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1.
描述了箭蜓科（Gomphidae）一新属种一宽翅辽宁澜箭蜓（Liaoninglanthus latus gen．et sp．nov．）及新属一未定种（Liaoninglanthus．sp．），还对义县光箭蜓（Liogomphus yixianensis Ren et Gao，1996）进行了补充描述。化石全部采自辽西北票黄半吉沟义县组下部（晚侏罗世晚期一早白垩世）。 相似文献
2.
宁夏中卫县下河沿太原组生物地层—兼论石炭—二叠系分界 总被引：1，自引：0，他引：1
本文将宁夏中卫县下河沿原上石炭统太原组划分为上、下二个段。太原组上段，含蜒科为Ｐｓｅｕｄｏｓｃｈｗａｇｅｒｉｎａ带及Ｓｐｈａｅｒｏｓｃｈｗａｇｅｒｉｎａ带的属种为代表，牙形石Ｓｔｒｅｐｔｏｇｎａｔｈｏｄｕｓ属为主，植物为东方鳞木类繁多，裸子植物花粉占优势。以上古生物面貌应属于早二叠世。太原组下段，含蜒科Ｍｅｄｏｃｒｉｓ，Ｐｓｅｕｄｏｓｔａｆｆｅｌｌａ，牙形石Ｉｄｏｇｎａｔｈｏｄｕｓ ｄｅｌｌｉｃａ 相似文献
3.
描述了箭蜓科(Gomphidae)一新属种—宽翅辽宁澜箭蜓(Liaoninglanthus latusgen.et sp.nov.)及新属一未定种(Liaoninglanthus.sp.),还对义县光箭蜓(Liogomphus yixianensisRen et Gao,1996)进行了补充描述。化石全部采自辽西北票黄半吉沟义县组下部(晚侏罗世晚期—早白垩世)。 相似文献
4.
二叠系是广东省的主要产煤地层。阳春地区的上二叠统为阳春组，下二叠统有童子岩组、花园组和栖霞组。童子岩组含煤层；花园组产菊石化石。本文所记述的菊石化石共有４属６种，即Ｐａｒａ－ｇａｓｔｒｉｏｃｅｒａｓｉｒｗｉｎｅｎｓｅ（Ｔｅｉｃｈｅｒｔ），Ｐ．ｃｆ．ａｒｔｏｌｏｂａｔｕｍＲｕｚｈｅｎｃｅｖ，Ｄａｕｂｉｃｈｉｔｅｓｃｆ．ｓｈｏｕｃｈａｎｇｅｎｓｉｓ（Ｃｈａｏ），Ｄ．ｙａｎｇｃｈｕｎｅｎｓｉｓＳｈｅｎｇ（ｓｐ．ｎｏｖ），Ｃｒｉｍｉｔｅｓｃｆ．ｋｒｏｔｏｗｉ（Ｋａｒｐｉｎｓｋｙ），ＰｒｏｓｔａｃｈｅｏｃｅｒａｓｇｕａｎｇｅｎｓｅＳｈｅｎｇ（ｓｐ．ｎｏｖ．）．这在广东尚属首次发现，其时代为早二叠世晚期，相当我国南方早二叠世茅口期早期。本文为在我国南方寻找新的煤田及国内外二叠系的划分和对比提供了新的线索。 相似文献
5.
六枝-盘县地区的早二叠世隆林期地层,相区分异明显、(竹蜒)类化石数量巨大.各相区(竹蜒)类化石群落特征差异较大:半局限台地相为Staffella-Nankinella-Pisolina;台地边缘生物滩(礁)相为Parafusulina-Pseudofusulina;斜坡-盆地相为Pseudofusulina,进一步划分为近岸碳酸盐上缓坡环境的Staffella-Parafusulina-Wentzellophyllum群落、远岸碳酸盐上缓坡环境的Pamirina-Schwagerina-Pseudofusulina群落、碳酸盐下缓坡环境的Pseudofusulina-Robustoschwagerina-Kepingophyllum群落和盆地环境的Pseudofusulina-Schwagerina-Verbeekiella群落. 相似文献
6.
