我国类石蛛科蜘蛛两新种：蜘蛛目：类石蛛科

本文记述产于云南省、湖南省和福建省类石蛛两新种：黑色垣蛛，新种Ａｒｉａｄｎａ ｐｅｌｉｏｓ ｓｐ．ｎｏｖ．；敏捷垣蛛，新种Ａｒｉａｄｎａ ｅｌａｐｈｒｏｓ ｓｐ．ｎｏｖ. 。     

视觉能触发沟渠豹蛛雄蛛对雌蛛的求偶行为

以沟渠豹蛛Pardosa laura成熟雄蛛的求偶延迟时间和触肢伸展次数作为参数,观察研究了雄蛛通过视觉与处女雌蛛拖丝单独和共同诱导情况下的求偶反应,发现视觉是触发雄蛛求偶行为的主要信号,而雌蛛的拖丝则不能单独激发雄蛛的求偶行为,表明雄蛛能够通过视觉接受雌蛛的信号。在此基础上,又测定了雄蛛通过视觉接受亚成体雌蛛、处女雌蛛和交配未产卵雌蛛信号时的求偶反应,发现雄蛛对处女雌蛛和交配未产卵雌蛛的求偶动作次数显著多于亚成体雌蛛,表明雄蛛能够通过视觉区分雌蛛是否成熟,但是仅依靠视觉无法判断雌蛛是否已经交配。本实验表明视觉在沟渠豹蛛雄蛛对雌蛛识别过程中起着非常重要的作用,再次证实狼蛛的视觉比较发达。     

中国微蛛亚科3新纪录属5新纪录种（蜘蛛目：皿蛛科）

记述了采自我国吉林省、新疆维吾尔自治区和湖北省皿蛛科微蛛亚科蜘蛛3新纪录属5新纪录种:双头蛛属,奇异双头蛛,盾大蛛属,尖盾大蛛;微玛蛛属,小突微玛蛛,双舟蛛属,叉胫双舟蛛,胫毛双舟蛛。     

花生田蜘蛛群落的研究

在花生田共采集到蜘蛛41种,隶属于12科、27属。游猎型蜘蛛主要是狼蛛科、跳蛛科、猫蛛科和管巢蛛科的种类,所占比例较高,在春花生田为60.91％～86.21％,秋花生田为50.40％～90.36％。结网蜘蛛主要是皿蛛、球蛛、肖蛸和小型园蛛。在花生的不同生长季节有不同的优势科和优势种。春花生田的优势科是狼蛛科、皿蛛科和猫蛛科,优势种是类水狼蛛、拟环纹豹蛛、脉娲蛛、食虫沟瘤蛛和斜纹猫蛛;狼蛛科、猫蛛科和球蛛科是秋花生田的优势科、脉娲蛛、斜纹猫蛛和八斑鞘蛛为优势种。     

中国狼蛛科的系统发育

运用分支分析法,采用支序分析软件Phylip程序,以盗蛛科和褛网蛛科为外群,从形态、生态等方面选取了18个特征对中国狼蛛11个属(脉狼蛛属未在其列)进行支序分析。分析结果表明,马蛛亚科(包括马蛛属和水狼蛛属)最为原始,潮浪蛛亚科次之;熊蛛属和獾蛛属构成的分支更次,狼蛛亚科和豹蛛亚科构成姊妹群最为进化。所以潮浪蛛属、熊蛛属和獾蛛属应分别从狼蛛亚科中独立出来,皆自成亚科,分别名潮浪蛛亚科和獾蛛亚科。     

花和田蜘蛛群落的研究

在花生田共采集到蜘蛛４１种,隶属于１２科、２７属。游猎型蜘蛛主要是狼蛛科、跳蛛科、猫蛛科和管巢蛛科的种类,所占比例较高,在春花生田为６０．９１～８６．２１％,秋药生田为５０．４０～９０．３６％。结网蜘蛛主要是皿蛛、珠蛛、肖蛸和小型园蛛。在花生的不同生长季节有不同的优势科和优势种。春花生男的优势科是狼蛛科、皿蛛科和猫蛛科,优势种是类水狼蛛、拟环纹豹蛛、脉蜗蛛、食虫沟瘤蛛和斜纹猫蛛;狼蛛科、猫蛛科和球     

中国园蛛7新种（蛛形纲：蜘蛛目）

报道了我国园蛛科7新种,即:云南园蛛Araneus yunnanensis、景洪金蛛Argiopejing hongensis、长垂驼蛛Cyphalonolus elongalus、石门壮头蛛Chorizopes shimenensis、勐海曲腹蛛Cyrlarachne menghaiensis 、文山肥蛛Larinia wenshanensis 和十字亮腹蛛Singa cruciformis。     

湖北省隙蛛属4新种记述（蜘蛛目：暗蛛科）

描述采自湖北省武当山的暗蛛科隙蛛属4新种:武当隙蛛、老营隙蛛、喜悦隙蛛和王氏隙蛛。     

香蕉园蜘蛛群落研究

香蕉园蜘蛛群落组成隶属于１７科４８属７１种。跳蛛科、球蛛科、狼蛛科、肖峭科、皿蛛科和抚蛛科是优势科。种类以跳蛛、数量以抚蛛最多。群落垂直分层结构明显。广西抚蛛与草间钻头蛛,幼豹蛛与类奇异獾蛛分别是植株叶片和地面群落的优势种群。群落多样性地面高于植株。植株层间的相似性高于植株与地面之间的相似性。植株叶片上的蜂蛛与昆虫数量消长相关极显著。     

中国数种熊蛛研究(蜘蛛目:狼蛛科)

记述我国狼蛛科熊蛛属５种,其中２新种为：沟谷熊蛛,三齿熊蛛,１种雄性新发现：湄潭熊蛛１９９３,中国２新纪录种;掠熊蛛富士熊蛛。     

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.     

A Unique Protease Cleavage Site Predicted in the Spike Protein of the Novel Pneumonia Coronavirus (2019-nCoV) Potentially Related to Viral Transmissibility

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     

Curcuminoids as inhibitors of thioredoxin reductase: A receptor based pharmacophore study with distance mapping of the active site

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.     

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.