| 黑龙江渐新世银杏大化石及其古气候和植物地理意义 |
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| 引用本文： | 全成,周志炎. 黑龙江渐新世银杏大化石及其古气候和植物地理意义[J]. 古生物学报, 2010, 49(4) |
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| 作者姓名： | 全成 周志炎 |
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| 作者单位： | 吉林大学东北亚生物演化与环境教育部重点实验室,长春,130026;中国科学院南京地质古生物研究所现代古生物学和地层学国家重点实验室,南京,210008;中国科学院南京地质古生物研究所现代古生物学和地层学国家重点实验室,南京,210008 |
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| 基金项目： | 国家重点基础研究发展计划(编号:2006CB701401;2006CB806400); 国家自然科学基金(编号:41002004); 中国博士后科学基金(编号:20090451258); 高等学校博士学科点专项科研基金(编号:200801831115)资助 |
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| 摘 要： | 首次报道我国渐新世银杏属植物叶化石。化石采自黑龙江汤原县太平川剖面宝泉岭组,角质层保存状态良好。叶为下气孔式。上表皮细胞垂周壁平直,平周壁较平。下表皮大量气孔器不规则地散布于脉间区,形成气孔带;气孔密度约为117个/mm2;气孔器为单环式,保卫细胞下陷,侧副卫细胞角质化强烈并形成乳突。当前材料的形态及显微构造特征与古近纪北半球广泛分布的铁线蕨型银杏Ginkgo adiantoides(Ung.)Heer emend.Flo-rin(auctorum multorum)基本一致。这是我国目前已知年代最新的银杏大化石记录,对于探究银杏属在我国新生代的分布、迁徙以及当时相关的古植物地理和气候环境等具有重要意义。
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| 关 键 词： | 银杏 角质层 宝泉岭组 渐新世 黑龙江 |
OCCURRENCE OF OLIGOCENE GINKGO MEGAFOSSILS FROM HEILONGJIANG PROVINCE AND ITS PALEOPHYTOGEOGRAPHIC SIGNIFICANCE |
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| QUAN Cheng ,) , ZHOU Zhi-yan ) ) Key-Lab for Evolution of Past Life , Environment in Northeast Asia,MOE,Jilin University,Changchun ,) State Key Laboratory of Palaeobiology , Stratigraphy,Nanjing Institute of Geology , Palaeontology,Chinese Academy of Sciences,Nanjing. OCCURRENCE OF OLIGOCENE GINKGO MEGAFOSSILS FROM HEILONGJIANG PROVINCE AND ITS PALEOPHYTOGEOGRAPHIC SIGNIFICANCE[J]. Acta Palaeontologica Sinica, 2010, 49(4) |
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| Authors: | QUAN Cheng ) ZHOU Zhi-yan ) ) Key-Lab for Evolution of Past Life Environment in Northeast Asia MOE Jilin University Changchun ) State Key Laboratory of Palaeobiology Stratigraphy Nanjing Institute of Geology Palaeontology Chinese Academy of Sciences Nanjing |
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| Affiliation: | QUAN Cheng 1,2) and ZHOU Zhi-yan 2) 1) Key-Lab for Evolution of Past Life and Environment in Northeast Asia,MOE,Jilin University,Changchun 130026,2) State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008 |
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| Abstract: | For a long time,there is no record of post-Eocene Ginkgo megafossils in China. In the present short note,Ginkgo leaves are reported for the first time from the Oligocene. The fossil leaves,with well-preserved cuticle,were collected from Tai-pingchuan section of Baoquanling Formation of Tangyuan County,Heilongjiang Province. The leaf is hypostomatic. In the upper cuticle,the anticlinal walls of epidermal cells are straight,and the periclinal walls are flat. In the lower cuticle,plenty of stomata randomly dis... |
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| Keywords: | Ginkgo cuticle Baoquanling Formation Oligocene Heilongjiang |
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