海南省细须螨属二新种（蜱螨亚纲：细须螨科）

本文对采自海南省细须螨科，１９１３、细须螨属，１８７５的种，儋县细须螨，新种Ｔｅｎｕｉｐａｌｐｕｓ ｄａｎｘｉａｎｅｎｓｉｓ ｓｐ．ｎｏｖ．和三亚细须螨，新种Ｔｅｎｕｉｐａｌｐｕｓ ｓａｎｙａｅｎｓｉｓ ｓｐ。ｎｏｖ。进行详细功述，并与近种进行了比较，模式标本保存在沈阳农业大学植保系。     

云南省细须螨属一新种（蜱螨亚纲：细须螨科）

本文对采自云南省的细须螨科Ｔｅｎｕｉｐａｌｐｉｄａｅ Ｂｅｒｌｅｓｅ，１９１３细须螨属Ｔｅｎｕｉｐａｌｐｕｓ Ｄｏｎｎａｄｉｅｕ，１８７５ １新种勐仑细须螨Ｔｅｎｕｉｐａｌｐｕｓ ｍｅｎｇｌｕｎｅｎｓｉｓ ｓｐ．ｎｏｖ．进行详细描记，并与近似种作了比较。模式标本保存在沈阳农业大学植保系。     

胡瓜钝绥螨对太平洋细须螨的捕食效能初步研究

胡瓜钝绥螨Amblyseius cucumeris Oudemans能捕食为害蝴蝶兰的害螨---太平洋细须螨Tenuipalpus pacificus Baker的卵、幼螨、若螨和成螨。室内研究了胡瓜钝绥螨雌成螨对太平洋细须螨卵、幼螨、若螨的捕食功能反应。结果表明,随着太平洋细须螨密度的增加,胡瓜钝绥螨雌成螨对太平洋细须螨的捕食数量也随之上升,捕食功能反应曲线符合Holling II型方程。胡瓜钝绥螨雌成螨对太平洋细须螨卵的控制能力显著强于对幼螨和若螨的控制能力,a/Th值分别为165.8、79.2和63.8。在猎物密度一定时,由于胡瓜钝绥螨个体间存在相互竞争和相互干扰作用,随着捕食螨密度的提高,捕食螨平均捕食量逐渐减少。     

弯须螨属二新种（蜱螨亚纲：长须螨科）

本文记述弯须螨属二新种,乌岩弯须螨,新种;桂林弯须螨,新种。模式标本保存于上海复旦大学环境和资源生物学系。     

国内新记录种太平洋细须螨及其对蝴蝶兰的发生危害调查

蝴蝶兰是兰科植物中最具观赏性的兰花之一。2009-2013年期间,调查发现一种细须螨为害温室大棚中的蝴蝶兰,该螨严重影响蝴蝶兰的品质和经济价值。结合外部形态特征和基于28SrDNA序列特征建立的系统发育树鉴定出该螨为太平洋细须螨Tenuipalpus pacificus Baker。该螨主要分布于热带和亚热带地区,本文首次报道了在中国大陆发现太平洋细须螨危害。蝴蝶兰温室大棚具有适合其生存的有利环境,在我国大陆定殖的可能性较大,必须引起足够的重视。     

麦格氏巨须螨——中国新记录种

记述巨须螨科Cunaxiae巨须螨属Cunaxa1中国新记录种－－麦格氏巨须螨Cunaxa mageei Smiley,1992。     

巴基斯坦为害杧果树的短须螨属一新种(蜱螨亚纲,细须螨科)

在对巴基斯坦杧果种植区苏加堡的杧果树螨类区系研究中,发现短须螨属(蜱螨亚纲：细须螨科)1新种：礼短须螨。文中记录并描述了该新种。新种的背饰特点是：前背中侧近分颈沟处具网状纹、外侧具纵向条纹;具6对末体背侧毛。雄螨 未采到。正模♀,1994年1月1日采自巴基斯坦,苏加堡杧果园的落叶中;副模1,1994年11月3日采自马尔坦南3km处的杧果树叶,曼苏采。模式标本保存于农业大学农业昆虫系螨类研究室,费沙拉堡,巴基斯坦。新种的背饰独特,略与短须螨属中具7对末体背侧毛的种相像,但具6对末体背侧毛的种皆无此种背饰。     

长须螨属一新种和一新纪录（蜱螨亚纲：长须螨科）

本文记述长须螨属一新种和一新纪录。天目长须螨，新种Ｓｔｉｇｍａｅｕｓ ｔｉａｎｍｕｅｎｓｉｓ ｓｐ．ｎｏｖ．新种模式标本保存于上海复旦大学环境和资源生物学系。     

中国赤螨两新种（蜱螨亚纲：赤螨科）

醉语言忆述赤螨科２属２新种。朱亭纤赤螨Ｌｅｐｔｕｓ ｚｈｕｉｎｇｅｎｓｉｓ ｓｐ．ｎｏｖ．,外寄生于刺股钩臂叶甲和一种蝉,新种与Ｌ．ｄｒａｃｏ Ｓｏｕｔｈｃｏｔｔ近似,前感毛基部位于骨化程度较低之盾片上,但新种Ｖｓ刚毛位于足Ⅱ膝节上,而不象Ｌ．ｄｒａｃｏ位于足Ｉ膝节上,新种须肢股节上刚毛为披针形,而Ｌ．ｄｒａｃｏ为棒状,以资区别。湖南查丽赤螨Ｃｈａｒｌｅｔｏｎｉａ ｈｕｎａｎｅｎｓｉｓ ｓｐ．ｎｏ     

湿螨属四新种记述及中华湿螨再记述：（蜱螨亚纲：湿螨科）

本文记述湿螨属水螨四种新种：郭氏湿螨Ｈｙｇｒｏｂａｔｅｓ ｇｏｕｓｉ ｓｐ．ｎｏｖ．,贵州湿螨Ｈ．ｇｕｉａｈｏｕｅｎｓｉｓ ｓｐ．ｎｏｖ．,墨缘湿螨Ｈ．ａｔｒｏｖｉｒｅｎｓ ｓｐ．ｎｏｖ．和兴义湿螨Ｈ．ｘｉｎｙｉｅｎｓｉｓ ｓｐ．ｎｏｖ．．文中扼述了它们与近似种的区别。另外。还对中华湿螨Ｈ．ｓｉｎｅｎｓｉｓ Ｕｃｈｉｄｅ Ｉｍａｍｕｒａ作了再描述。     

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.