中国湖南细锤角叶蜂属一新种(膜翅目,锤角叶蜂科)

记述了采自中国湖南的锤角叶蜂科Cimbicidae细锤角叶蜂属Leptocimbex 1新种,Leptocimbex brevivertexis Wei et Yan,sP.nov..该种与Leptocimbex tenuicinctus Malaise,1939以及L.marginatus (Turner,1920)最近似,但两性单眼后区宽明显大于长;雄虫上唇平坦,无中纵脊;腹部背板无金属蓝色光泽,第1背板刻纹细弱,腹部2～7腹板大部黑色;中胸前侧片下缘无横脊;单眼后区侧沟完整,底部完全光滑.新种的寄主植物为槭树科Aceraceae的青榨槭Acer davidii Franch.新种模式标本保存于中南林业科技大学昆虫系统与进化生物学实验室昆虫标本室(CSCS).     

中国锤角叶蜂科一新纪录属及一新种(膜翅目,锤角叶蜂科)

记述了采自中国河北和辽宁的锤角叶蜂科Cimbicidae东锤角叶蜂属1新种:中国东锤角叶蜂Orientabia sinica Wei et Yan,sp.nov.o新种与O.coreana Takeuchi,1927近似,但上唇黑色,前翅C脉和Sc脉端部黑褐色,腹部第1背板黑色具铜色光泽,胸部柔毛黄色,中窝三角形,触角第3节仅微长于其后2节之和,锯鞘侧面观端部圆,具明显的耳形侧突,而O.coreana上唇褐色,前翅C脉和Sc脉黄褐色,腹部第1背板具绿色光泽,胸部毛黑色,中窝倒梯形,触角第3节几乎等长于其后3节之和,锯鞘侧面观端部宽截型.东锤角叶蜂属 Orientabia Malaise,1934是中国新纪录属.     

中国细锤角叶蜂属格氏细锤角叶蜂Leptocimbex grahami种团二新种（膜翅目：锤角叶蜂科）

记述采自中国浙江天目山与湖北神农架的细锤角叶蜂属格氏细锤角叶蜂种团Leptocimbex grahami group 2新种:黑毛细锤角叶蜂L.nigropilosus Yan&Wei sp.nov.和神农架细锤角叶蜂L.shennongjiaensis Yan,Wei&Deng sp.nov.;总结了格氏细锤角叶蜂种团各已知种的特征及关系,并提供了分种检索表.     

中国细锤角叶蜂属两新种（膜翅目：锤角叶蜂科）

记述采自中国湖南和浙江的锤角叶蜂科Cimbicidae细锤角叶蜂属Leptocimbex 2新种:浅窝细锤角叶蜂L.afoveata WeiYan sp.nov.和凹脊细锤角叶蜂L.concavicarina WeiYan sp.nov.。编制了细锤角叶蜂属分种团检索表和L.terrifica种团以及L.gracilentus种团种类检索表。     

双齿锤角叶蜂研究及亚洲锤角叶蜂科分属检索表

根据模式标本和新采集的标本,重新描述了齿锤角叶蜂属和双齿锤角叶蜂Odontocimbex svenhedini Malaise, 1934,其中双齿锤角叶蜂的雌虫是首次报道。简要讨论了齿锤角叶蜂属Odontocimbex 和锤角叶蜂属Cimbex Olivier、壮锤角叶蜂属 Palaeocimbex Semenov以及毛锤角叶蜂属Trichiosoma Leach的区别。重新指定了双齿锤角叶蜂Odontocimbex svenhedini Malaise的正选模。编制了锤角叶蜂科亚洲分布属分属检索表。     

