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1.
WANG Deming 《《地质学报》英文版》2007,81(4):525-538
Zosterophyllum longa sp.nov.is reported from the Lower Devonian Pingyipu Formation, Jiangyou District,northern Sichuan of China.This new plant has vertically elongate sporangia differing from all known species of Zosterophyllum,demonstrating morphological variations in Zosterophyllophytina.New materials of Zosterophyllum yunnanicum from the Lower Devonian Xujiachong Formation,Qujing District,eastern Yunnan of China show that fertile axes of this species are anisotomous or pseudomonopodial or K-shaped in branching.Sometimes fertile lateral axes are very short and bear an axUlary axis at the dividing point.Distinct thickening occurs along the whole margin of a sporangium,with sporangial lobes undeveloped.The evolution of Zosterophyllum is tentatively discussed.A biostratigraphic method of Gerrienne and Streel is introduced and applied to dating of the Lower Devonian Xujiachong Formation,which is considered as of the late Pragian-early Emsian. 相似文献
2.
A new genus and species,Ramoferis amalia gen.et sp.nov.,is described from the Early Devonian(Pragian)Posongchong Formation,Wenshan district of southeastern Yunnan,China.This plant has isodichotomous major axes,which also divide anisotomously distally to produce closely spaced lateral branches,often within fertile regions.The stalked round to reniform sporangia,borne laterally and spirally over several levels of branches,are distantly to moderately spaced or aggregated into distinct spikes.The stalks incr... 相似文献
3.
Zosterophyllum(工蕨属)是早期陆生植物的代表性类群之一,全球广泛分布。Z.australianum(澳大利亚工蕨)产自华南和澳大利亚,是东北冈瓦纳古植物地理区系的典型分子。文中描述了产自贵州都匀包阳剖面蟒山群中的Z.australianum新材料。该标本的孢子囊具短柄,呈椭圆形或扇形,宽2.6~4.1 mm,高可达3.9 mm,加厚带宽约0.6 mm,紧密螺旋排列形成孢子囊穗,与云南文山早泥盆世坡松冲植物群中的Z. australiaunum极为相似。依据目前对Z. australianum时代延限的认识,并结合蟒山群其他植物属种的发现(如Adoketophyton subverticillatum),推断该群下段的时代为早泥盆世布拉格期。Z. australianum在蟒山群中的发现,扩展了该植物的地理分布范围,反映出蟒山群中的植物组合与坡松冲植物群存在一定联系。 相似文献
4.
Zosterophyllum(工蕨属)是早期陆生植物的代表性类群之一,全球广泛分布。Z.australianum(澳大利亚工蕨)产自华南和澳大利亚,是东北冈瓦纳古植物地理区系的典型分子。文中描述了产自贵州都匀包阳剖面蟒山群中的Z.australianum新材料。该标本的孢子囊具短柄,呈椭圆形或扇形,宽2.6~4.1 mm,高可达3.9 mm,加厚带宽约0.6 mm,紧密螺旋排列形成孢子囊穗,与云南文山早泥盆世坡松冲植物群中的Z. australiaunum极为相似。依据目前对Z. australianum时代延限的认识,并结合蟒山群其他植物属种的发现(如Adoketophyton subverticillatum),推断该群下段的时代为早泥盆世布拉格期。Z. australianum在蟒山群中的发现,扩展了该植物的地理分布范围,反映出蟒山群中的植物组合与坡松冲植物群存在一定联系。 相似文献
5.
HAO Shougang WANG Deming WANG Qi XUE Jinzhuang 《《地质学报》英文版》2006,80(1):11-19
A new plant, Zhenglia radiata gen. et sp. nov., from the Posongchong Formation （Early Devonian, Pragian age） of the Wenshan District of southeastern Yunnan Province, China is a small herbaceous lycopsid. The aerial branches divide into foliar and fertile stems. The arrangement of the leaf bases on the stem shows lepidodendroid-like phyllotaxy. Possibly the leaf base bears a ligulate pit. The microphyll consists of a swollen, decurrent base, and an entire, linear lamina. The fertile axis is composed of sporophylls arranged helically, forming a compact area similar to cone-like structure. Each sporophyll consists of a widened lateral extension and a distal lamina. The ovoid-elongate sporangia are attached adaxially on the surface of sporophylls. Based on morphological similarities, especially the undivided microphylls, the style of phyllotaxy, the form of the cone-like structures and sporangia, the new lycopsid Zhenglia radiata is placed in the order Protolepidodendrales and a possible evolutionary relationship with the arborescent lycopsids of the Late Devonian and Carboniferous is considered. 相似文献
6.
