元坝戴箭蜒雌虫记述

元坝戴箭蜒Davidius yuanbaensis是笔者(1988)发表的新种,当时未能报道雌虫,今将雌虫记述如下。 体长45mm;腹部长33mm;后翅长30mm。 头部 上唇前缘黄色,其宽度约为上唇的1/3多;前唇基赭石色;后唇基、前额及上额的一半均为鲜明的黄色;大颚基部、颊部亦为黄色,从而与后唇基的黄色连在一起;后头缘上有一条污黄色条纹(雄虫后头黄色);头部     

中国扩腹箭蜓属一新种记述(蜻蜒目:箭蜒科)

在整理我所扩腹箭蜒属(Stylurus)标本时,发现有采自广西南宁地区一新种。 南宁扩腹箭蜒 Stylurus nanningensis 新种(图1—5) 量度♂,体长55毫米,腹部长42毫米,前翅长37毫米,后翅长36毫米。上唇基部具有一对黄色小斑点,两斑相距较远;前唇基黑褐色,后唇基黑色;前额黑褐色,尤以两侧更为明显,额部之横纹位于上额前端二分之一处,横纹后缘中央略向前凹,在触角与侧单眼间略为向后突出;头顶、后头及后头后方黑色。前胸大部分黑褐色,仅前叶前缘具一黄色条纹,中叶两侧各具一甚大黄色三角形斑点。合胸色彩如图2,领条纹中央间断;背条纹与领条纹不相联;具肩前黄色上点,缺肩前下条纹;第二条纹和第三条纹完整;气门下缝具一甚细黑线。后胸下前侧片几乎全部黄色。气门边缘黑色。翅透明,本色。足大部分黑     

浙江普莱蜒属新种记述(蜻蜒目:蜒科)

本文记述蜓科普莱蜓属的一个新种,1979年采自浙江遂昌县九龙山。遂昌普莱蜓Planaeschna suichangensis,新种(图1—3) 雄性:体长59毫米,腹部长(连肛附器)52毫米,后翅长46毫米。 头部,下唇的中叶黄色,前缘窄的黑色;侧叶黑色,基部黄色。上唇黑色,基部具一宽的黄色条纹;前唇基褐色;后唇基黄色,前缘窄的黑色。前额和上额前方的1/3黑色,前额的两侧和上额后方的2/3黄色。头顶和后头黑色。 合胸黑色,两条黄色背条纹呈八字形,向下分歧,上下方不与其他条纹相连接;侧面两条宽的黄色条纹,一条在中胸上前侧片,上面较窄,向下渐宽,和中胸下前侧片黄色斑之间有黑色间隔不相连续,另一条在后胸后侧片。在宽的黑色条纹上,上面具一三角形黄色斑点,下面具一黄色斑点。     

包氏扇(虫忽)雌性记述(蜻蜒目:扇(虫忽)科)

本文记述包氏扇螅的雌虫,标本采自广东省海南岛兴峰的自然保护区。包氏扇螅 Drepanosticta brownelli(Tinkham),(图1-5) 雌性:体长37毫米,腹部长(连肛附器)35毫米,后翅长24毫米。 头部黑色,上唇基方二分之一,前唇基、上颚基部和颊均为象牙白色,触角黄褐色。 前胸黄色,背面有X形黑纹。合胸黑色,后胸前侧片有一象牙白色条纹,覆盖气门,后胸后侧片有一象牙白色条纹。     

中国赤蜂属一新种(膜翅目:蜜蜂总科, 条蜂科)

本文记述采自我国新疆的条蜂属一新种。模式标本保存于中国科学院动物研究所。 角条蜂Anthophora antennalis新种 雄虫 体长8毫米,黑色,头部(图1)唇基、上唇(基部两侧圆形褐色斑)、上颚(端部黑褐色)、颜侧(触角窝以下)、额唇基区、触角柄节及梗节的前表面均黄色;触角鞭节上表面红褐色,第1节基部及末节黑色;触角下表面褐色;各基跗节黑褐色,2-4跗节褐色;翅基片红褐色;胫节距浅黄色;腹部1—5节背板端缘黄褐色。头部明显横宽(长比宽为5:7);上颚无内齿;上唇横宽(长比宽为3:4),刻点粗而不均匀;唇基隆起较弱(图2),刻点     

中国箭蜒科新记录

在整理云南和广西的蜻蜒目标本时,发现我国箭蜒科新记录5种,以及福氏异箭蜒和汤氏日箭蜒的雌性第一次记述,报道如下。1.福氏异箭蜒Anisogomphus forresti(Morton)(图1) ,腹部长(连肛附器)35毫米,后翅长31毫米。 头部黑色,下唇中叶黑色,侧叶黄绿色;上唇黄绿色,前缘和基方有甚狭的黑色细纹;颊和上颚的基方黄绿色,后唇基中央黄色横纹阔;前额黑色,上额黄色;头后黑色,中央黄色。     

