Ufadendron elongatum sp. nov., an Angaran Lycopsid from the Upper Permian of Inner Mongolia, China
Ufadendron elongatum sp. nov., an Angaran Lycopsid from the Upper Permian of Inner Mongolia, China
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长叶乌花木 sp.
DOI：
10.1007/s12583-019-1230-0
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发表时间：
2019-06
影响因子：
3.3
通讯作者：
Huang Junhao
中科院分区：
文献类型：
--
作者：
Tang Zhen;Zhang Yi;Naugolnykh Serge V;Zheng Changqing;Shi Lu;Qin Tao;Huang Junhao
本文报道了一新种，长枝单枝草Ufadendron elongatum，sp. nov.属于TomiodendraceaNaugolnykh科，在研究中的收集中以两个保存完好的茎为代表。该新种是最近在内蒙古扎赉特地区上二叠统林西组中发现的。该属植物叶垫长，呈纺锤形，叶痕小而圆，叶垫上部有一中心点痕;叶下囊位于叶垫中部，呈纺锤形;叶垫侧部和下部的翅和叶踵发达。新种与模式种U. ufaense（Naugolnykh 2014），采集自安加拉兰西部边界的顺乌拉尔早二叠世，长叶垫和明显的叶踵。值得注意的是，维管束（传导束）占据了中心点状疤痕的中间部分。在中国安加拉区的石松类中，迄今为止只发现了5个安加拉成分属。新种U. elongatum的发现不仅丰富了我们对Tomiodendraceae石松类的分类学知识，而且为了解安加拉和华夏植物群在古气候背景下的差异提供了机会。
A new species Ufadendron elongatum sp. nov., attributed to the family Tomiodendraceae Naugolnykh, is represented by two well-preserved stems in the collection under study. This new species was recently discovered from the Upper Permian Linxi Formation in the Jalaid locality, the Inner Mongolia Autonomous region, China. The genus Ufadendron is characterized as having the long fusiform leaf cushions, with small and rounded leaf scar containing a central point-like scar which is situated at the upper part of leaf cushion; the infrafoliar bladder of fusiform shape positioned in the middle part of leaf cushion; the wings and heel well-developed in the lateral parts and the lower part of leaf cushion, respectively. The new species is different from the type species U. ufaense (Naugolnykh 2014) collected from the Lower Permian of the Cis-Urals, western limits of Angaraland, in the elongated leaf cushion and in the well-pronounced heel. It should be noted, that a vascular bundle (conductive strand) occupied the middle part of the central point-like scar. So far, only 5 genera of Angaran elements among lycopsids have been discovered in the region geographically belonging to Angaran Realm (Phytogeoprovince) in China. The new species U. elongatum not only enlarges our knowledge on the taxonomy of Tomiodendraceae lycopsids, and also provides an opportunity to understand the difference between Angaran and Cathaysian floras in paleoclimatic context.
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DOI：
--
发表时间：
2006
期刊：
--
影响因子：
--
作者：
W. Jun
通讯作者：
W. Jun
影响因子：
3.3
作者：
A. Baud
通讯作者：
A. Baud
影响因子：
--
作者：
Wang Jun-tao
通讯作者：
Wang Jun-tao
影响因子：
1.9
作者：
W. G. Chaloner;Klaus U. Leistikow;A. Hill
通讯作者：
W. G. Chaloner;Klaus U. Leistikow;A. Hill
DOI：
--
发表时间：
1981
期刊：
Scripta Geologica
影响因子：
--
作者：
S. Archangelsky;C. L. Azcuy;R. Wagner
通讯作者：
S. Archangelsky;C. L. Azcuy;R. Wagner