鄂西地区泥盆纪地层分布广泛,剖面完好,化石丰富,是我国晚泥盆世早期黄家磴阶建阶地区。 泥盆纪叶肢介化石在国外有少数报道,在我国除晚泥盆世晚期有报导外,晚泥盆世早期至今没有发现和报导。因此,鄂西地区上泥盆统下部黄家磴组叶肢介化石的首次发现,不仅对于研究叶肢介的演化。地层时代和地理分布有重要意义,而且对丰富黄家磴组生物内容也是重要的。 黄家磴组化石孢子十分丰富,计30余属,70余种、由于篇幅所限,仅部分予以报道,特别有意义的是在叶肢介化石同一标本所发现的孢子,对于沉积环境、动植物群之间的关系等研究提供了线索,并且增添了新内容。 相似文献
7.
笔者描述了广西南宁下泥盆统布拉格阶那高岭组下部盔甲鱼类的新发现,建立了华南鱼科2 个新种——丘比特华南鱼(Huananaspis cupido sp. nov. )和梁氏亚洲鱼(Asiaspis liangi sp. nov. )。前者以头甲个体较小、不发育中背棘、两角末端超出头甲后缘等特征区别于属型种武定华南鱼(H. wudingensis),后者以头甲长大于宽、角向头甲侧后方延伸、角后缘发育锯齿、中背孔呈纵长椭圆形等特征区别于属型种宽展亚洲鱼(A. expansa)。广西南宁地区那高岭组具有可靠的地质时代证据,其中所产的徐家冲鱼类化石组合能够为华南地区早泥盆世地层的对比研究提供鱼类化石标准,而华南鱼属(Huananaspis)和亚洲鱼属(Asiaspis)在那高岭组的发现,丰富了华南鱼类的多样性,扩大了徐家冲鱼类组合的化石内容,并为云南武定坡松冲组与广西南宁那高岭组之间的对比提供了直接化石证据。广西南宁莲花山组与那高岭组过渡层中的徐家冲鱼类化石组合物种多样性最高,几乎涵盖了其他地区该组合的所有属种,说明广西南宁地区可能是盔甲鱼类辐射和扩散的中心之一。该地区早泥盆世布拉格期的古鱼类、早期维管植物和腕足动物均表现出显著的地方性色彩,可能跟华南海是一个半封闭的陆表海湾有关,即由于封闭海效应,鱼类在这个封闭的环境中独立演化,表现出很高的多样性和很强的土著性,最终在华南板块上形成一个独立的动物区系——“盔甲鱼—云南鱼”动物区系。 相似文献
8.
新疆塔里木盆地西—西南缘泥盆—石炭纪四射珊瑚 总被引：1，自引：1，他引：1
塔里木盆地西—西南缘石炭纪地层层序清楚,化石丰富,是新疆研究石炭系的良好地区之一。目前海相泥盆纪地层中有化石佐证的只有中泥盆世,而早泥盆世地层存在与否尚难定论。描述珊瑚计22属22种。中泥盆统3属3新种,石炭纪19属12新种。塔里木盆地西—西南缘的中泥盆统称克孜勒陶组,上泥盆统为奇自拉夫组,属陆相沉积。石炭系自下而上为下统库山河组、克里塔克组、和什拉甫组;中统卡拉乌依组、阿孜干组;上石炭统塔哈奇组、克孜里奇曼组。 相似文献
9.
昆仑山西段及喀喇昆仑山,部分四射珊瑚化石,经笔者研究计有:喀喇昆仑山楚隆帕斯坦中泥盆统落石沟组含Grypophyllum kelakunlunense(sp.nov.);昆仑山西段下石炭统他龙群产Diphyphyllum kunlunense(sp.nov.)喀喇昆仑山中石炭统含Protodurhamina kelakunlunensis(sp.nov.), Lithostrotionella sp.;昆仑山西段中、上石炭统库尔浪群含Protodurhamina kunlunensis (sp.nov.), Neokoninckophyllum sp., Kionophyllum kunlunense(sp. nov.), Paracarruthersella sp., Orygmophyllum convexum Fomitchev。 相似文献
10.
新疆哈巴河县阿舍勒泥盆—石炭纪四射珊瑚 总被引：1，自引：0，他引：1
笔者1990—1991年在新疆哈巴河县阿舍勒采集和描述的四射珊瑚,经研究鉴定计有8属3新种和6未定种:Sinospongophyllum habaheens(sp. nov.), S. sp.,Orthophyllum sp.,Tryplasma Sp.,Cystophrentis achelenensis (sp. nov.), Siphonaphyllia habaheensis (sp. nov.),Clavilasma?sp.,Bifossularia?sp.,Amplexizaphrentis sp.等,它们分别归属于托克萨雷组、阿舍勒组和红山嘴组。 相似文献
11.
