KMS Nanjing Institute of Geology and Palaeonotology,CAS
A structurally preserved cycad-like stem, Lioxylon liaoningense gen. et. sp nov., from the Middle Jurassic in Western Liaoning, China | |
Zhang Wu; Wang Yongdong (王永栋); Saiki, Ken'ichi; Li Nan; Zheng Shaolin | |
2006 | |
发表期刊 | PROGRESS IN NATURAL SCIENCE |
ISSN | 1002-0071 |
卷号 | 16页码:236-248 |
摘要 | A cycad-like fossil stem, Lioxylon liaoningense gen. et sp. nov. is described based on structurally preserved material from the Jurassic in western Liaoning, China. The specimens consist of seven permineralized stems and occur from the Middle Jurassic Tiaojishan Formation in Changgao Town, Beipiao City, Liaoning Province. The stems are long and cylindrical to pyriform in shape. The apical part of the stem is covered with an armor composed of helically arranged petioles and cataphyll bases. The pith and cortex are large, consisting of medullary bundles, mucilage sacs, parenchyma, transfusion and sclerotic cells. They are surrounded by two rings of xylem cylinders, the inner one centripetal and the outer centrifugal. The vascular bundles in the petiole and cataphyll base consist of a two bundle series: one is arranged in an arc along the adaxial margin of the petiole and the cataphyll bases, and the other one is a poorly-developed omega or irregular shape and extends from the center to the abaxial side. This anatomical evidence indicates a close systematic affinity of Lioxylon with fossil and living Cycadales. This represents the first systematic description of an anatomically preserved fossil cycad-like stem in China. |
关键词 | Fossil Cycad Permineralized Stem Lioxylon LiaoninGen.e Gen. Et Sp Nov. Middle Jurassic Western Liaoning China |
语种 | 英语 |
关键词[WOS] | Fossil Plants ; Trunk ; Antarctica ; Argentina ; Ginkgo |
WOS研究方向 | Materials Science ; Science & Technology - Other Topics |
WOS类目 | Materials Science, Multidisciplinary ; Multidisciplinary Sciences |
WOS记录号 | WOS:000240034200021 |
出版者 | TAYLOR & FRANCIS LTD |
文献类型 | 期刊论文 |
条目标识符 | http://ir.nigpas.ac.cn/handle/332004/537 |
专题 | 中国科学院南京地质古生物研究所 |
通讯作者 | Wang Yongdong (王永栋) |
作者单位 | 1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China 2.Minist Natl Land & Resources, Shenyang Inst Geol & Mineral Resources, Shenyang 110032, Peoples R China 3.Shenzhen Xianhu Bot Garden, Shenzhen 518004, Peoples R China 4.Nat Hist Museum & Inst, Chiba, Japan |
推荐引用方式 GB/T 7714 | Zhang Wu,Wang Yongdong ,Saiki, Ken'ichi,et al. A structurally preserved cycad-like stem, Lioxylon liaoningense gen. et. sp nov., from the Middle Jurassic in Western Liaoning, China[J]. PROGRESS IN NATURAL SCIENCE,2006,16:236-248. |
APA | Zhang Wu,Wang Yongdong ,Saiki, Ken'ichi,Li Nan,&Zheng Shaolin.(2006).A structurally preserved cycad-like stem, Lioxylon liaoningense gen. et. sp nov., from the Middle Jurassic in Western Liaoning, China.PROGRESS IN NATURAL SCIENCE,16,236-248. |
MLA | Zhang Wu,et al."A structurally preserved cycad-like stem, Lioxylon liaoningense gen. et. sp nov., from the Middle Jurassic in Western Liaoning, China".PROGRESS IN NATURAL SCIENCE 16(2006):236-248. |
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