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Occurrence of Sciadopitys-like fossil wood （Coniferales） in the Jurassic of western Liaoning and its evolutionary implications

ISSN号：0469-5097
期刊名称：《南京大学学报：自然科学版》
时间：0
分类：P311[天文地球—固体地球物理学;天文地球—地球物理学] Q914.21[天文地球—古生物学与地层学;生物学—古生物学]
作者机构：[1]Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China, [2]Shenyang Center of China Geological Survey, Shenyang Institute of Geology and Mineral Resources, Shenyang 110034, China, [3]Graduate University of Chinese Academy of Sciences, Beijing 100049, China
相关基金：We thank Prof Zhou Zhiyan （NIGPAS. Nanjing） for carefully reading the manuscript and providing suggestions for improvements. Dr. Mao Limi （NIGPAS, Nanjing）, Dr. KazuoTerada （Fukui Prefectural Dinosaur Museum, Japan） and Dr. Marc Philippe （Universit（ Claude-Bernard Lyan 1, France） are thanked for providing references and Dr. Zhang Yi （Shenyang Normal University） for help with photography. This work was supported by the Knowledge Innovation Program of Chinese Academy of Sciences （KZCX-2-YW-154）, the National Basic Research Program of China （2012CB822000 and 2006CB701401）, the National Natural Science Foundation of China （40972008, 40472004 and J0930006） and UNESCO- lUGS Project IGCP 506.

作者： JIANG ZiKun[1,3], WANG YongDong[1], ZHENG ShaoLin[2,4], ZHANG Wu[1], TIAN Ning[4]

关键词：演化历史, 化石木, 辽宁西部, 侏罗系, 次生木质部, 类似, 木材解剖, 木材鉴定, conifer, Sciadopityaceae, anatomical structure, Tiaojishan Formation, Middle Jurassic, western Liaoning

中文摘要：

类 Sciadopitys，包含单个种(S。verticillata ) ，是家庭 Sciadopityaceae (Coniferales ) 的唯一的现存代表，并且是显著生活石块。尽管一些叶状的石块被归功于到 Sciadopityaceae，有与这个家庭的一种靠近的亲密关系的石块木部材料是很稀罕的，并且在那里，没有石块被发现了，它为木头鉴定是很重要的显示出木髓和主要木部结构。因此，在地质的时间在 sciadopityaceous 植物使用石块木头解剖进化的理解是困难的。在我们简短在象 Sciadopitys 一样上报导的这笔记，石块木头在西方的辽宁的中间的侏罗记发现了，它忍受保存得很好的 Protosciadopityoxylon 类型第二等的木部，内始式的主要木部和异构的木髓。这是有木头结构的如此的详细保藏的 Sciadopityaceae 的石块标本的第一份报告。发现为重建提供精确解剖证据进化历史和 Sciadopityaceae 的地理分发，以及在北中国贡献侏罗记扬劳·弗洛拉的石块差异的理解。

英文摘要：

The genus Sciadopitys, containing a single species （S. verticillata）, is the only extant representative of the Family Sciadopityaceae （Coniferales）, and is a remarkable living fossil. Although some leafy fossils have been ascribed to Sciadopityaceae, fossil xylem material with a close affinity to this family is very rare, and there have been no fossils found showing both pith and primary xylem structures, which are of great importance for wood identification. Thus, it has been difficult to use fossils for the understanding of wood anatomy evolution in the sciadopityaceous plants over geological time. In this note we briefly report on Sciadopitys-like fossil wood found in the Middle Jurassic of western Liaoning, which bears well-preserved Protosciadopityoxylon-type secondary xylem, endarch primary xylem and heterogeneous pith. This is the first report of fossil specimens of the Sciadopityaceae with such detailed preservation of wood structures. The discovery provides precise anatomical evidence for reconstructing the evolu- tionary history and geographical distribution of Sciadopityaceae, as well as contributing to understanding of the fossil diversity of the Jurassic Yanliao Flora in northern China.

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