中国横断山蓟马三新种记述（昆虫纲：缨翅目）

本文记述了我国横断山缨翅目3新种。其中卡绢蓟马属1新种隶于蓟马科,眼管蓟马属1新种和岛管蓟马属1新种隶于管蓟马科。模式标本保存于中国科学院动物研究所。滑甲卡绢蓟马Kazinothrips xestosternitus Han,新种(图1) 雌虫:体长1.1mm。体暗棕色,但触角节Ⅰ-Ⅲ及Ⅳ大部分淡黄,节Ⅳ端和节Ⅴ-Ⅷ暗黄;前翅棕色,近基部有1无色淡带;后翅黄,中部有棕色纵带纹;各股节基部、胫节端部及跗节黄色;腹部节Ⅴ和Ⅵ黄色,节Ⅱ—Ⅷ背、腹片近前缘线深棕色。体和附肢的毛色与所在部位一致。     

中国木蠹蛾科二新纪新种

笔者在周尧教授指导下,在从事中国木蠹蛾科分类研究过程中,出现2个中国新纪录种,现纪录如下:黑袖木蠹蛾 Cossus acronyctoides(Moore) :翅展40—43mm,触角单栉状,伸达前翅前缘中央,头、胸、腹均为暗灰色。前翅较阔。基部1/3 褐灰色无条纹,端部2/3暗黑色。布满模糊细纹,无亚外缘线。后翅暗灰色,端部翅脉间有5条明显的暗色条纹。后足爪间中垫发达。     

中国小叶春蜓属研究(蜻蜓目,春蜓科)

记述了小叶春蜓属中国的4种及1亚种,描述了其中1新种.间纹小叶春蜓,新种Gomphidia interruptistria sp.nov.(图1～11)正模♂,云南省勐腊县瑶区,海拔1 000 m,2004-07-28,查岭生采.模式标本存放于陕西师范大学动物研究所.文中附有该属在我国的种检索表.新种与G.k.kruegeri及G.k.fukienensis相似,其主要区别见表1.词源:新种的背条纹和领条纹,以及背条纹和肩前上点均完全间断,故取名间纹小叶春蜓.     

环尾春蜒属一新种描述(蜻蜒目:春蜒科)

周氏环尾春蜒Lamelligomphus choui Chao et Liu,sp.n. 分布 安徽(黄山) 长度 雄性腹长(包含肛附器)45毫米,后翅38毫米。 雄性色采 头部 下唇除黑色端缘及齿外,大部分浅灰黄色。上颚末端黑色,基半部具甚大三角形黄斑。头部前面观色采如图1,上唇具一对甚大亚圆形黄斑;前唇基黄色,后唇基黑色,两侧各具一个横形小黄斑;额横纹遮盖上额的大部分及前额上方的一部分,     

Recent advances in the study of Kaposi's sarcoma-associated herpesvirus replication and pathogenesis

It has now been over twenty years since a novel herpesviral genome was identified in Kaposi's sarcoma biopsies. Since then, the cumulative research effort by molecular biologists, virologists, clinicians, and epidemiologists alike has led to the extensive characterization of this tumor virus, Kaposi's sarcoma-associated herpesvirus(KSHV; also known as human herpesvirus 8(HHV-8)), and its associated diseases. Here we review the current knowledge of KSHV biology and pathogenesis, with a particular emphasis on new and exciting advances in the field of epigenetics. We also discuss the development and practicality of various cell culture and animal model systems to study KSHV replication and pathogenesis.     

The structure, reproduction and taxonomy of Vidalia and Osmundaria (Rhodophyta, Rhodomelaceae)

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.     

New or rare chromosome counts in Artemisia L. (Asteraceae, Anthemideae) and related genera from Kazakhstan

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.     

肝癌中HBV和HCV基因和抗原的分布及意义

采用原位分子杂交方法检测HCV RNA及HBV X基因;采用免疫组织化学方法研究HCV核心抗原,非结构区C33c抗原及HBxAg在肝细胞肝癌中的定位及分布.结果表明(1)HCV RNA、HBV X基因在肝细胞肝癌组织检出率分别为40%(55/136)和82%(112/136).HCV RNA定位于癌细胞的胞浆内,阳性细胞呈散在、灶状及弥漫分布三种形式;HBV X基因在肝癌细胞中的分布呈胞浆型、核型及核浆型,阳性细胞也呈上述三种分布形式;(2)HCV C33c抗原、核心抗原在肝细胞肝癌中的阳性率为81%(133/164)及86%(141/164).C33c抗原定位于癌细胞及肝细胞的胞浆内;核心抗原既定位于癌细胞核中,又可定位于胞浆中.C33c抗原阳性细胞以灶状分布为主;而核心抗原阳性细     

Selection with two alleles and complete dominance

For a plant selection model with frequency-independent viabilities, fertilities and selfing rates, it is shown that apart from global fixation, for certain parameter combinations a protected polymorphism and facultative fixation (either allele may become fixed according to initial frequencies) may both occur. Facultative fixation requires different selling rates for the dominant and recessive type. Protection of the polymorphism requires resource allocation for male and female function. In this connection the problem of purely genetically caused population extinction is discussed.
For general frequency dependence and regular segregation, the chances for establishment of a completely recessive gene are compared to those of a completely dominant gene. It is proven that the process of establishment of the recessive gene, despite a fitness advantage, may be considerably endangered by drift effects if random mating prevails. The recessive gene may reach the same effectivity in establishment as a dominant gene, only if the recessive homozygote mates exclusively with its own type during the period of establishment.