肋木是欧亚大陆早一中三叠世最标志的一属植物,在华南以往的地质文献中尚未报道过。本文描述了首次发现于桑植县一带中三叠世巴东组下段的一种肋木化石即湖南肋木(新种)。根据这个种的孢子囊近似凹入的盘形等特征,认为它是一种适应在水体中漂浮的滨海潮坪植物。此外,文中对肋木的地质、地理分布也作了较系统的总结,并提出其确切的地质时限为印度期一安尼期的看法。 相似文献
12.
西藏申扎地区下泥盆统达尔东组珊瑚化石新材料 总被引：3，自引：0，他引：3
系统描述了采自藏北申扎地区下泥盆统达尔东组的部分珊瑚类化石。其中，皱纹珊瑚7属5种(含1新种Hunanaxonia xizangensis sp．nov．)及2个未定种；床板珊瑚形珊瑚4属4种，含2个新种(Pachycanalicula sparcula sp．nov．，Paraheliolites zakangensis sp．nov．)。这些珊瑚化石的发现将有助于进一步了解本区早泥盆世珊瑚动物群的共生组合、演化以及珊瑚的古生物地理区系。 相似文献
13.
为进一步丰富新疆西准噶尔地区泥盆纪-石炭纪(D-C)之交古生物地层资料,为研究区泥盆和石炭系划分、古环境重建提供新的证据,经野外采样、室内处理等工作,首次报道了西准噶尔俄姆哈地区D-C之交介形类9属12种(包括1新种):Cavellina sublatiovata, C.cf.obesa, C.sp., Glyptopleura sp., Healdianella renalata, H.sp., Bairdiocypris vafra, Bairdia sp., Rectobairdia sp., Fabalicypris sp., Youngiella calvata, Coelonella xizhunensis sp.nov..根据介形类生物地层,并参照共生的其他门类化石,认为西准噶尔俄姆哈剖面至少在第3层就进入了早石炭世,进一步证明了洪古勒楞组的时代应该是晚泥盆世-早石炭世.介形类的古生态研究表明,西准噶尔俄姆哈地区是火山岛弧区在火山间歇期的近岸浅水沉积环境. 相似文献
14.
：Yumushan
block on the north margin of Qilian mountain, with Jiudong basin and Minle basin to the
west and east respectively, belongs to the fore-land depression in NNW direction at the
north margin of the Qilian mountain fold belt. The Yumushan block has been thought of as a
fault-uplift, which separates the two basins formed during late Yanshanian orogeny.
However, the recognition of fault zones at the western margin of the Yumushan block, and
the tectonic and sedimentary analyses of the Yumushan block and the basins, cast doubts to
the tectonic property of the block. It is suggested that the two basins be derived from an
united large basin at least during Mesozoic and the Yumushan block be nappe sheet formed
due to NE imbricate thrusting on the north margin fault zone of the Qilian mountain. This
proposal would provide valuable clues to further exploration of oil-gas and water
resources in Hexi corridor basin belt. 相似文献
15.
本文鉴定和描述了中国南方泥盆系的颗石藻化石,计有两个新属,八个新种和一个未定种。其中中华甲球藻属(新属)(Sinothoracosphaera gen.nov.)包括盘桃中华甲球藻(新种)(S.placenta sp.nov.)和异孔中华甲球藻(新种)(S.heteromorphicpororata sp.nov.);始驳船球石属(新属)(Eopontosphaera gen.nov.)只一个新种,即背篓形始驳船石(新种)(E.basketa sp.nov.)其它五个新属是瘤刺篮石(新种)(Scyphosphaera verruca-cras-sispina sp.nov)、小卷螺海石颗石藻(新种)(Helicopontosphaera snaila sp.nov.)、口盖无缘帽形石(新种)(Calyptrolithus operculum sp.nov.)、口孔棒球藻(新种)(Rhabdosphaerabucca-pororata sp.nov.)、柿子颗石藻(新种)(Coccolithus persimmonus sp.nov.)。一个未定种是篮石未定种(Scyphosphaera sp.)。这些化石均是在深水断槽相中发现的。 相似文献
16.
