铁甲科四新种

铁甲科Hispidae包括4亚科,即潜甲亚科Anisoderinae,铁甲亚科Hispinae,丽甲亚科Callispinae及龟甲亚科Cassidinae(陈世骧1973)。潜甲亚科是铁甲科中最原始的类群,它的成虫体表无刺,丽甲过去即包括在此亚科中。本文发表的4新种,其中2种属于潜甲亚科毛唇潜甲属Lasiochila,2种属于丽甲亚科丽甲属Callispa。     

潜织蛾属Locheutis Meyrick 在中国首次报道及一新种记述(鳞翅目：织蛾科)

首次报道了潜织蛾属Locheutis Meyrick 在中国的分布,并记述了一新种：天目潜织蛾L. tianmushana sp. nov.,采自浙江省天目山。该新种与 L. empolaea Meyrick相似,但可通过雄性外生殖器特征区别：该种抱器瓣端部不膨大,具稀疏刚毛;阳茎端基环端部有一堆短刺;阳茎约为抱器瓣的1.5倍长,端部具微刺和疣突。模式标本保存在南开大学生物系。     

潜织蛾属Locheutis Meyrick 在中国首次报道及一新 种记述(鳞翅目：织蛾科)

 首次报道了潜织蛾属Locheutis Meyrick 在中国的分布,并 记述了一新种：天目潜织蛾Ltianmushana sp.nov.,采自浙江省天目山。该新种与 L empolaea Meyrick相似,但可通过雄性外生殖器特征区别：该种抱器瓣端部不膨大, 具稀疏刚毛;阳茎端基环端部有一堆短刺;阳茎约为抱器瓣的1.5倍长,端部具微刺和疣突 。模式标本保存在南开大学生物系。     

巨刺螨属一新种——(蜱螨目:巨刺螨科)

本文记述采自辽宁省的巨刺螨属Macronyssus一新种。新种的正模及1副模标本保存于辽宁省卫生防疫站,另1副模标本保存于中国科学院动物研究所。塔山巨刺螨,新种Macronyssus tashanensis sp.nov. 雌螨(图1—8)体椭圆形,长约750微米,宽460微米。 螯钳内缘无齿。动趾宽阔,端部稍窄,中后部膨大,最宽处为15微米。定趾远端具2     

中国异胸甲属一新种(鞘翅目:铁甲科)

裸异胸甲Javeta maculata Sun,新种 体小而狭;黑色,头部、前胸、足及触角黄棕色,鞘翅中部近侧缘处及翅端末近中缝处各具一黄斑。 头较前胸狭,触角窝之间隆起较平宽。触角靠近口缘,长不及体长之半,端部5节较粗,被毛较密,第1～2节近球形,第3节略长,第4、5节约等长,均短于前节,第6节显较前节短。前胸近方形,前端显然变狭,两侧边缘宽,呈弧形突出,尤以基部2/3     

秃鞘掌铁甲虫的初步研究

<正> 秃鞘掌铁甲虫Platypris melli Uhm.属鞘翅目叶甲科铁甲虫亚科,是鼠科马甲子Paliurusramosissmus的重要害虫。国内对此虫尚无记载。现将笔者的初步研究报道如下。 一、形态特征 成虫 体长6—7毫米,体宽3毫米左右,棕黄色,前胸背板及鞘翅有黑斑。复眼一对,黑色,明显突起。触角丝状,共9节,端部稍膨大,由3节合并。腹部5节。雌虫较雄虫为小。鞘翅侧缘前、后方突出呈掌状,前面的有刺6枚,后面的有5枚;鞘翅盘区有刺及瘤突,其中有大刺3个,2个并列于鞘翅中部,另一个位于鞘翅     

中国趾铁甲虫新种记述

本篇记述的甲虫均隶属于铁甲亚科趾铁甲属(Dactylispa),计有新亚属1个,新种12个,新亚种2个;其中1个种产于越南,其余均为国产。新种和新亚种的模式标本均保藏在中国科学院动物研究所。 趾铁甲是一个大属,已知有300多种,主要分布于东洋及非洲两区。据手头材料,我国亦近百种。由于种类多,变异大,鉴定不易,我们曾把本属分为三个亚属(1961),本文又     

中国短喙扁蝽亚科新种记述(半翅目:扁蝽科)

短喙扁蝽亚科 Mezirinae是扁蝽科中最大的亚科,目前国内已知70余种,隶属于13属。本文着重记述了7个属里的10个新种,其中刺扁蝽属为我国新纪录。新种模式标本(除注明者外),均存于天津自然博物馆。文中所用测量单位为毫米。平截胡扁蝽 Wuiessa truncata,新种(图1—3) 长9.40,前胸背板宽2.44,腹部宽5.00。棕黑色;触角第4节端半部、喙及跗节     

潜叶铁甲及其寄主植物多样性

在国内外已有的文献资料基础上, 分别从世界和中国范围对潜叶类铁甲及其寄主植物的物种多样性进行系统研究。铁甲多样性非常丰富, 世界共计24 族185 属3273 种, 其中中国分布的共10 族32 属272 种, 占世界铁甲的8.3%;世界已报道的潜叶铁甲共383 种, 约占全部铁甲的11.7%, 主要集中在Chalepini 族和Hispini 族。潜叶铁甲的寄主植物种类繁多, 共涉及35 目80 科443 属, 其中以禾本科最多, 其次为菊科、豆科、棕榈科、锦葵科、壳斗科和蔷薇科等。不同潜叶铁甲类群的寄主谱差异明显: 在族级水平, Chalepini 族和Hispini 族的寄主范围最为广泛, 而Hispoleptini族和Prosopodontini 族寄主类群则比较单一; 在属级水平, 以趾铁甲属Dactylispa 寄主植物最多。研究发现, 铁甲在族级和属级阶元的种数与其寄主植物种数、属数和科数均呈现出明显的正相关性, 表明铁甲的种类越丰富, 所需要的寄主植物范围就越广泛, 反之则越狭窄; 不同寄主植物上的潜叶铁甲多样性也有明显不同, 单子叶植物上寄生的铁甲明显多于双子叶, 在科级水平上, 禾本科上潜食的铁甲种类最多, 其次为棕榈科、豆科、姜科以及蔷薇科。     

中国蚋属一新种(双翅目,蚋科)

报道采自东北地区1新种,刺毛蚋S.(S.)siculum sp.nov.,该种隶属于蚋属蚋亚属的淡足蚋组Simulium malyschevi-group.新种主要特征是幼虫第6至8腹节密被分枝扁毛,雌虫食窦无疣突,雄虫抱肢端节基背突仅具强毛而无刺.据此综合特征可与已知的近缘种相区别.     

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.