检索结果-南通市图书馆

Earliest megafossils of scandent calamoid palms from the Deccan Intertrappean Beds of Central India and their paleobiogeographic implications

引用

Journal of Palaeogeography 2024年第3期13卷 509-527页

作者： Sanchita Kumar Kaustav Roy Robert A.Spicer Mahasin Ali Khan palaeobotany and Palynology Laboratory Department of BotanySidho-Kanho-Birsha UniversityRanchi RoadPurulia-723104India CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303Yunnan ProvinceChina School of Environment Earth and Ecosystem SciencesThe Open UniversityMilton KeynesMK76AAUK State Key Laboratory of Tibetan Plateau Earth System Resources and Environment(TPESRE)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China

Two well-preserved petrified palm stems from the latest Maastrichtian(Late Cretaceous) to earliest Danian(Early Paleocene) sediments of the Deccan Intertrappean Beds of Madhya Pradesh, Central India are described. Their significant anatomical characteristics include a Calamus-type general stem pattern,the presence of well-preserved fibrovascular bundles(fvbs) with two wide metaxylem vessel elements(230 μm-250 μm) and one phloem strand, uniform density of fvbs, lack of continuity between protoxylem and metaxylem vessel elements, and an absence of centrifugal differentiation of sclerenchymatous fibrous *** features reveal a close resemblance to those of extant genera of scandent Calamoideae. The permineralized stems are described as a new species namely, Palmoxylon calamoides Kumar, Roy et Khan sp. *** fossils represent the oldest reliable fossil records of this family, supporting their Gondwanan origin, their importance in tracing their migration pathways from India to Europe and other continents after the docking of the Indian subcontinent with Eurasia during the Paleocene, and an “Out-of-India” dispersal hypothesis. Today the subfamily Calamoideae is disjunctly occurred in Africa, Asia, Australia, Europe, and South America, but the poor deep-time fossil record of this subfamily with a small number of Cenozoic fossils makes hypotheses concerning its origin and dispersal difficult to evaluate. The present study has significant implications for the origin and migration of this subfamily and the paleoclimate.

关键词： Scandent Calamoideae Stem anatomy K-Pg Paleobiogeography Paleoclimate Central India

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Man-environment interaction and its impact since ca. 3600 years BP in West Bengal, India: A multiproxy approach

引用

科学通报 2013年第S1期58卷 9-28页

作者： GHOSH Ruby BERA Subir BANERJEE Manju Birbal Sahni Institute of palaeobotany Centre of Advanced Study Palaeobotany-Palynology LaboratoryDepartment of BotanyUniversity of Calcutta

Climatic variability during the Holocene and corresponding anthropogenic response have gained considerable attention in different parts of India, but surprisingly very little is known on climate-human interrelationship from eastern India especially from the Gangetic plains of West Bengal. As climate has played significant role behind the collapse of many of the ancient human civilizations hence, to explore the reason behind the abandonment of any archaeological site, understanding of the climate of the contemporaneous past is a prerequisite. Agricultural development, subsistence strategies and dynamic behavior of climate in the Lower Gangetic plains of West Bengal since ca. 3600 cal a BP(Chalcolithic period) and post-Chalcolithic period(ca. 2350–2120 cal a BP to recent) were explored using multiproxy approach including plant-animal macro remains, wood charcoals and pollen and non-pollen palynomorphs from an archaeological site at Pakhanna, district Bankura in West Bengal, India. Evidences from palynological and phytolith data suggest that a warm-moist tropical climate during ca. 3600 cal a BP supported the spread of a village farming community in this part of lower Gangetic plains of West Bengal who practiced double-cropping as evidenced by the recovery of cereals(rice) and pulses(black gram) from the cultural deposits of Chalcolithic and Early Historic periods. In addition, a plenty of animal remains(opercula of carp fishes, fragments of plastron of Indian Soft Shelled Turtle, Indian Flap Shelled Turtle, ramus of mandible with teeth of Indian Boar) from similar cultural deposits indicate their probable inclusion in dietary list. The climate started changing during the onset of Early Historic period ca. 2350 cal a BP as revealed by pollen and phytolith proxies and became warmer and drier than that in earlier phase which is continuing till recent. The observations of palynological and phytolith data were also corroborated by the results of correspondence analysis(CA)

关键词： Archaeobiology dynamic environment human settlement Late Quaternary West Bengal India

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Further contribution to the Neogene petrified wood forest of Mizoram, India