沟角叶蜂属分类研究(膜翅目,叶蜂科)并记一新种

修订了沟角叶蜂属的属征,编制了已知种分种检索表.记述沟角叶蜂属3种,含1新种:红斑沟角叶蜂Casipteryx maculatina sp.nov.,新种触角窝上突、触角基部2节全部、第3节基半部、唇基端半部、上颚背侧大部、翅基片、腹部第3背板桔褐色,前翅翅痣下具烟色横带,2Rs室稍长于1R1 1Rs室之和,腹部背板具金属铜色光泽,单眼后区侧沟显著,触角鞭节长于头宽,第3节约等于其后2节之和,复眼下缘间距等宽于复眼高,体毛稍长于单眼直径等,与本属已知2种均明显不同;此外,新种中胸腹板具强腹刺突,侧板刻纹粗糙不平,无光滑间隙,小盾片尖锥型隆起,后头两侧显著收缩,唇基前缘两侧亚中部具1尖刺突,腹部第2背板两侧黑色,无白斑,前翅2M室长大于宽等与C.stigma Nie et Wei不同;上唇端部具弧形缺口,内眶背面观不明显突出于复眼之外等,与C.roborowskyi(Jakovlev)也不相同.新种模式标本保存于中南林业科技大学昆虫标本馆.     

中国锤角叶蜂科一新记录种

中国锤角叶蜂科一新记录种ＡＮＥＷＲＥＣＯＲＤＯＦＣＩＭＢＩＣＩＤＡＥ（ＨＹＭＥＮＯＰＴＥＲＡ）ＴＯＣＨＩＮＡ￥ＷＡＮＧＦｅｎｇｋｕｉ（Ｄｅｐｔ．ｏｆＰｌａｎｔＰｒｏｔｅｃｔｉｏｎ,ＮｏｒｔｈｗｅｓｔｅｒｎＡｇｒｉｃｕｌｔｕｒａｌＵｎｉｖｅｒｓｉｔｙ,...     

中国锤角细蜂科一新记录属及一新种(膜翅目:锤角细蜂科)

首次报道曲柄锤角细蜂属Vadana Rajmohana et Narendran,2000在我国分布,并记述采自广东的1新种:皱胸曲柄锤角细蜂Vadana rugosa,sp.nov..模式标本保存在华南农业大学膜翅目标本室.皱胸曲柄锤角细蜂Vadana rugosa,新种(图1～4)本新种与分布于印度的Vadana ...     

片角叶蜂属研究及四新种记述(膜翅目,叶蜂科,平背叶蜂亚科)

对膜翅目叶蜂科平背叶蜂亚科的片角叶蜂属Indostegia Malaise进行了系统研究,描述了分布于中国川滇黔地区的4个新种:多齿片角叶蜂Indostegia multidenticula sp nov,短角片角叶蜂I brevicornis sp.nov,黑股片角叶蜂I.nigrofemorata sp nov.和短刃片角叶蜂I.breviserrula sp.nov..基于新的材料重新描述了片角叶蜂属的属征,编制了片角叶蜂属分种检索表.新种模式标本分别保存于中南林学院昆虫标本室和中国科学院动物研究所.     

中国平背叶蜂族一新属新种(膜翅目,叶蜂科,平背叶蜂亚科)

记述了中国膜翅目叶蜂科平背叶蜂亚科平背叶蜂族1新属新种:红环申氏叶蜂Shenia rufocincta Wei et Nie,sp.nov.新属Shenia Wei与Apethymorpha Wei(1997)稍有些类似,但唇基和唇基上区十分平坦,唇基缺口较浅,上唇小,颚眼距明显宽于单眼直径,触角窝上突显著发育,触角第2节窄长,后翅Rs室封闭,后足跗节显著长于胫节,基跗节显著短于其后4节之和等,与后者差别较大.本属唇基平坦,缺口很浅,上唇甚小,颚眼距很宽,触角第2节长大,触角窝上突显著发育,前翅具4肘室,cu-a脉基位,后翅臀室具长柄,Rs和M室均封闭,R1室无附室等,可以与平背叶蜂族各属相鉴别.该种模式标本采自河南省嵩县白云山.模式标本保存于中南林学院昆虫标本室.     

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.