五台山地区寒武纪地层及三叶虫动物群（３）：属种描述王绍鑫，张进林（山西省地质矿产局区域地质调查队）（地质矿产部天津地质矿产研究所）３属种描述（Ｂ）无肩虫超科ＡｎｏｍｏｃａｒａｃｅａＰｏｕｌｓｅｎ，１９２７原附栉虫科ＰｒｏａｓａｐｈｉｓｃｉｄａｅＣｈａ... 相似文献
7.
本文将宁夏中卫县下河沿原上石炭统太原组划分为上、下二个段。太原组上段（剖面１８—３１层），含科以Ｐｓｅｕｄｏｓｃｈｗａｇｅｒｉｎａ带及Ｓｐｈａｅｒｏｓｃｈｗａｇｅｒｉｎａ带的属种为代表，牙形石Ｓｔｒｅｐｔｏｇ－ｎａｔｈｏｄｕｓ属为主，植物为东方鳞木类繁多，裸子植物花粉占优势。以上古生物面貌应属于早二叠世。太原组下段（剖面１—１７层），含科Ｍｅｄｏｃｒｉｓ，Ｐｓｅｕｄｏｓｔａｆｆｅｌｌａ，牙形石Ｉｄｏｇｎａｔｈｏｄｕｓｄｅｌｌｉｃａｔｕｓ，Ｉ．ｏｌａｖｌｆｏｒｍｉｓ等为主；植物以Ｎｅｕｒｏｐｔｅｒｉｓｐｓｅｕｄｏｖａｔａ及Ｓｐｈｅｒｏｐｈｙｌｌｕｍｏｂｌｏｎｇｉｆｏｒｌｉｕｍ最繁盛，其时代呈现浓厚晚石炭世特征。据上述情况，本区石炭—二叠系的界线应置于太原组上、下段之间，这条界线比我国传统的划界位置低一些，而与目前国际上普遍采用的界线已趋于一致。 相似文献
8.
三峡水库周期性蓄水改变了岸坡内的地下水渗流场和应力场,降低岩土体的剪切强度,对库岸边坡、岩体稳定性影响很大。以往库区岸坡岩体形变监测主要通过设置固定点进行观测,难以发现岩体整体变化情况。地面三维激光扫描方法能获取岩体整体表面厘米精度的点云数据,具有无需接触目标、获取速度快、精度高等特点,非常适合库区高陡危岩体表面三维形变监测。以巫山箭穿洞危岩体为例,采用地面三维激光扫描方法对箭穿洞危岩体进行了为期2年（2017—2018年）共3期监测,以第一期观测目标周围稳定岩体数据为基准,对数据进行重叠点云迭代配准,点云配准精度优于±2.7 cm。针对箭穿洞危岩体在观测时段内的变化情况,构建危岩体区域的基准不规则三角网模型,以点到基准面最近距离法结合危岩体变化区间分析其变形。通过对比分析箭穿洞危岩体3期观测数据,发现相对于2017年,2018年箭穿洞危岩体左侧岩体有变形趋势;在库区蓄水阶段,危岩体局部多处存在明显凹陷变化,局部因蓄水影响发生约?0.03～?0.07 m变形。结果证明三维激光扫描技术在库岸高陡边坡形变监测中的有效性,为三峡库区高陡危岩体形变监测及地质灾害防治工作提供了参考。 相似文献
9.
三峡库区中侏罗世植物化石及所指示的气候环境 总被引：4，自引：0，他引：4
报道了陈家湾组的植物化石８属１１种（包括１新种）即Ｎｅｏｃａｌａｍｉｔｅｓｓｐ．１,Ｎ．ｓｐ２．Ｐｈｌｅｂｏｔｅｎｓｏｆ．ｐｏｌｙｐｏｄｉｏｄｉｅｓＢｒｏｎｇｎｉａｒｔ,Ｔｈａｕｍａｔｏｐｔｅｒｉｓ,ｓｐ．,Ｃｏｎｉｏｐｔｅｒｉｓｓｉｎｐｌｅｘ（Ｌ．ｅｔＨ．）,ＣｌａｄｏｐｈｌｅｂｉｓｓｈａｎｓｉｅｎｓｉｓＳｚｅ,Ｃ．ｘｉｅｔａｎｅｎｓｉｓＭｅｎｇ（ｓｐ．ｎｏｖ．）Ａｎｏｍｏｚａｍｉｔｅｓｇｒａｃ 相似文献
10.
