中国疾蟋螽属二新种记述(直翅目:沙螽科:蟋螽亚科)

记述了中国疾蟋螽属2新种,即指突疾蟋螽Apotrechus digitatus Liu et Bi,sp.nov.和近似疾蟋螽Apotrechus fallax Liu et Bi,sp.nov.。模式标本保存在中国科学院上海昆虫博物馆。     

条螽属和桑螽属雌性发声刺的比较观察

报道了对尖翅条螽Ducetia attenuata Xia et Liu、日本条螽D. japonica (Thunberg)、施氏条螽D. strelkovi Gorochov et Storozhenko和中华桑螽Kuwayamaea chinensis (Brunner)、长翅桑螽K. longipennis Shi et Zheng、札幌桑螽K. sapporensis Mats.et Shir.的雌性发声刺的观察结果。这6个种的雌性发声刺在数量与形态上具较明显的差异。     

贵州剑螽属Xiphidiopsis Redtenbacher（直翅目：蛩螽科）两新种记述

记述了贵州剑螽属二新种,即扩板剑螽Xiphidiopsis tonikosa sp.n ov.和钳尾剑螽X.forcipa sp.nov.扩板剑冬X.tonikosa sp.nov与四川剑螽X.szechwanensis Tinkham,1944和双突剑螽X.biprocera Shi et Zheng,1996较相似,主要区别：1）头部背面具4个分离的纵斑;2）雄性尾须分2支,水平支扩展;3）雌性下生殖板延长,后缘两侧突出。钳尾剑螽X.forcipa sp.nov与双叶剑螽X.biolba B.-Bienko,1962相似,但体较小,雄性第10腹节背板稍向后延伸,端部为2个向腹面弯曲的三角形片,不呈圆柱形。     

中国树螽亚科三新种(直翅目:螽虫斯科)

本文记述树螽亚科Pseudophyllinae 3新种：并脉翡螽Phyllomimus coalitus、长腹突效绯螽Phyllozelus dolichostylus和胫突瘤螽Tegrolcinia mirotitialis。模式标本均保存在中国科学院上海昆虫研究所。     

条螽属和桑螽属雌性发声刺的比较观察

 报道了对尖翅条螽Ducetia attenuata Xia et Liu、日本条 螽D. japonica(Thunberg)、施氏条螽D. strelkovi Gorochov et Storozhenk o和中华桑螽K uwayamaea chinensis(Brunner)、长翅桑螽K. longipennis Shi et Zheng、札 幌桑螽K.sap porensis Mats.et Shir.的雌性发声刺的观察结果。这6个种的雌性发声刺在数量与 形态上具较明显的差异。     

中国蛩螽亚科一新纪录属(直翅目,螽斯科)

报道了中国蛩螽亚科新纪录属和新纪录种,即三岛螽属Tamdaora Gorochov,1998和大三岛螽Tamdaora magnifica Gorochov,1998,并首次描述了该种的雌性。大三岛螽雄性肛上板分为左、右两叶,每叶具1短的上突和1较长的下突,左、右上突基部愈合。雌性产卵瓣背、腹缘光滑,腹瓣稍长于背瓣,端部尖;下生殖板长卵圆形,基缘弧形凹入,侧缘向腹面卷,后缘微凹。     

中国驼螽属两新种（直翅目：驼螽科：驼螽亚科）

记述驼螽属Rhaphidophora Audinet-Serville,1839两新种,四川驼螽Rhaphi-dophora sichuanensis Liu et Zhang,sp.nov。和小殖板驼螽Rhaphidophora minuo-lamellaLiu et Zhang,sp.nov以及中华驼螽Rhaphidophora sinica Bey-Bienko,1962的雌性补充描述。模式标本保存在中国科学院植物生理生态研究所昆虫标本馆。     

中国涤螽属的分类研究（直翅目：螽蟖总科：蛩螽科）

本文报道中国涤螽属Decma Gorochov,1993一新亚属副涤螽亚属Paradecma和一新种双刺副涤螽Decma (Paradecma) bispinosa sp. nov.,并附中国种检索表和缅甸异涤螽Decma (Idiodecma) birmanica (Bey-Bienko, 1971)雌性特征新描述。模式标本保存在中国科学院动物研究所。     

条螽属一新种记述及尖翅条螽雌性描述(直翅目,露螽科)

报道了采自湖北神农架的条螽属Ducetia Stal 1新种,即刺条螽Ducetia spina sp．nov．,同时首次描述了尖翅条螽Ducetia attenuate Xia et Liu雌性的外部形态。模式标本保存于山西师范大学生命科学学院标本室。     

中国蛩螽亚科两新种：直翅目：螽Si总科

本文报道中国蛩螽亚科Ｍｅｃｏｎｅｍａｔｉｎａｅ饰尾螽属Ｃｏｓｍｅｔｕｒａ Ｙａｍａｓａｋｉ,１９８３和剑螽属Ｘｉｐｈｉｄｉｏｐｓｉｓ Ｒｅｄｔｅｎｂａｃｈｅｒ,１８９１各一新种。标本分别采自四川和西藏。模式标体保存在中国科学院上海昆虫研究所。     

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.     

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     

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.     

Entwicklungsgeschichte und Ultrastruktur von Pollenkitt und Exine bei nahe verwandten entomophilen und anemophilen Angiospermensippen derAlismataceae,Liliaceae, Juncaceae,Cyperaceae, Poaceae undAraceae

Some closely related members of the monocotyledonous familiesAlismataceae, Liliaceae, Juncaceae, Cyperaceae, Poaceae andAraceae with variable modes of pollination (insect- and wind-pollination) were studied in relation to the ultrastructure of pollenkitt and exine (amount, consistency and distribution of pollenkitt on the surface of pollen grains). The character syndromes of pollen cementing in entomophilous, anemophilous and intermediate (ambophilous or amphiphilous) monocotyledons are the same in principal as in dicotyledons. Comparing present with former results one can summarize: 1) The pollenkitt is always produced in the same manner by the anther tapetum in all angiosperm sub-classes. 2) The variable stickiness of entomophilous and anemophilous pollen always depends on the particular distribution and consistency of the pollenkitt, but not its amount on the pollen surface. 3) The mostly dry and powdery pollen of anemophilous plants always contains a variable amount of inactive pollenkitt in its exine cavities. 4) A step-by step change of the pollen cementing syndrome can be observed from entomophily towards anemophily. 5) From the omnipresence of pollenkitt in all wind-pollinated angiosperms studied one can conclude that the ancestors of anemophilous angiosperms probably have been zoophilous (i.e. entomophilous) throughout.

     

Identification and Characterization of the First Equine Parainfluenza Virus 5

正Dear Editor,Parainfluenza virus 5 (PIV5), known as canine parainfluenza virus in the veterinary field, is a negative-sense,nonsegmented, single-stranded RNA virus belonging to the Paramyxoviridae family (Chen 2018). The virus was first reported in primary monkey kidney cells in 1954 (Hsiung1972), then it has been frequently discovered in various