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王新华 《Entomologia Sinica》2000,(3)
本文记述采自海南尖峰岭自然保护区异摇蚊属一新种 ,命名为额瘤异摇蚊Xenochironomustuberosussp .nov .新种头部具额瘤 ,腹部第六节背板生有粗大的刚毛 ,肛节背板毛序及生殖节上附器与本属已知种明显有别。依据该新种 ,本文对Cranston等 (1989)所描述的本属鉴别特征予以部分订正。该属在中国系首次记录。 相似文献
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悬茧蜂属Meteorus Haliday属于茧蜂科Braconidae优茧蜂亚科Euphorinae,在我国已记录11种。本文报道一新种,采自四川康定。模式标本存中国科学院动物研究所。 蝠蛾茧蜂 Meteorus hepiali,新种(图1—3) ♀:头、前胸背板、腹部第1背板褐黑色。中、后胸背板及并胸腹节黑色。腹部第2背板红褐色,在其后部两侧有黄褐色斑;第3背板红黑色;其后各背板逐渐色浅,至腹部端部褐色。触角、单眼浅褐色。复眼褐黑色。上颚黄褐色,其端部褐色。须浅黄色。足褐色(除后足基节黑褐色),自胫节逐渐色浅,至跗节端部为黄色。翅半透明;前翅前缘脉及翅痣浅褐色,其余翅脉色更浅些。产卵管鞘黑色。 头胸部及腹部(除背板)均密被细毛。头部背面观横宽,其宽度为长度的1.5倍,与胸部等宽;复眼中等大小,长卵圆形;触角柄节较粗,鞭节亚念珠状,23节(图1);头部具稀 相似文献
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本文报道湖南省节甲茧蜂属 Sigalphus Latreille,1802两新种。节甲茧蜂属隶茧蜂科,甲腹茧蜂亚科 Chloninae(Shenefelt,1973),该属在我国为首次记录。主要特征是头横置,下颚须4节;胸部粗壮,不宽于头,中胸盾片盾纵沟深;前翅肘室3个,径脉终止在翅尖端之前,第2肘室矩形,肘脉自基脉伸出,迥脉前叉式,小脉后叉式,前翅臀叶基部具横脉,后翅径室横脉弱;腹部长于头胸之和,3节,第1、2节背板之间能活动,第3背板侧缘后方有2齿状突;产卵管短。该属已知7种,分布在新北区(美国)1种、非洲区(马达加 相似文献
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坐腹姬蜂属Enizemun Foerster,1869,隶属于膜翅目姬蜂科蚜蝇姬蜂亚科,其主要特征为:中胸背板无盾纵沟;并胸腹节基区多少平坦;前翅通常有小翅室;腹柄节长宽几乎相等,背板有1对脊由基部伸达后缘;第2腹节背板基部有1对脊,第4腹节通常基部有折缘缝;雄虫触角中间鞭节有角下瘤。该属世界已报道约15种,中国记载2种:E.ornatum Gravenhorst,1829和E.formosense Uchida,1957。我们在整理标本时,发现该属1新种,现记述如下: 相似文献
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小蜜蜂属Micrapis Ashmead隶属于蜜蜂族Apini本届包括两种,即Micrapis florea(Fabr.),Micrapis andreniformis(Sm.)过去仅有工蜂形态的记述,缺少雌、雄性标本及对比资料。现根据中国科学院动物所标本及云南蜜蜂所采自云南各地此两种小蜜蜂雌、雄性标本形态作一比较,以利鉴别。此外,本文尚将生物学习性及分布加以整理,以便利用。 一、主要鉴别特征 雌性:腹部第1—2节背板、第3节背板基半部及第3—5节背板端缘均红褐色,余黑色;颚眼距长宽相等;POL:OOL=9:5;触角第3节稍长于第4节;各跗节褐色;体长13—15毫米…………小蜜蜂Micrapis florea(Fabr.) 相似文献
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菱猎蝽属在我国已知有四种,本文记述云南省该属一新种。云南菱猎蝽Isyndus yunnananus,新种(图1,2) 体栗褐色,污暗,被钱色稀疏长毛及浓密平伏的黄色短毛。触角第1、2两节黑褐色一色,第3、4两节桔红色,第3节端半部色较暗。前胸背板前叶深褐色,黄色平伏的浓密短毛构成整齐的云斑纹,后叶具显著的短横皱纹。小盾片及前翅革片黄色短毛簇生,形成毛斑。膜片深褐色光亮。腹背板深红色或暗桔红色。前足腔节及股节的内侧面均具黄褐色浓密短刚毛及稀疏长毛。 相似文献
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本文记述了我国树蝽科Isometopidae的一新属、四新种,其中奇树蝽属Sophianus Distant为中国首次记录的一个属。所有模式标本均存放在南开大学生物系。现将新属及新种描述如下: 桂树蝽 paraletaba Ren et Yang,新属 体阔椭圆形,背面光亮、圆鼓,具浓密刻点及短毛。头不垂直,而向后方倾斜,头的后缘高于前胸背板,将背板前缘遮盖;单眼大与眼相接;眼大,向上侧方突出;额向两侧及中部下方甚扩展,外缘具微微皱纹,刻点浅而稀疏;触角着生于眼的下方,第1节粗短,第2节最长,向端部渐略加粗,第3、4两节细,第3节显著长于第4节。喙 相似文献
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Profiles of SARS-CoV-2 RNA and Antibodies in Inpatients with COVID-19 not Related with Clinical Manifestation: A Single Centre Study 下载免费PDF全文
Zhao Li Gao Ruqin Lu Roujian Wang Huijuan Deng Yao Niu Peihua Jiang Fachun Huang Baoying Liang Jiwei Jia Jing Zhang Feng Wang Wenling Wu Guizhen Tan Wenjie 《中国病毒学》2021,36(5):1088-1092
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RICHARD E. NORRIS 《Botanical journal of the Linnean Society. Linnean Society of London》1991,106(1):1-40
Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera. 相似文献
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JOAN VALUÈS MONTSERRAT TORRELL NÚRIA GARCIA JACAS 《Botanical journal of the Linnean Society. Linnean Society of London》2001,137(4):399-407
Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted. 相似文献
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Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme
responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare
the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show
that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by
distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of
demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least
one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of
the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable
potent antiproliferative synthetic drugs. 相似文献
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正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases 相似文献