Zalesskioxylon xiaheyanense sp. nov., a gymnospermous wood of the Stephanian (Late Pennsylvanian) from Ningxia, northwestern China

Zhuo Feng; Jun Wang; Guang-Long Shen

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Zalesskioxylon xiaheyanense sp. nov., a gymnospermous wood of the Stephanian (Late Pennsylvanian) from Ningxia, northwestern China

机译：Zalesskioxylon xiaheyanense sp。十一月，一种来自中国西北宁夏的Stephanian（晚宾夕法尼亚州）的裸子植物木材

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摘要

A new Late Pennsylvanian species of gymnospermous fossil wood, Zalesskioxylon xiaheyanense sp. nov. is described from the Lower Taiyuan Formation (Stephanian B-C) near the village of Xiaheyan, Ningxia Hui Autonomous Region, northwestern China. The specimen consists only of silicified secondary xylem. The tracheids are pycnoxylic with 2-3 seriate bordered pits, arranged in subcircular or hexagonal alternate (araucaroid) pattern. The pores of the pits are small, linear, and regularly tilted. Xylem rays are homogeneous, unise-riate, 1-25 cells high. Cross-fields are filled with numerous mixed simple pits of various sizes. Growth rings, axial parenchymatous elements and resin canals are absent. The geographic distribution of Zalesskioxylon woods is reviewed. Zalesskioxylon xiaheyanense sp. nov. grew at low latitudes, and because of the lack of growth rings, probably lived under relatively uniform climatic conditions. Our new species supplements the poorly known distribution of Carboniferous wood in China.

机译：宾夕法尼亚州的一种新的裸子植物化石种Zalesskioxylon xiaheyanense sp。十一月在中国西北部的宁夏回族自治区下河堰村附近的太原下层组（斯蒂芬尼时代的B-C）中描述。标本仅由硅化的次生木质部组成。气管是具有2-3个锯齿状带边凹坑的pycnoxylic，排列成亚圆形或六边形的交替（阿拉伯类）图案。凹坑的孔小，呈线性且规则倾斜。木质部射线是均匀的，单一的，高1-25个细胞。交叉场充满了各种大小不同的混合简单坑。没有生长环，轴向薄壁组织和树脂管。 Zalesskioxylon木材的地理分布进行了审查。 Zalesskioxylon xiaheyanense sp。十一月它生长在低纬度地区，并且由于缺少年轮，因此可能生活在相对统一的气候条件下。我们的新物种补充了在中国石炭纪鲜为人知的分布。

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来源
《Journal of Asian earth sciences》 |2008年第4期|p.219-228|共10页
作者
Zhuo Feng; Jun Wang; Guang-Long Shen;
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作者单位

LPS, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, PR China;

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正文语种 eng
中图分类天文学、地球科学;
关键词
fossil wood; zalesskioxylon xiaheyanense sp. nov.; late pennsylvanian; Ningxia Hui Autonomous Region; PR China;

机译：化石;zalesskioxylon xiaheyanense sp。十一月;宾夕法尼亚州;宁夏回族自治区;

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Zalesskioxylon xiaheyanense sp. nov., a gymnospermous wood of the Stephanian (Late Pennsylvanian) from Ningxia, northwestern China

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