中国5种常见宽广蜡蝉形态比较研究

为了给农林业生产中的宽广蜡蝉属Pochazia常见种类提供准确鉴别依据,补充广翅蜡蝉科Ricaniidae昆虫分类的形态学资料,对5种中国常见的宽广蜡蝉(眼斑宽广蜡蝉P.discreta、圆纹宽广蜡蝉P.guttifera、柿宽广蜡蝉P.sublimata、山东宽广蜡蝉P.shantungensis和阔带宽广蜡蝉P.confuse)的外部形态和雌雄外生殖器结构进行了比较研究。结果表明:这5种宽广蜡蝉在外部形态特征(体色、身体各部分比例及前、后翅斑纹)、雄性外生殖器构造(尾节、肛节、阳茎干)及雌性外生殖器构造(肛节、第一产卵瓣、第三产卵瓣)上既有相似性,又存在一定的种间差异,这些差异特征可作为种间鉴别的分类依据。5种宽广蜡蝉的雌性外生殖器构造均为首次报道,此外,还给出了这5种宽广蜡蝉的整体形态图、局部特征图和雌雄外生殖器特征图,以及在中国分布的10种宽广蜡蝉分种检索表。     

中国蜡蝉科二新纪录种记述(半翅目,蜡蝉总科)(英文)

报道采自中国云南省的蜡蝉科2新纪录种:金黄梵蜡蝉Aphaena aurantia (Hope,1840)和瓦里悲蜡蝉Penthicodes variegata (Guerin-Meneville,1829),对其形态特征作了描述,并提供了成虫形态及雄性外生殖器特征图。研究标本均保存于西北农林科技大学昆虫博物馆。     

中国缘蛾蜡蝉属分类与二新纪录种(半翅目,蛾蜡蝉科)

记述蛾蜡蝉科:Flatidae缘蛾蜡蝉属Salurnis Stal中国2新纪录种:海缘蛾蜡蝉S.hesita Medler,1992和埃缘蛾蜡蝉S.estora Miedler,1992,提供了形态及雄性外生殖器等特征图.制作了本属分布于中国的5个种的分种检索表.     

寡室袖蜡蝉属三新种(同翅目:袖蜡蝉科)

记述寡室袖蜡蝉属Vekunta Distant 3新种：狭额寡室袖蜡蝉V.angusta Wu et Liang,sp.,nov.(印度）,异突寡室袖蜡蝉V.asymmetrica Liang et Wu.sp.nov（中国西藏）及三突寡室袖蜡蝉V.triprotrusa Wu et Liang sp.nov.(中国云南）,记述了各新种的形态特征,并绘制了头部与生殖器特征图。     

A NEW SPECIES OF THE GENUS DICTΥOPHARINA MELICHAR (HEMIPTERA, FULGOROIDEA, DICTYOPHARIDAE) FROM CHINA

记述采自中国海南、贵州、广东的短象蜡蝉属Dictyopharina Melichar(半翅目,蜡蝉总科,象蜡蝉科,象蜡蝉亚科)1新种,即六突短象蜡蝉D.hexasaca sp.nov..编制了短象蜡蝉属分种检索表,提供了新种的鉴别特征图.新种模式标本保存于贵州大学昆虫研究所.     

中国短象蜡蝉属一新种记述(半翅目,蜡蝉总科,象蜡蝉科)

记述采自中国海南、贵州、广东的短象蜡蝉属Dictyopharina Melichar(半翅目,蜡蝉总科,象蜡蝉科,象蜡蝉亚科)1新种,即六突短象蜡蝉D.hexasaca sp.nov.。编制了短象蜡蝉属分种检索表,提供了新种的鉴别特征图。新种模式标本保存于贵州大学昆虫研究所。     

中国蛾蜡蝉科一新记录属并记一新种(半翅目:蛾蜡蝉科:涩蛾蜡蝉族)

报道了中国新记录属长蛾蜡蝉属Gomeda Distant,1906,该属隶属于蛾蜡蝉科Flatidae、涩蛾蜡蝉族Selizini,综述了该属的分类研究历史,并记述1新种——素长蛾蜡蝉Gomeda unicolorata,sp.nov.,提供了新种的形态和雌性外生殖器特征图,编制了本属分种检索表。新种模式标本保存在中国科学院动物研究所。     

基于形态及分子特征的鳖扁蜡蝉长翅型研究

研究了鳖扁蜡蝉属Cixiopsis Matsumura长翅型雌虫的形态和分子特征.通过和该属的模式种,即鳖扁蜡蝉Cixiopsis punctatus Matsumura,1900短翅型的形态比较,发现该长翅型雌虫在形态学方面存在某些差异.为了明确该长翅型雌虫的归属,还测定了该长翅型雌虫和鳖扁蜡蝉短翅型的COI序列,结...     

中国圆顶瓢蜡蝉属回顾及一新种描记（半翅目：蜡蝉总科：瓢蜡蝉科）

对中国圆顶瓢蜡蝉属Thabena Stl,1861进行了分类回顾,共有4种:海南圆顶瓢蜡蝉T.hainanensis(Ran & Liang,2006)(中国海南)、兰坪圆顶瓢蜡蝉T.lanpingensis sp.nov.(中国云南)、黎桃圆顶瓢蜡蝉T.litaoensis(Yang,1994)(中国台湾、海南)和云南圆顶瓢蜡蝉T.yunnanensis(Ran & Liang,2006)(中国云南)。对其中2个种兰坪圆顶瓢蜡蝉T.lanpingensis和黎桃圆顶瓢蜡蝉T.litaoensis进行了描记或重新描记,绘制了特征图。提供了中国圆顶瓢蜡蝉属全部已知种的检索表。     

鳖扁蜡蝉和娇弱鳎扁蜡蝉雌性生殖器的描述(半翅目,蜡蝉总科,扁蜡蝉科)

对扁蜡蝉科(半翅目,蜡蝉总科)中鳖扁蜡蝉Cixiopsis punctatus Matsumura和娇弱鳎扁蜡蝉Tambinia debilis St(a)l的雌性生殖器进行了详细描述,绘制特征图并指明各部分的结构名称.结果表明前者生殖管道属于单开口类型,而后者是双开口类型.雌性生殖器特征可为分类学和系统发育分析提供更多的参考信息.     

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.