中国根瘿蚊属新纪录及两新种记述(双翅目,瘿蚊科)

对根瘿蚊属Rhizomyia Kieffer的属征进行修订,并记述采自云南、贵州、海南和福建的该属两新种,分别命名为细叉根瘿蚊Rhizomyia leptodicrata sp.nov.和新月根瘿蚊Rhizomyia meniscata sp.nov..模式标本保存于南开大学昆虫标本馆.细叉根瘿蚊,新种R阮脚驴h卸todicrata sp.nov.(图1～5,9～13)新种与分布于俄罗斯的俄根瘿蚊R.rossica Mamaev&Zaitzev和塔根瘿蚊兄turr~ormis Fedotova&Sidorenko以及分布中国的新月根瘿蚊Rhiwmyiz meniscata sp.nov.在雄性成虫阳茎上的特征相似,但区别明显:新种雄性成虫阳茎端部具两个细长的尖锐突起,而R.觚豇∞雄性成虫阳茎端部具两个圆突,R.turnformis雄性成虫阳茎端部具两个分叉状的突起,R.meniscata雄性成虫阳茎端部具两个角状尖突.正模♂,云南普洱(思茅)菜阳河保护区(22.48°N,100.58°E;海拔1500m),2002-05-17,卜文俊马氏网捕.副模:1♂,同正模;4♂ ♂,云南普洱(思茅)菜阳河保护区倮倮新寨山(22.48°N,100.58°E),2002-05-23,其它同正模.词源:新种种名leptodicrata为一阴性复合拉丁形容词,意为“细长分叉的”,指该种雄性成虫阳茎端部呈细长分叉状.新月根瘿蚊,新种R阮z埘秒谊meniscata sp.nov.(图6～8,14 ～18)新种与近似种区别如上.正模♂,贵州梵净山(27.5°N,108.4°E;海拔1 350 m),2002-05-29,王新谱马氏网捕.副模:1 ♂,海南坝王岭(19°N,109°E;海拔900 m),1988-05-10,卜文俊灯诱;1♂,福建武夷山桐木七里桥(27.7°N,117.6°E;海拔1000 m),1993-04-30,卜文俊捕.词源:新种种名meniscata为一阴性拉丁形容词,意为“新月形的”,指该种雄性成虫阳茎端部背腹向呈新月形.     

全带瘿蚊属分类学研究及中国一新种记述(双翅目,瘿蚊科)

对全带瘿蚊属Holobremia Kieffer的属征进行修订,编写该属世界分种检索表(雄性),并记述采自云南景东无量山的该属1新种,命名为双突全带瘿蚊Holobremia biprominens sp.nov.,模式标本保存在南开大学昆虫标本馆。双突全带瘿蚊,新种Holobremia biprominens sp.nov.(图1～7)新种与分布于印度的Holobremia cylindrica Kashyap,1987在雄外生殖器的中基瓣及触角未节等特征相似,但区别明显:1)新种阳茎近端部1/8处背面两侧具1对骨化强的伸向端部的角状突,而H.cylindrica无此角状突;2)新种的尾须凹入较深窄,形成两瓣,每瓣长度是其中部宽的1.5～1.6倍;而H.cylindrica尾须中部凹入略宽浅,每瓣长度是其中部宽的1.0～1.1倍。正模♂,云南景东无量山漫湾(24.4°N,100.8°E),海拔2200m,2001-05-29,李军采自蜘蛛网;副模:49♂♂,同正模。模式标本保存在南开大学生命科学学院昆虫标本馆。词源:种名biprominens为一阴性复合拉丁形容词,意为"双突起的",指该种阳茎近端部背面有一对...     

危害芒果叶片的瘿蚊科--中国新纪录属和一新种(双翅目,瘿蚊科)

记述了福建厦门危害芒果叶片的瘿蚊科--中国新纪录属和一新种:普瘿蚊属Procontarinia Kieffer ＆ Cecconi,1906;壮铗普瘿蚊Procontarinia robusta sp.nov..正模♂,福建厦门杏林,2001-09-12,张清源饲养自叶瘿.副模16♂♂,23♀♀,同正模,2001-09-12～16.新种触角鞭节基颈很短,被毛;第1、2鞭节不愈合;抱器基节和端节都不细长;肛下板端部凹陷很浅;虫瘿外面无刺,不呈海胆状等区别于P.echinogalliperda(Mani,1947).模式标本保存于南开大学生物系昆虫标本室.     

中国小角瘿蚊属一新种（双翅目：瘿蚊科）

记述采自我国山东东营的小角瘿蚊属 1新种。模式标本存山东农业大学昆虫标本室。长尾小角瘿蚊 Micromya longicauda Mo,新种 (图 1～ 9)正模♂ ,山东东营 [3 8°5′N,1 1 8°7′E] ,1 993 - -7,墨铁路采自水稻田 ;副模 1♀ 1♂ ,同正模。鉴别特征 :该新种与短节小角瘿蚊 Micromya brevisegmenta Mo较近似 ,与后者主要区别如下 :1 )下颚须第 3节长约为中部宽度的 5.3倍 ;2 )触角 1～ 3鞭节各有 1枚大、斜而弯曲的感觉刺 ;3 )雄虫生殖器节上的尾须宽瓣状 ,瓣近三角形 ,肛下板明显长于尾须。     

浙江端突瘿蚊属一新种记述(双翅目,瘿蚊科)

记述了采自浙江的端突瘿蚊属Epidiplosis 1新种,即长叉端突瘿蚊Epidiplosis furcata sp. nov..正模♂,浙江省西天目山,2000-07-19,墨铁路、刘涛灯诱.该新种与拟丝端突瘿蚊Epidiplosis simulifilifera Mo比较近似,与后者主要区别如下:1)抱器基节各具1叉状端瓣,阳具基侧突骨化,呈"T"形;2)下颚须第3节长约为宽的3.4倍;3)触角末鞭节的端结长为宽的2.5倍;4)体长1.16 mm.     

