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1.
盾冠隐翅虫属,是隐翅虫科,异形隐翅虫亚科的一个大属,全世界已知356种,分布除南极洲以外的世界各地,模式种为Oxytelus sculpturutus Gravenborst。本文涉及属的研究简史、名称、鉴别特征、已知种和地理分布。  相似文献   

2.
对弯孢属(Curvularia Boedijn)的分类学作了简短的阐述。报道了河北省弯孢属真菌的10个种,其中4种为国内新记录种,5种为河北省新记录种。国内新记录种是枝孢弯孢(C.brachyspora Boedijn),香茅弯孢(C. cymbopogonis Grove & Skolko),中隔弯孢(C. intermedia Boedijn)和管突弯孢(C. protuberata Nelson & Hodyes);河北省新记录种是须芒草弯孢(C. andropogonis (zimm.)Boedijn),苍白弯孢(c.pallescens Boedijn),棒状弯孢(C. clavata Jain),膝曲弯孢(C. geniculata(Tracy & Earle)Boedijn)和近缘弯孢(C. affinis Boedijn)。文中有种的鉴定特征描述和分种检索表。  相似文献   

3.
记述采自太行山区的中国蜘蛛 2新种 :狼蛛科 L ycosidae豹蛛属 Pardosa的克氏豹蛛 Pardosa kronestedtisp.nov.和隐石蛛科隐石蛛属的马氏隐石蛛 Titanoeca mae sp.nov.  相似文献   

4.
调查华北地区无尾两栖类复殖吸虫,获6 科11 种,其中包括一个新种和两个宿主新记录.脐宫科的华北长囊吸虫,新种Dolichosaccus huabeiensissp. nov.枝腺科2 种,其中中华斜生吸虫Loxogenes sinensis(LietGu,1978) Wang, 1980,寄生于金线蛙,为宿主新记录.蛇颈科的罕见蛇颈吸虫Gorgodera (Extrem odera)unexpecta ,也寄生于金线蛙,为宿主新记录,并首次见于输卵管部位.此外尚有重盘科吸虫3 种,拟巨颈科1 种和舐血科1 种  相似文献   

5.
对四川王朗国家级自然保护区隐芒蝇属(双翅目:隐芒蝇科)昆虫进行了研究,记述了短须隐芒蝇Cryptochetum brevipalpise sp. nov.、二尖隐芒蝇C.dicranae Xi, Guan&Yin, 2020和云南隐芒蝇C.yunnanum Xi&Yang, 2015,并提供了特征图.列出了中国该属的已知种名录,概括了该属在中国的分布特点.模式标本保存在河南农业大学标本馆(Henan Agricultural University Museum, HAUM).  相似文献   

6.
记述了中国梨须隐翅虫属1新记录种:Oedichirus lewisus Sharp,上海突眼隐翅虫属2新记录种:Stenus proclinatus L.Benick和Smercator Sharp,首次给出了S.proclinatua的特征图,并提供了上海突眼隐翅虫属10种的分种检索表.  相似文献   

7.
记述了我国大陆圆胸隐翅虫属(Tachinus),圆胸隐翅虫亚属一新记录种--德国圆胸隐翅虫(Tachinus laticollis Gravenhorst)。该种采自新疆喀纳斯自然保护区。作者对该种的形态特征进行了描述,并对雌雄成虫的性特征进行了描画。  相似文献   

8.
本文记述寄生于我国淡水鱼类鳃上的单殖吸虫7新种,隶于二科三属.它们为铃形叉指环虫(新种)Dicrodactylogyrus campaniformis sp.nov.、溪生指环虫(新种)、Dactylogyrus fluvialis sp.nov.叉形指环虫(新种)D.furcellatus sp.nov.、弯卷指环虫(新种)D.cincinnatussp.nov.、多枝指环虫(新种)D.ramosus sp.nov.(?)似锚盘吸虫(新种)Ancylodiscoides hemibagri sp.nov.和弯管似锚盘吸虫(新种)A.curvitubus sp.nov.  相似文献   

9.
记述了我国四眼隐翅虫属Omalium一新记录种——日本四眼隐翅虫Omalium japonicum Sharp,采自上海佘山和江苏东山,描述了该种的形态特征和成虫的性特征.  相似文献   

10.
作者对毒隐翅虫亚科,膝角毒隐翅虫属的分类研究中,发现膝角毒隐翅虫属Ochthephilum与相关属隐毒隐翅虫属Cryptobium的相互关系不太明确.为澄清它们之间的关系,我们查阅了大量国内外相关文献并检视了本实验室标本.结果表明膝角毒隐翅虫属为隐毒隐翅虫属首异名,即膝角毒隐翅虫属为有效名.澄清了两属的关系.  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

15.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

16.
Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.  相似文献   

17.
以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.  相似文献   

18.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

19.
Quality traits in wheat (Triticum aestirum L.) were studied by quantitative trait locus (QTL) analysis in a recombinant inbred line (RIL) population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross (ChSh). Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.  相似文献   

20.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

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