引用

科学通报 2013年第S1期58卷 104-110页

作者： MEHROTRA Rakesh Chandra TIWARI R P SRIVASTAVA Gaurav SHUKLA Anumeha Birbal Sahni Institute of palaeobotany department of Geology Mizoram University

Mizoram, a state situated in the northeast corner of India, is very rich in fossil woods belonging to the Tipam Group(Late Miocene-Early Pliocene in age). Four new fossil woods, namely Swintonioxylon hailakandiense Prakash & Tripathi, Bombacacioxylon tertiarum Mehrotra et al., gen. et sp. nov., Dipterocarpoxylon jammuense Guleria et al. and Bischofia palaeojavanica Awasthi are described from there. They resemble the modern taxa, namely Swintonia Griff.(Anacardiaceae), Dipterocarpus C.F. Gaertn.(Dipterocarpaceae), Bischofia Blume(Euphorbiaceae) and the taxa of the family Bombacaceae. The distribution of the modern equivalents of the present and previously described taxa indicates the existence of warm and humid climate in Mizoram during the depositional time.

关键词： fossil wood Tipam Group angiosperms northeast India palaeoclimate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Diversity of Middle Eocene Coralline Red Algae from the Prang Limestone(Shella Formation) of Jaintia Hills, Meghalaya, NE Himalaya, India with special emphasis on palaeoenvironment

引用

科学通报 2013年第S1期58卷 118-125页

作者： GHOSH Amit Kumar SARMA Ajanta SARKAR Suman Birbal Sahni Institute of palaeobotany department of Geology GC College

Palaeocene-Eocene carbonates of shallow marine sequence belonging to Shella Formation of Jaintia Group are well developed in the south of the Jaintia Hills, Meghalaya and represent an excellent outcrop of shelf sediments in North Eastern Himalaya, India. These outcrops are exposed along the southern fringe of Shillong Plateau. The Prang Limestone is the uppermost lithostratigraphic unit of the Shella Formation within the Jaintia Group. It is overlain by sand-shale alternation of the Kopili Formation and underlain by the Narpuh Sandstone. A rich assemblage of larger foraminifera including Nummulites, Discocyclina etc. has been recorded earlier from the Prang Limestone and based on the foraminiferal assemblage, a Middle Eocene to Early Late Eocene age has been assigned to the Prang Limestone. Thin section analysis of the Prang Limestone revealed the abundance of well preserved coralline red algae along with other well preserved and significant biogenic elements. Morpho-taxonomical study reveals that the algal flora is represented by seven species belonging to the families Hapalidiaceae(Subfamily: Melobesioideae), Corallinaceae(Subfamily: Mastophoroideae) and Sporolithaceae. The dominance of melobesioid and mastophoroid forms is the characteristic feature of this algal assemblage. Coralline algae occur mostly in encrusting growth form with orbitoid foraminifera and occasionally the coralline algae form rhodoliths. On this basis of algal forms it can be inferred that they thrived in a shallow, warm, shelf environment of normal salinity.

关键词： diversity Coralline algae taxonomy Middle Eocene Shella Formation Meghalaya NE Himalaya India

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Endemic fossil seed plants from China and a reassessment of coniferophyte phylogeny

引用

Progress in Natural Science:Materials International 1999年第10期9卷 48-55页

作者： Jason HILTON,王士俊,陈之端,田宝霖 department of palaeobotany Institute of Botany Chinese Academy of Sciences Beijing 100093 China department of palaeobotany Institute of Botany Chinese Academy of Sciences Beijing 100093 China Laboratory of Systematics and Evolution Institute of Botany Chinese Academy of Sciences Beijing 100093 China China University of Mining and Technology ( Beijing) Beijing 100083 China

Recent palaeobotanical studies have provided new and important evidence on Chinese fossil plants. The majority of these fossils are distinct from fossil floras known from other geographical regions. However, remarkably few of these fossil plants have been successfully incorporated into cladistic analyses, to assess their importance on evolutionary relationships among major plant groups. For the first time our investigation incorporates three endemic Chinese fossil plant species into a cladistic analysis of the seed plants. These plants have been documented and reconstructed in detailed investigations of Palaeozoic coal balls from the Taiyuan Formation and are named Shanxioxylon sinensis , Shanx-ioxylon taiyuanensis and Pennsylvanioxylon tianii respectively. Previous investigations indicate that these plants belong to the now extinct Cordaitalean seed plants although they share many features with certain fossil conifers. As such, they are likely to be of significance to the ongoing and currently unresolv