陕南震旦系灯影组瓶状微化石研究新进展 总被引：7，自引：0，他引：7
在张录易、李勇（１９９１）初步研究的基础上，作者再次系统采集化石并研究，进一步查明了陕南晚震旦世高家山生物群中瓶状微化石的产出层位、地理分布、宏观特征和属种组合，计有ＰｒｏｔｏｌａｇｅｎａＺｈａｎｇｅｔＬｉ，ｐ．ｇａｏｊｉａｓｈａｎｅｎｓｉｓＺｈａｎｇｅｔＬｉ．Ｐ．Ｐａｐｉｌｌａｔａ（Ｚｈａｎｇ），Ｐ．ｃｙｌｉｎｄｒａｔａ（ｓｐ．ｎｏｖ．）；Ｓｉｃｙｌａｇｅｎａｆｏｒｍｏｓａ（ｇｅｎ．ｅｔｓｐ．ｎｏｖ，），Ｓ．ｌａｔｉｓｔｕｍａ（ｇｅｎ．ｅｔｓｐ．ｎｏｖ．）和一未命名的化石。同时借用电子探针能谱分析和激光分子拉曼微探针等设备对壳壁特征和壳壁物质成分做了尝试性研究，取得较好的效果。 相似文献
11.
本文记述山东莱阳盆地早白垩世莱阳组（K1l3）草蛉科的一个新属——龙草蛉属（Drakochrysa gen.nov.）。新属以其脉序特色而区别于相近的幻草蛉属（Nothochrysa）,并修改了中草蛉属中一个种归入本新属。同时对草蛉科各个亚科的地史分布及新属的分类位置作了讨论。 相似文献
12.
New Genus and Species of Fossil Dragonflies （Insecta： Odonata） from the Yixian Formation of Northeastern China 总被引：1，自引：4，他引：1
ZHANG Binglan REN Dong ZHOU Changqing PANG Hong 《《地质学报》英文版》2006,80(3):327-335
Two well-preserved fossil dragonflies from the Late Mesozoic Yixian Formation, Liaoning Province, China are described and assigned to a new genus, Sopholibellula gen. nov. in Araripelibellulidae Bechly, 1996, closely related to the type genus Araripelibellula. This new genus differs from AraripelibeUula in the following characters： origins of RP and MA distinctly separated at arculus in both pairs of wings; anal loop wider and shorter, with Y-shaped veins inside; MA and IR2 not zigzag; several small intercalary veins present in the postdiscoidal area of hindwing; cells smaller and much more dense, especially in the apex and hind margin; bigger in size. Structures, including head, abdomen and parts of legs, were first described in details of this family. 相似文献
13.
<正>A new specimen assigned to the species Iverya averyi gen.nov.and sp.nov.is described.This species is considered as a triadotypomorphan insect,a poorly known group of Triassic stem-odonatans.Like other triadotypomorphans,this species exhibits an area between MA and MP that is comparatively broad,and a cubitoanal area involving an AA stem distinct from CuA+CuP+AA emitting several posterior branches.Diagnostic character states of the new species are listed.Although incomplete,the specimen provides new information on the wing morphology of triadotypomorphans.This discovery might contribute to better assessment of the phylogenetic position of triadotypomorphan species with respect to other stem-odonatans. 相似文献
14.
Two new genera and three new species of the Mesozoic family Aeotheogrammatidae are described from the Lower Cretaceous of Yixian Formation (Liaoning Province, China): Cyclicogramma rotundum gen. et sp. nov. and Aetheogramma bistriatum sp. nov. from Huangbanjigou, and Curtogramma ovatum gen. et sp. nov. from Dawangzhangzi. The hind wing of Cyclicogramma rotundum gen. et sp. nov. differs from that of other species by its smaller size, its overall shape, RP bearing only two oblique radial branches, and its configurations of CuP, AA1, and AA2. Aetheogramma bistriatum sp. nov. is closely related to A. speciosum Ren and Engel, 2008, but distinguished from the latter by its distinctive configuration of RP1, and the narrower and longer AA2 space in the hind wing. Curtogramma ovatum gen. et sp. nov. is distinguished from all other species of the family by the forewing with M forking very far from the wing base. 相似文献
15.
