Yangquanoxylon miscellum gen. nov et sp nov., a gymnospermous wood from the Upper Pennsylvanian-lower Permian Taiyuan Formation of Yangquan City, Shanxi Province, with reference to the palaeoclimate in North China
Yangquanoxylon miscellum gen. nov et sp nov., a gymnospermous wood from the Upper Pennsylvanian-lower Permian Taiyuan Formation of Yangquan City, Shanxi Province, with reference to the palaeoclimate in North China
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阳泉木杂种
DOI：
10.1016/j.palaeo.2017.04.022
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Jun Wang
中科院分区：
文献类型：
--
作者：
Mingli Wan;Wan Yang;Xuezhi He;Weiming Zhou;Lujun Liu;Jun Wang
本文报道了一种硅化裸子植物--羊泉木（Yangquanoxylon miscellum gen.nov.et sp. nov.）山西阳泉上盆统-下二叠统太原组地层中发现了一个新化石。密木由厚壁管胞和薄壁射线组成。其特征是管胞径向纹孔混合，射线单列且均匀，出现梯状径向纹孔，交叉纹孔类型多样。Y染色体交叉斑蚀有四种类型。miscellum gen. nov. et sp. nov.，包括简单类、类杉类、叶状枝类和南洋杉类。在这里描述的化石木和以前报道的华北地区没有生长轮，这表明在晚宾夕法尼亚-早二叠世期间气候潮湿，降水变化极小。
A silicified gymnospermous wood, Yangquanoxylon miscellum gen. nov. et sp. nov., is described from the Upper Pennsylvanian-lower Permian Taiyuan Formation, Yangquan City, Shanxi Province, North China. The pycnoxylic wood is composed of thick-walled tracheids and thin-walled rays. It is characterized by mixed radial tracheid pits, uniseriate and homogeneous rays, occurrence of scalariform radial pitting, and various types of cross-field pitting. There are four types of cross-field pitting in Y. miscellum gen. nov. et sp. nov., including simple, taxodioid, phyllocladoid, and araucarioid. The absence of growth rings within fossil woods described here and reported previously from North China suggests a humid climate with minimal precipitation variations during the Late Pennsylvanian-early Permian.