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.     

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.     

Comparative morphology of the carpel in the Liliaceae: Hewardieae, Petrosavieae, and Tricyrteae

The young pistils in the melanthioid tribes, Hewardieae, Petrosavieae and Tricyrteae, are uniformly tricarpellate and syncarpous. They lack raphide idioblasts. All are multiovulate, with bitegmic ovules. The Petrosavieae are marked by the presence of septal glands and incomplete syncarpy. Tepals and stamens adhere to the ovary in the Hewardieae and the Petrosavieae but not in the Tricyrteae. Two vascular bundles occur in the stamens of the Hewartlieae and Tricyrtis latifolia. Ventral bundles in the upper part of the ovary of the Hewardieae are continuous with compound septal bundles and placental bundles in the lower part. Putative ventral bundles occur in the alternate position in the Tricyrteae and putative placental bundles in the opposite. position in the Petrosavieae. The dichtomously branched stigma in each carpel of the Tricyrteae is supplied by a bifurcated dorsal bundle.     

Enterovirus 71 3C proteolytically processes the histone H3 N-terminal tail during infection

Highlights
1. The N-terminal tail of histone H3 is specifically cleaved during EV71 infection.
2. Viral protease 3C is identified as a protease responsible for proteolytically processing the N-terminal H3 tail.
3. Our finding reveals a new epigenetic regulatory mechanism for Enterovirus 71 in virus-host interactions.     

Detection of EBV and HHV6 in the Brain Tissue of Patients with Rasmussen’s Encephalitis

Rasmussen’s encephalitis (RE) is a rare pediatric neurological disorder, and the exact etiology is not clear. Viral infection may be involved in the pathogenesis of RE, but conflicting results have reported. In this study, we evaluated the expression of both Epstein-Barr virus (EBV) and human herpes virus (HHV) 6 antigens in brain sections from 30 patients with RE and 16 control individuals by immunohistochemistry. In the RE group, EBV and HHV6 antigens were detected in 56.7% (17/30) and 50% (15/30) of individuals, respectively. In contrast, no detectable EBV and HHV6 antigen expression was found in brain tissues of the control group. The co-expression of EBV and HHV6 was detected in 20.0% (6/30) of individuals. In particular, a 4-year-old boy had a typical clinical course, including a medical history of viral encephalitis, intractable epilepsy, and hemispheric atrophy. The co-expression of EBV and HHV6 was detected in neurons and astrocytes in the brain tissue, accompanied by a high frequency of CD8⁺ T cells. Our results suggest that EBV and HHV6 infection and the activation of CD8⁺ T cells are involved in the pathogenesis of RE.     

Perinatal Vertical Transmission of Chikungunya Virus in Ruili,a Town on the Border between China and Myanmar

正Dear Editor,Chikungunya virus (CHIKV), an arbovirus in the family of Togaviridae, genus Alphavirus, is transmitted by the A.aegyptii or A. albopictus mosquito, and causes disease in humans characterized by fever, rash, and arthralgia (Silva and Dermody 2017; Suhrbier 2019). It was first reported in 1953 in Tanzania, and caused only a few outbreaks and sporadic cases in Africa and Asia in last century. However, in the epidemic in 2004, CHIKV acquired mutations that conferred enhanced transmission by the A. albopictus mosquito(Schuffenecker et al. 2006). Since then, it has successively caused outbreaks in Africa, the Indian Ocean, South East Asia, the South America, and Europe (Zeller et al. 2016).     

Development of a Novel Reverse Transcription Loop-Mediated Isothermal Amplification Method for Rapid Detection of SARS-CoV-2

In conclusion, the novel visual RT-LAMP assay is a simple, rapid, and sensitive approach for detection of SARS-CoV-2, and it is ready for application in primary care and community hospitals or health care centers, and even patients' own houses in response to the current SARS-CoV-2 epidemic because the assay does not require sophisticated equipment and skilled personnel. Furthermore, it is also ready to be used in fields for screening samples from wild animals and environments to facilitate the identification of potential intermediate hosts that mediate the cross-species transmission of SARS-CoV-2 from bats to humans.