EARLY EVOLUTION OF PRIMITIVE ANGIOSPERMS IN CRETACEOUS

白垩纪原始被子植物的早期演化

• 批准号: 12640683
• 负责人: TAKAHASHI Masamichi
• 金额: $ 1.92万
• 依托单位: NIIGATA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640683/
• 关键词: CRETACEOUS; ANGIOSPERMS; EARLY EVOLUTION; MESOFOSSILS; PALAEOBOTANY; CORNACEAE; FUTABA GROUPS; FLOWER FOSSILS; クスノキ科

A preliminary description is provided of a new assemblage of plant fossils(the Kamikitaba mesofossil flora) from the Asamigawa Member of the Ashizawa Formation(lower Coniacian, Upper Cretaceous) exposed in Kamikitaba, Fukushima Prefecture, northeastern Honshu, Japan. The fossils are small, three-dimensional and charcoalified or lignitized(mesofossils) and yield exquisite structural details when studied with scanning electron microscopy. The Kamikitaba assemblage comprises the first record of this style of fossil plant preservation from the Cretaceous of eastern Asia. The flora complements and extends current knowledge of Cretaceous fossil plants from Japan and provides a basis for comparison with similar mesofossil assemblages from eastern North America and Europe. The fossil assemblage contains well-preserved angiosperm flowers, fruits, seeds, leaf fragments and wood, as well as shoots, leaves, pollen cones, cone scales and seeds of conifers. Extant taxa that can be recognized provisionally include : Lauraceae, Hamamelidaceae, Fagaceae, Cornales, Combretaceae, and probably Ericales, Magnoliaceae, Nymphaeales and Taxodiaceae. Leaf and rachis fragments of ferns, sporangia with in situ spores, and megaspores also document the presence of Selaginellaceae and Schizaeaceae.

本文初步描述了日本本州东北部福岛县神北町出露的阿希泽组(上白垩统科尼亚西统下部)Asamigawa组中的一组新的植物化石(Kamikitaba Mesofossil植物群)。这些化石很小，是三维的，木炭化或木质化(中化石)，扫描电子显微镜研究时会产生精致的结构细节。Kamikitaba组合包括东亚白垩纪这种类型的植物化石保存的第一个记录。植物群补充和扩展了日本白垩纪植物化石的现有知识，并为与北美东部和欧洲类似的中化石组合进行比较提供了基础。化石组合包括保存完好的被子植物花、果实、种子、树叶碎片和木材，以及树枝、树叶、花粉球果、球果鳞片和针叶树种子。现有的可暂时识别的分类群包括：樟科、金缕梅科、壳斗科、山茱蒲科、鸡冠花科，可能还有杜鹃花科、木兰科、睡莲科和杉科。蕨类植物的叶和轴碎片、具有原位孢子的孢子囊和大孢子也证明了卷柏和五倍子科的存在。

项目成果

Blackmore,S.Takahashi,M.and Uehara,K: "A preliminary phylogenetic analysis of sporogenesis in Pteridophytes."Pollen and Spores ; Morphology and Biology, Harley, C.M.Morton and S.Blackmore (eds.).. 109-124 (1999)

Blackmore，S.Takahashi，M. 和 Uehara，K：“蕨类植物孢子发生的初步系统发育分析。”花粉和孢子；

Takahashi, M., P.R.Crane, H.Ando: "Fossil megaspores of the Marsilealses and Selaginellales from the upper Coniacian to lower Santonian (Upper Cretaceous) of the Tamagawa Formation"Int.Jour.Plant Science.. 162. 431-439 (2001)

Takahashi, M., P.R.Crane, H.Ando：“玉川组从上科尼亚阶到下桑托阶（上白垩纪）的马西尔和卷柏目化石大孢子”Int.Jour.Plant Science.. 162. 431-439（

Takahashi, M., Herendeen, P.R., Peter R.Crane: "Lauraceous fossil flower from the Kamikitaba Locality(Lower Coniacian, Upper Cretaceous) in northeastern Japan"Journal of Plant Research. 114. 429-434 (2001)

Takahashi, M.、Herenden, P.R.、Peter R.Crane：“来自日本东北部上北田地区（下科尼亚阶，上白垩纪）的月桂花化石”植物研究杂志。

Takahashi, M., Crane, P.R., Manchester, S.R.: "Hironoia fusiformis gen.et sp.Nov ; a cornalean fruits from the Kamikitaba locality(Upper Cretaceous, Lower Coniacian) in northeastern Japan"J.Plant Res. 115. 463-473 (2002)

Takahashi, M.、Crane, P.R.、Manchester, S.R.：“Hironoia fusiformis gen.et sp.Nov；来自日本东北部 Kamikitaba 地区（上白垩纪，下 Coniacian）的玉米果实”J.Plant Res。

Nowicke, J.W., Takahashi.M.: "Pollen morphology, exine structure and systematics of Acalyphoideae(Euphorbiaceae), Part 4, Tribes Acalypheae pro parte and discussion and summary of the complete subfamily."Rev.Paleobot.Palynol.. 121. 231-336 (2002)

Nowicke, J.W., Takahashi.M.：“Acalyphoideae（大戟科）的花粉形态、外壁结构和系统学，第 4 部分，Acalypheae 部落以及完整亚科的讨论和总结。”Rev.Paleobot.Palynol.. 121. 231