Ductoagathoxylon jimsarensis gen. nov. et sp. nov., a gymnospermous stem from the Wuchiapingian (upper Permian) Wutonggou Formation in the Junggar Basin, northern Bogda Mountains, northwestern China
Ductoagathoxylon jimsarensis gen. nov. et sp. nov., a gymnospermous stem from the Wuchiapingian (upper Permian) Wutonggou Formation in the Junggar Basin, northern Bogda Mountains, northwestern China
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吉姆萨伦管木
DOI：
10.1016/j.revpalbo.2017.02.004
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发表时间：
2017
影响因子：
1.9
通讯作者：
Jun Wang
中科院分区：
文献类型：
--
作者：
Mingli Wan;Wan Yang;Lujun Liu;Jun Wang
硅化茎，Ductoagathoxylon jimsarensis Wan, Yang, Liu et Wang gen.十一月等11月，描述于中国西北部新疆维吾尔自治区吉木萨尔县大龙口剖面五家坪阶（晚二叠世）五通沟组。它由髓、初生木质部和次生木质部组成。茎的特征是具有分组的分泌管和细胞的实心异细胞髓、中生初生木质部的末端和Agathoxylon型次生木质部。根据Agathoxylon型次生木质部以及髓部分泌管和细胞的出现，表明Ductoagathoxylon具有针叶树亲和性。它为中国西北部乌家坪亚班加拉植物区系的生物多样性提供了额外的证据。吉姆萨伦木和其他先前报道的准噶尔盆地五通沟组化石木材的年轮和假年轮表明环境胁迫和降水季节性引起的季节和季节内生长变化。化石茎记录表明，五家坪阶期间，博格达山北部的大龙口地段和博格达山南部约70公里的塔龙-桃洞沟地段之间存在着不同的气候和环境条件。
A silicified stem, Ductoagathoxylon jimsarensis Wan, Yang, Liu et Wang gen. nov. et sp. nov., is described from the Wuchiapingian (late Permian) Wutonggou Formation from the Dalongkou section, Jimsar County, Xinjiang Uygur Autonomous Region, northwestern China. It is composed of a pith, and primary and secondary xylem. The stem is characterized by a solid, heterocelluar pith with grouped secretory ducts and cells, an end- to mesarch primary xylem, and an Agathoxylon-type secondary xylem. Based on the Agathoxylon-type secondary xylem and the occurrence of secretory ducts and cells in the pith, it is suggested that Ductoagathoxylon is of a coniferous affinity. It provides additional evidence for the biodiversity of the Wuchiapingian Subangaran flora in northwestern China. Growth rings and false rings in D. jimsarensis and other previously reported fossil woods from the Wutonggou Formation in the Junggar Basin indicate both seasonal and intra-seasonal growth variations caused by environmental stress and precipitation seasonality. The fossil stem records suggest varying climatic and environmental conditions between the Dalongkou section in the northern Bogda Mountains and the Tarlong-Taodonggou sections, about 70 km to the south, in the southern Bogda Mountains during the Wuchiapingian.