关键词： phytogeny evolution coniferophyte Coniferales Cordaitales

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

First record of Cercidiphylloxylon (Cercidiphyllaceae) from the Palaeocene of Fushun,NE China

引用

Journal of Systematics and Evolution 2010年第4期48卷 302-308页

作者： Dmitry GROMYKO Albert G.ABLAEV department of palaeobotany Komarov Botanical InstituteRussian Academy of Sciences V.I.Il'ichev Pacific Oceanological Institute Far Eastern BranchRussian Academy of Sciences

Cercidiphylloxylon spenceri(Brett)Pearson is described from the Lizigou Formation,Palaeocene in *** growth rings are distinct;pores are diffuse,solitary,with somewhat angular outlines in cross section;vessel elements long with long scalariform perforation plates;intervessel pitting is opposite to scalariform;fibertracheids are present;axial parenchyma is scarce;rays are mostly biseriate and *** wood characters of the fossil specimen fall into the range of those of extant Cercidiphyllum(Cercidiphyllaceae).The finding is one of the earliest fossil wood records of Cercidiphyllaceae.

关键词： Cercidiphylloxylon Cercidiphyllum fossil wood Fushun Palaeocene

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Noeggerathiales as coal-forming plants in Cathaysia:conclusions from an Early Permian vegetational Pompeii in Inner Mongolia

引用

Chinese Science Bulletin 2014年第23期59卷 2785-2792页

作者： Jun Wang Hermann W.Pfefferkorn Zhuo Feng State Key Laboratory of Palaeobiology and Stratigraphy and department of palaeobotany and Palynology Nanjing Institute of Geology and PalaeontologyChinese Academy of Sciences department of Earth and Environmental Science University of PennsylvaniaPhiladelphiaPA 19104-6316USA Yunnan Key Laboratory for Palaeobiology Yunnan University

Noeggerathiales are an extinct group of sporebearing plants of uncertain systematic position that are known from Carboniferous and Permian age Euramerican and Cathaysian floras that occurred in present-day Europe,North America,and East *** order Noeggerathiales includes over 50 species of more than 20 fossil genera,but their paleoecology is not well understood *** this group had been found only in extrabasinal floras or those inhabiting clastic *** have never been recorded in coal ball ***,it is up to now uncertain whether this group has contributed to the formation of *** investigations of an Early Permian peat-forming flora of the Taiyuan Formation near Wuda,Inner Mongolia,which was preserved in a volcanic ash fall has provided evidence that noeggerathialean plants not only existed in the peat-forming vegetation but could even be the dominant group in some areas of the coal *** Noeggerathiales in this particular peat-forming forest include Tingia unita,Paratingia wudensis,and a new species of *** well-preserved specimens indicate that these noeggerathialean plants are small trees with a canopy of compound leaves and strobili near the top of an unbranched(monocaulous)stem.

关键词：华夏植物群早二叠世内蒙古植被二叠纪石炭纪古生态菌群

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Plant Remains from an Archaeological Site as Indicators of Vegetation and Agricultural Practice Between(3 320±400) and(2 080±80) yr BP in Gangetic West Bengal,India

引用

Journal of Integrative Plant Biology 2006年第6期48卷 628-641页

作者： Ruby Ghosh Subir Bera Ashalata D'Rozario Manju Banerjee Supriyo Chakraborty department of Botany University of Calcutta 35 Ballygunge Circular RoadKolkata 700019India Narasinha Dutt College 129 Bellilious Road Howrah 711101India Radiocarbon Dating Laboratory Birbal Sahni Institute of palaeobotany 53 University RoadLucknow 226007India