豫西禹县二叠纪大羽羊齿类的演化及其地质意义 总被引：6，自引：0，他引：6
豫西禹县二叠纪大羽羊齿类共鉴定有6属24种（包括 2个新属和15个新种）其垂向分布和演化趋向明显,可分为4个演化阶段、2个演化趋向和2个演化系列.作者修正了浅间一男建立的Emplectopteris series,认为Gigantopteris系由Giganlonclea通过Progigantopteris演化而来.根据形态功能与生态环境间的关系,作者认为大羽羊齿类叶形态的演化趋向主要是长期适应滨海热带暖湿气候环境的结果,而不是干旱所致.本区以大羽羊齿为首要分子的3个植物组合带皆可与华北地台北缘、华南及日本等地与海相动物群共生的植物群比较,是对华北地台二叠系进行多重划分的生物地层基础. 相似文献
16.
Abstract: Three new species of Chresmodidae are described. They belong to two different genera: Chresmoda multinervis sp. nov., Chresmoda shihi sp. nov. and Jurachresmoda sanyica sp. nov.. A study of the forewing venation is provided. Longitudinal veins are mostly parallel; costal area is broad at the basal and narrowing distally; ScP is probably extending close to the wing apex; R is parallel at length to ScP; MA is running close to R, with two long parallel branches; MA branched-off basally; while MP is not branched until the middle of the wing. However, the important basal part of MP and CuP is poorly preserved. In addition, unique fringing hairs on the mid legs of C. shihi sp. nov. and J. sanyica sp. nov. are described and compared with Jurachresmoda gaskelli Zhang, Ren and Shih, 2008. 相似文献
17.
Two new genera and species of fossil Palaeontinidae are described from Daohugou Village, Inner Mongolia.China:Cladocossus undulatus gen.et sp.nov.and Cricocossus paradoxus gen.et sp. nov.Both new genera are described based on well-preserved forewings.This discovery confirms the high diversity of palaeontinids during the Middle Jurassic.Both specimens have interesting modal structures which are new to Palaeontinidae:M five-branched and M3 with two branches.Based on this character,wing structural characteristic is discussed. 相似文献
18.
A new Mazon-Creek-type fossil specimen is described as Sumixam maximus gen. and sp. nov., assigned to the taxon Archaeorthoptera Béthoux and Nel, 2002 (composed of Orthoptera and some fossil relatives): it exhibits one of the diagnostic character states of this taxon, which is the fusion of CuA (emerging from M + CuA) with CuP, or a branch of it. A more precise taxonomic assignment is out of reach. The new taxon exhibits a fusion of the anterior branch of MA with RP, and a point of divergence of MA and MP located near the point of divergence of CuA (from M + CuA), but lack a branching of CuPa. This unique combination of character states is probably derived with respect to a number of contemporaneous species. Sumixam maximus gen. and sp. nov. is most likely the closest known relative of the panorthopterans, which include all the recent Archaeorthoptera. 相似文献
19.
New Fossil Palaeontinids from the Middle Jurassic of Daohugou,Inner Mongolia,China (Insecta,Hemiptera) 总被引：2，自引：1，他引：1
Two new genera and species of fossil Palaeontinidae are described from Daohugou Village, Inner Mongolia, China: Cladocossus undulatus gen. et sp. nov. and Cricocossus paradoxus gen. et sp. nov. Both new genera are described based on well-preserved forewings. This discovery confirms the high diversity of palaeontinids during the Middle Jurassic. Both specimens have interesting modal structures which are new to Palaeontinidae: M five-branched and M3 with two branches. Based on this character, wing structural characteristic is discussed. 相似文献
20.
郑春子 《吉林大学学报(地球科学版)》1986,(3)
本文研究了黔西、桂北威宁组的皱纹珊瑚26属、45种,并对其中的1新属、14新种进行了描述。据珊瑚化石的研究将该区的中石炭统自下而上划分为两个组合:1.Darwcsophyllum—Paracarruthersella组合;2.Acrocyathus—Shuichengophyllum组合。 相似文献