中国陕西双羽爪瘿螨属二新种(瘿螨总科,羽爪瘿螨科,羽爪瘿螨亚科)

记述在陕西发现的双羽爪瘿螨属2新种:短毛双羽爪瘿螨 Diptacus brevichaetus sp.nov.,寄主是山胡椒Lindera glauca(Sieb.et Zucc.)Bl.(樟科Lauraceae);商州双羽爪瘿螨Diptacus shangzhous sp.nov.,寄主是樱桃Cerasus pseudocerasus (Lindl.)G.Don(蔷薇科Rosaceae).模式标本保存在安康学院农学与生命科学学院.短毛双羽爪瘿螨,新种Diptacus brevichaetus sp.nov.(图1～6)正模♀;副模:7♀♀,5♂♂,2008-07-24,陕西省商南县(33°31′N,110°53′E;海拔780m),金丝峡、谢满超采.寄主为山胡椒Lindera glauca(Sieb.et Zucc.)Bl.(樟科Lauraceae).新种与黄肉楠双羽爪瘿螨Diptacus actinodaphne Wang et Wei,2009相似,但新种背盾板饰有网格;足Ⅰ基节间光滑;生殖盖片基部饰有颗粒,端部饰有12短线予以区别(黄肉楠双羽爪瘿螨D.actinodaphne背盾板饰有不规则短线;足Ⅰ基节饰有线条;雌生殖盖片饰有8～10条纵肋).商州双羽爪瘿螨,新种Diptacus shangzhous sp.nov.(图7～12)正模♀;副模:9♀♀,7 ♂ ♂,2008-08-26,陕西省商州市(33°47′N,109°40′E;海拔870 m),秦王山、谢满超采.寄主为樱桃Cerasus pseudocerasus(Lindl.)G.Don(蔷薇科Rosaceae).新种与樱桃双羽爪瘿螨Diptacus pseudocerasis Kuang et Hong,1990相似,但新种具前叶突;足Ⅰ基节分离,无胸线;基节饰有颗粒和少量短线;雌生殖器盖片基部饰有颗粒,端部光滑予以区别(樱桃双羽爪瘿螨D.pseudocerasis无前叶突;足Ⅰ基节间具胸线,基节光滑;雌生殖器盖片光滑).     

外来种刺槐叶瘿蚊的重要寄生性天敌——刺槐叶瘿蚊广腹细蜂在中国的地理分布

刺槐叶瘿蚊广腹细蜂Platygaster robiniae Buhl and Duso(膜翅目:细蜂科)是我国外来有害生物刺槐叶瘿蚊Obolodiplosis robiniae(Haldeman)(双翅目:瘿蚊科)十分重要的寄生性天敌,为卵-幼虫跨期寄生蜂,专化性强,在自然抑制害虫虫口密度中起着非常重要的作用。为摸清刺槐叶瘿蚊广腹细蜂在我国的地理分布,探讨其与刺槐叶瘿蚊的相互关系,本文根据寄主刺槐叶瘿蚊在我国的分布范围,采用踏查的方法,对全国17个省、市、自治区的29个地区进行了调查。结果显示,刺槐叶瘿蚊广腹细蜂在其寄主分布区都有分布,分布范围在26°35.451′-43°53.482′N,103°51.816′-125°15.969′E,海拔4-1 097 m。     

中国锥瘿蚊属研究(双翅目：瘿蚊科)

记述了中国新纪录属,锥瘿蚊属Pseudoperomyia Jaschhof et Hippa一新种：鹦铗锥瘿蚊Pseudoperomyia psittacephala Li et Bu,sp.nov.,（正模产地：福建武夷山桐木）,及1中国新纪录种：小锥瘿蚊P.humilis Jaschhof et Hippa.（云南云龙）。新种与分布于马来西亚的Pseudoperomyia platystyla Jaschhof et Hippa相近,主要区别为新种生殖基节内突的根部很长;生殖端节形似鹦鹉头的外形;阳茎基钟罩形,中部不缢缩;生殖杆更长。模式标本4均保存于南开大学生物系昆早标本室。     

中国扇瘿蚊属六新种(双翅目,瘿蚊科)

报道了双翅目瘿蚊科中国新纪录属:扇瘿蚊属Rhipidoxylomyia Mamaev 6新种,提出了1新组合:Rhipidoxylomyia concava(Yukawa),comb.nov,编制了扇瘿蚊属世界种类检索表.模式标本保存于南开大学生物系.     

中国异瘿蚊属分类研究(双翅目:瘿蚊科)

记述了中国瘿蚊科1新纪录属异瘿蚊属及一新种：横瓣异瘿蚊Heterogenella transversa.spn.nov.,模式产地云南中甸虎跳峡;中国3新纪录种;达氏异瘿蚊H.dolini Berest(四川理县米亚罗）,短须异瘿蚊H.hybrida Mamaev(内蒙古额尔古纳旗莫尔道嘎）和纵缝异瘿蚊H.linearis Yukawa(云南丽江玉龙山）。文中给出了异瘿蚊属中国已知种类分种检索表。模式标本保存于南开大学生物系昆虫标本室。     

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.