Diverse plant remains recovered from an archaeological site of Chslcollthlc-Early Historic age in the Bhalrabdanga area of Pakhanna （latitude 23°25′N, longitude 87°23′E）, situated on the west bank of the Damodar river, Bankura district, West Bengal, India, include food grains, wood charcoals, and palynomorphs. Radiocarbon dating of the recovered biological remains reveal the age of the site as （3 320 ± 400） to （2 080± 80） yr BP. The food grains were Identified as Oryza sativa L. and Vigna mungo L, and seeds of Brassica cf. campestris L. were also found; these indicate the agricultural practice and food habits of the ancient people living at Pakhanna from the Chalcolithlc to the Early Historic period. Sediments Including plant remains have been broadly divided into two zones, considering archaeological findings and radiocarbon dating. Analysis of the plant remains （I.e, wood charcoals and palynomorphs） in addition to cultivated food grains has revealed that a rich vegetation cover existed in this area, with a prevailing tropical and humid climate, comprising the timber-yielding plants Shores sp., Terminalia sp., and Tamarindus sp., with undergrowths of diverse shrubs and herbs during the Chalcolithic period （zone I） dated （3 320 ± 400） yr BP. Comparatively poorer representation and frequency of plant remains Indicate a drier climate during the Early Historic period （zone Ⅱ） dated as （2 110 ± 340） to （2 080 ± 80） yr BP. Comparisons of the archaeobotanical data recovered from the Chalcollthic and Early Historic period and also a principle components analysis Indicate a change In the climate of the area from tropical and humid at （3 320 ± 400） yr BP to tropical and drier conditions at （2 110 ± 340） to （2 080 ± 80） yr BP. The present-day tropical, dry deciduous vegetation of the area suggests that climate change has occurred in the area since the contemporaneous past. The plant remains database has been utilized to reconstruct the settlement pattern of the community livi

关键词： agriculture archaeological site culture, India Pakhanna, plant remains vegetation West Bengal.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Compaction Rate of an Early Permian Volcanic Tuff from Wuda Coalfield, Inner Mongolia

引用

Acta Geologica Sinica(English Edition) 2013年第5期87卷 1242-1249页

作者： WANG Jun HE Xuezhi Hermann W.PFEFFERKORN WANG Jinrong State Key Laboratory of Palaeobiology and Stratigraphy (LPS) and department of palaeobotany and Palynology Nanjing Institute of Geology and PalaeontologyChinese Academy of Sciences State Key Laboratory of Systematic and Evolutionary Botany (LSB) Institute of BotanyChinese Academy of Sciences department of Earth and Environmental Science University of Pennsylvania College of Earth and Environment Sciences Lanzhou University

Compaction rates of sediments or volcaniclastic material are needed to reconstruct original thickness of a bed, which in turn is required to reconstruct subsidence rates, sea-level rise, or in the case of volcanielastic, the location or direction of the eruption site. The knowledge of compaction rates can also aid in the reconstruction of deformed fossils. The known shape of deformed fossils can allow the determination of the compaction they experienced. Here we report the compaction rate in an early Permian volcanic tuff from Wuda, Inner Mongolia, determined from the deformation of standing tree fern stems of known anatomy. The compaction rate has been found to be 0.56 in this case, indicating that 44% of original thickness remains.

关键词： Compaction volcanic tuff Early Permian tree trunk Wuda

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evidence of the oldest extant vascular plant(horsetails)from the Indian Cenozoic

引用

植物多样性:英文版 2023年第5期45卷 569-589页

作者： Sampa Kundu Taposhi Hazra Tapan Chakraborty Subir Bera Mahasin Ali Khan palaeobotany and Palynology Laboratory Department of BotanySidho-Kanho-Birsha UniversityRanchi RoadPurulia 723104India Geological Studies Unit Indian Statistical Institute203B.T.RoadKolkata 700108West BengalIndia Centre of Advanced Study Department of BotanyUniversity of Calcutta35B.C.RoadKolkata 700019India

Equisetum(Equisetaceae)has long been a focus of attention for botanists and palaeontologists because,given its extensive and well-documented fossil record,it is considered the oldest extant vascular plant and a key element in understanding vascular plant ***,to date,no authentic fossil evidence of Equisetum has been found from the Indian ***,we describe a new fossil species,namely,*** ***.,recovered from the middle Siwalik(Late Miocene)sediments of Himachal Pradesh,western *** identified fossil specimens based on morphological and epidermal *** addition,X-Ray diffraction(XRD)analysis was used to determine the mineral composition of compressed stems of *** close affinity of our recovered Siwalik fossils to Equisetum is supported by the presence of both macromorphological and epidermal *** Equisetum generally grows in wet conditions around water reservoirs,our findings indicate that the fossil locality was humid and surrounded by swamp and lowland regions during *** fossil evidence indicates that this sphenopsid once existed in the western Himalaya during the Siwalik ***,at present Equisetum is confined to a particular area of our fossil locality,probably a consequence of severe environmental changes coupled with competition from opportunistic *** discovery of Equisetum fossils in appreciable numbers from the Siwalik sediments of the Himachal Himalayas is unique and constitutes the first reliable recognition of Equisetum from the Indian Cenozoic.

关键词： Equisetum Fossil stem and leaf sheaths Late Miocene Paleoecology Siwalik Western India

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：