Ostracod from the upper Lower to Middle Devonian rocks of the Argentine Precordillera Basin (Talacasto and Punta Negra formations) are studied. One new genus Pircawayra nov. gen., and five species (including three new: Pircawayra gigantea nov. gen. and sp., Lapazites trinodis nov. sp. and Keslingiella? teresae nov. sp.) are defined. The recorded ostracod fauna closely resembles that coeval from Bolivia and South Africa, exhibiting a remarkable endemism, not only at the genus level, but also at the species level. In addition to its low-diversity, the Malvinokaffric ostracod association is also characterized by having large, thick, coarsely ornamented and swollen valves. The similar ostracod composition from the Andean and South African basins suggests faunal exchange between these two areas. Based on the ostracod faunas, the Malvinokaffric Realm is clearly recognizable at least up to the Middle Devonian. 相似文献
17.
湖南中部早石炭世腕足动物组合及几个问题的讨论 总被引：4，自引：0，他引：4
对湘中下石炭统腕足动物群的系统研究表明,该地区的腕足动物群自下而上可划分为6个组合带;1.“plicatifera” tenuiplicaia Hou Ass.（Lower Toumaisian）,2.Unispiri-fer tournaicensis（Kon.）—Eochoristites alatus（Ching）Ass.（Middle Tournaisian）; 3．Finosp-irifer shaoyangensis（Ozaki）—Marginatia vaughani（Muir--Wood）Ass.（Upper Tournasian）;4.（?）itiliproductus groberi（Kren.）——Pugilis hunanensis（Ozaki）Ass.（Lower Visean）;5.Para-kansuella subrhomboidea Sp·nov.——Kansuella——Gigantoproductus maximus （M’coy）Ass．（UpperVisean）;6.Latiproductus latissimus（Sow.）—Gigantoproductus edelburgensis（Phillips）Ass.（Lower Namurian or Serpukhovian）.这些腕足动物大部分是特提斯区广泛分布的属种,能够与西欧,苏联等地的同时期动物群进行很好的对比.对邵东组腕足动物的研究表明,该组的地质时代属晚泥盆世末期.其所产腕足动物能很好地与西欧及苏联同期地层的腕足动物比较.研究表明,在湘中杜内与维宪阶的生物地层界线,根据腕足动物,应置于Finospirifer-marginatia动物群和Delepinea subcarinata—Megachonetes zimmermanni组合带之间,而不是过去认为的Eochoristives—Martiniella动 相似文献
18.
19.
云南省华宁县盘溪地区的泥盆纪浅海相地层发育,珊瑚化石丰富,研究历史悠久,是中国南方重要的泥盆系剖面之一,它在国内外地层古生物学界久负盛名。1948年王鸿祯教授首次描述了盘溪等地泥盆纪的四射珊瑚19属36种(包括变种、未定种等),其中有19新种,自下而上建立了G、C、K、E、T、P、D等7个珊瑚层(horizon),奠定了滇东泥盆纪生物地层研究的基础,该文至今仍一直被国内外地层古生物学界同行所引用和参考。文中描述了盘溪泥盆纪四射珊瑚13属13种(包括未定种和近似种)及其上覆下石炭统的四射珊瑚1属2种。文章还着重讨论了泥盆系的南盘江组、一打得组和在结组的地质时代以及泥盆—石炭系界线等地层问题。 相似文献
20.
Researches on Plants from the Lower Devonian Xujiachong Formation in the Qujing District, Eastern Yunnan 总被引：1，自引：0，他引：1
WANG Deming HAO Shougang LIU Zhenfeng School of Earth Space Sciences Peking University Beijing 《《地质学报》英文版》2002,76(4):393-407
Fossil plants Hedeia sinica Hao et Gensel 1998, Huia gracilis Wang et Hao 2001 and Guangnania cuneata Wang et Hao are described from the Lower Devonian Xujiachong Formation, the Qujing district, eastern Yunnan, China. They contribute to our knowledge of the flora in this district. Based on the occurrence of common plants (Hedeia, Huia, Guangnania and Zosterophyllum australianum) and their horizons, it is proved for the first time that the mid-lower assemblage of the Xujiachong flora is comparable with the Early Devonian ((late) Pragian) Posongchong flora of southeastern Yunnan and the upper Baragwanathia flora of Australia. In view of this fact and the stratigraphic sequence, the mid-lower part of the Xujiachong Formation is considered to be of (late) Pragian age. Through comprehensive analyses of plant, bivalve and fish assemblages and the lithology, the upper part of the Xujiachong Formation is dated to be of early Emsian age. The Xujiachong flora belonged to the northeastern Gondwana palaeophytogeogr 相似文献