KMS Nanjing Institute of Geology and Palaeonotology,CAS
Ginkgoalean ovulate organs and seeds associated with Baiera furcata-type leaves from the Middle Jurassic of Qinghai Province, China | |
Wu, XG; Yang, XJ (杨小菊); Zhou, ZY (周志炎) | |
2006-04-01 | |
发表期刊 | REVIEW OF PALAEOBOTANY AND PALYNOLOGY |
ISSN | 0034-6667 |
卷号 | 138期号:3-4页码:209-225 |
摘要 | Ginkgoalean ovulate organs Yimaia, detached seeds and the associated Baiera-type leaves are described from a paper coal at the uppermost part of the Middle Jurassic Shimengou Formation in the northern border of the Qaidam Basin, Qinghai Province, Northwest China. The organ bears a cluster of at least 3 orthotropous ovules at the apex of a peduncle. The seeds (ovules) are sessile, nearly rounded or broadly ovate to oblong, about 7 mm long and 5.7 mm wide, with ail obtusely acute, acute or mucronate apex. Despite a general resemblance in gross morphology, the new Yimaia organ is distinguished from other species of the genus ill the stomatal structure of the integument. Associated leaf segments of Baiera bear a resemblance to the Yorkshire Middle Jurassic species B.furcata, but are somewhat different in cuticular structure. Selected Mesozoic leaves with well-preserved cuticle and other Baiera type leaves that are known to have been associated with the Yimaia-type ovulate organs from China and other parts of the world are found to be different either in gross morphology and/or in cuticular structure from the present associated leaf segments. Yimaia ovulate organs and vegetative leaves dominantly of the Baiera-type appear to form a regular combination in the Mesozoic ginkgoaleans. They represented a rather small, but coherent plant group (Yimaiaceae) that was widely distributed in the Jurassic of Eurasia. (c) 2006 Elsevier B.V. All rights reserved. |
关键词 | Ginkgoales Middle Jurassic Ovulate Organs Vegetative Leaves Northwest China |
DOI | 10.1016/j.revpalbo.2006.01.009 |
语种 | 英语 |
关键词[WOS] | Ultrastructure |
WOS研究方向 | Plant Sciences ; Paleontology |
WOS类目 | Plant Sciences ; Paleontology |
WOS记录号 | WOS:000237401200004 |
出版者 | ELSEVIER SCIENCE BV |
文献类型 | 期刊论文 |
条目标识符 | http://ir.nigpas.ac.cn/handle/332004/567 |
专题 | 中国科学院南京地质古生物研究所 其他 |
通讯作者 | Zhou, ZY (周志炎) |
作者单位 | Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China |
第一作者单位 | 中国科学院南京地质古生物研究所 |
通讯作者单位 | 中国科学院南京地质古生物研究所 |
推荐引用方式 GB/T 7714 | Wu, XG,Yang, XJ ,Zhou, ZY . Ginkgoalean ovulate organs and seeds associated with Baiera furcata-type leaves from the Middle Jurassic of Qinghai Province, China[J]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY,2006,138(3-4):209-225. |
APA | Wu, XG,Yang, XJ ,&Zhou, ZY .(2006).Ginkgoalean ovulate organs and seeds associated with Baiera furcata-type leaves from the Middle Jurassic of Qinghai Province, China.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,138(3-4),209-225. |
MLA | Wu, XG,et al."Ginkgoalean ovulate organs and seeds associated with Baiera furcata-type leaves from the Middle Jurassic of Qinghai Province, China".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 138.3-4(2006):209-225. |
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