物：《Journal of Palaeogeography》 (古地理学报（英文版）)

年 卷 期：2013年第2卷第4期

页      面：362-368页

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 

基　　金：supported by the China and Ukraine cooperation fund of Chinese Academy Sciences and National Natural Science Foundation of China(No.31170206) 

主　　题：Late Pliocene gymnosperm conifer Sequoioxylon fossil wood Ukraine 

摘      要：Mineralized wood collected from Late Pliocene strata near Gorbki village in the Transcarpathian region of Beregovo Kholmogor’e in southwestern Ukraine was anatomically studied and *** wood possesses distinctive anatomical features and has distinct growth rings with an abrupt transition from early-to *** consists of tracheids with 1-3 seriate,dominating bi-seriate,opposite pits on the radial walls and taxodioid crossfield pitting,indentures *** are uni-seriate and 1 to 73 cells *** parenchyma horizontal walls thin and *** parenchyma distributed in early-and late-wood and is solitary and diffuse,with end walls nearly smooth or slightly *** combination of features observed in the wood indicates it belongs to the conifer family Taxodiaceae and is most similar to modern Sequoia and assigned to the fossil genus *** with species of Sequoioxylon show it is most similar to Sequoioxylon burejense,but ray tracheids were not found in our *** describe the specimens here as Sequoioxylon *** noting this *** Sequoia is distributed in the northern California coastal forest eco-region of northern California and southern Oregon in the United States where they usually grow in a unique environment with heavy seasonal precipitation(2500 mm annually),cool coastal air and fog *** study supplies magafossil evidence of Sequoioxylon as an element of the Late Pliocene forest community in Ukraine and indicates a climate with heavy seasonal precipitation and fog drip.