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Tingia unita sp. nov. （Noeggerathiales） with strobilus from the Lower Permian of Wuda, Inner Mongolia, China

ISSN号：0705-3797
期刊名称：《地质幕：英文版》
时间：0
分类：Q91[天文地球—古生物学与地层学;生物学—古生物学]
作者机构：[1]LPS, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China
相关基金：Acknowledgements The author is grateful to Dr. I. M. van Waveren from the National Museum of Natural History of the Netherlands for her critical comments and especially the linguistic editorial help. I would like to acknowledge the critical comments of Prof. Zhou Zhiyan and three anonymous reviewers of the article, which benefited a lot for the current research, although the author could not accept all the com- ments from a reviewer. This study was supported by the National Natural Science Foundation of China （Grant Nos. 40572008 and 40321202）, the Major Basic Research Project （Grant No. 2006CB806400） of Ministry of Science and Technology of China, and the State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, CAS （Grant No. 053101）.

作者： WANG Jun[1]

关键词：瓢叶目, 早二叠纪, 内蒙古, 化石, Tingia unita sp. nov., Noeggerathiales, Early Permian, Inner Mongolia.

中文摘要：

最近从 Wuda 的早二叠的 ShanxiFormation 收集的很多个标本，内部蒙古证明叶状的射击和球果我们统一 sp.nov 的 Tingia ，是从普通的茎发芽的两个，并且因而改进我们这神秘的税的整个植物形态学的理解在上 Cathaysian 植物群。球果 i 是像柱体的， 1.7 - 在直径的 2.5 厘米和在长度的超过 20 厘米，与基础梗 7-8，在宽度的公里和大约 7 厘米渴望。孢子叶是轮生的，与近似在锭盘的 8-10。在每枚孢子叶的近轴的方面上，孢蒴被依附。球果我们是多孔的异种，小孢子具有 thePunctatisporites 类型。大叶子变化从对有全部侧面的边缘的长方形线性但是稍微在顶的 lobed。小叶子通常与大叶子一样但是许多更狭窄。整个植物可能是有叶状的射击和 strobiliforming 的一棵小树状的树一个王冠，而非有当以前理解，漂浮在水的表面上的更大的叶子的水植物。新种类的特征赞成靠近的亲密关系 betweenTingia Halle 和 Noeg-gerathiales，并且因此 Noeg-gerathiales toProgymnospermophyta 的亲密关系。

英文摘要：

A number of specimens recently collected from the Early Permian Shanxi Formation of Wuda, Inner Mongolia demonstrate that the leafy shoot and strobilus of Tingia unita sp. nov. are both sprouting from a common stem, and consequently improve our understanding of the whole plant morphology of this enigmatic taxon of the Cathaysian flora. The strobili are cylinder-like, 1.7-2.5 cm in diameter and over 20 cm in length, with a basal stalk 7-8 mm in width and about 7 cm long. Sporophylls are verticillate, with approximately 8-10 in a whorl. On the adaxial side of each sporophyU a sporangium is attached. The strobilus is heterosporous and the microspores are of the Punctatisporites type. Large leaves vary from linear to oblong with entire lateral margins but are slightly lobed at the apex. Small leaves are generally the same as the large leaves but much narrower. The whole plant is probably a small arborescent tree with leafy shoots and strobili forming a crown, rather than a water plant with larger leaves floating on the surface of the water as previously understood. Features of the new species are in favor of the close affinity between Tingia Halle and Noeggerathiales, and accordingly the affinity of Noeggerathiales to Progymnospermophyta.

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