中国毛食蚜蝇属研究及二新种记述(双翅目,食蚜蝇科)

2001～2003年作者对秦巴山区食蚜蝇科昆虫调查,发现中国毛食蚜蝇属Dasysyrphus 2新种,模式标本保存于陕西理工学院生物系陕西省资源生物重点实验室动植物标本馆.文中给出中国已知种的检索表.     

中国长角食蚜蝇属一新种及一新纪录种(双翅目,食蚜蝇科)

记述了中国长角食蚜蝇属1新种：紫柏长角食蚜蝇Chrysotoxum zibaiensis sp．nov．,模式标本保存于陕西理工学院生物系陕西省资源生物重点实验室动植物标本馆。中国1新纪录种：弓斑长角食蚜蝇Chrysotoxum arcuatum（Linneaus,1758）。 紫柏长角食蚜蝇。新种Chrysotoxum zibaiensis sp．nov．（图1-8） 雌性 未知。 ♂体长12mm,翅长12mm。 正模♂,凤县,2003-06-27;副模1♂,留坝,2003—06—26,霍科科采。 新种近似天台长角食蚜蝇Chrysotoxum tiantaiensis,但新种腹部第1～2背板侧缘黄褐色区域宽,第3背板几乎整个黄褐色,第4背板侧缘黄褐色,第2、4、5背板后缘黄褐色,雄性尾器不同,新种尾器被毛黄褐色。 词源：新种种名以模式产地命名。 弓斑长角食蚜蝇Chrysotoxum arcuatum（Linneaus,1758）中国新纪录 观察标本：1♀,吉林长白山,1977-08-03～12。 国外分布：伊郎,蒙古,日本,欧洲,前苏联。     

中国优食蚜蝇属六新种记述(双翅目:食蚜蝇科)

本文记述我国优食蚜蝇属Eupeodes(syn.Metasyrphus)6新种。属下分类采取Vockeroth(1969,1986)的分亚属概念。文中记述的新种全部属于优食蚜蝇亚属Eupeodes(s.str.),并将本亚属内其他5种食蚜蝇重新组合,同时对有些种的中名也作了相应修改。新种模式标本保存于上海农学院。 新组合种:1.硕翅优食蚜蝇Eupeodes(Eupeodes)macropterus(Thomson),1869     

中国食蚜蝇科一新属二新种记述(双翅目,食蚜蝇科)

作者于2002年在秦岭山区进行食蚜蝇科昆虫调查时,发现食蚜蝇科昆虫1新属2新种,记述如下.新种模式标本保存于陕西理工学院陕西省资源生物重点实验室标本馆.平背食蚜蝇属,新属Lamellidorsum gen.nov.复眼裸,颜面及额黄色,面中突小而钝圆.触角黄色,第3节近圆形.胸部背面黑色,具青铜色光泽,两侧暗黄色.小盾片黄色,至少两侧前角被黄毛,中胸上前侧片前低平部缺直立长毛,腹侧片上、下毛斑全长宽的分开.后胸腹板裸,后足基节后腹端角缺毛簇.翅面被微毛,无裸区,翅后缘具一列间隔均匀的骨化黑色小点.腹部狭长,两侧近平行,第3、4背板前部具宽黄带.雄性背针突侧面观近三角形,舌状突顶端尖,与侧臂等长.上叶呈半月形.阳茎端背面平且向两侧扩展呈方形,两侧近端部收缩.阳茎基的腹侧侧扁,后端下部向两侧略扩展.模式种:黄毛平背食蚜蝇,新种Lamellidorsum piliflavum sp.nov.新属近似于狭腹食蚜蝇属Meliscaeva Frey及美蓝食蚜蝇属Melangyna Verrall.与前者的区别是中胸上前侧片前低平部无直立长毛,与后者的区别是翅后缘具一列间隔均匀的骨化黑色小点,腹部第3～4背板前部具宽黄带.雄性尾器不同.黄毛平背食蚜蝇,新种Lamellidorsum piliflavum sp.nov.(图1～7)雄性头部半球形.头顶黑色,被暗黄色毛,单眼三角被黑毛.额暗黄色,基部覆黄粉,被黑毛,中部被黄毛,额角约50°.颜面暗黄色,覆黄粉及黄毛,面中突小而圆,裸.颊部暗褐色,被黄毛.触角暗黄色,第3节长约等于其高,端部宽圆,触角芒棕黄色裸,基部1/3较粗,被微毛,端部约2/3细.中胸背板黑色,具青铜色光泽,两侧暗黄色,被棕黄色毛,小盾片黄色,被黄毛,盾下缨密,棕黄色.胸部侧板黑色,中域覆灰粉,被暗黄色毛.中胸上前侧片前低平部缺直立长毛,腹侧片上、下毛斑全长宽的分离.后胸腹板裸,后足基节后腹端角缺毛簇.足主要棕黄色,被黄毛.翅面被微毛,痣棕黄色,翅后缘具一列间隔均匀的骨化黑色小点.腹部两侧平行,黑色.第2背板两侧具长三角状黄斑.第3背板基部具宽黄带,长大于背板长的2/3.第4背板基部黄带约为背板长的1/2,背板后缘具黄边.第5背板黄色.露尾节黑色.第1背板被棕黄色毛,第2、3背板被毛同底色,第4背板及其后部各节被黑毛,第4背板黄带两侧被黄毛.雄性尾器,暗黑色.尾须黄色,被黄毛.第9背板暗黑 色.背针突暗黑色,被灰白色毛,角钝圆,腹侧缘及内侧表面端部被短刺毛,外侧表面中央略下陷,外表面的内侧部平,呈半月形.第9腹板舌状突发达.上叶半月形,背侧及后侧黑色,外表面顶端有狭缝.阳茎端背面平且向两侧扩展呈长方形,两侧近端部收缩.阳茎基的腹侧侧扁,后端下部向两侧略扩展.阳茎表皮内突左右侧扁.雌性 未知.♂体长9.5mm,翅长8.0mm.正模♂,2002-09-01,陕西眉县(红河谷,海拔1000 m),霍科科采.黑毛平背食蚜蝇,新种Lamellidorsum pilinigrum sp.nov.(图8～11)雄性 未知.♀体9.5mm,翅长8.0mm.正模♀,2002-09-01,陕西眉县(红河谷,海拔1000m),霍科科采.新种与黄毛平背食蚜蝇近似,但其小盾片被黑毛,第2背板具黄带,黄带中央具三角形黑斑,后端不达黄带后缘,后足腿节及胫节中部黑褐色.     

长白山地区食蚜蝇科二新种记述(双翅目,食蚜蝇科)

在整理吉林省长白山地区的食蚜蝇标本时,发现2新种,分别为拟食蚜蝇属1新种,郑氏拟蚜蝇Parasyrphus zhengi sp.nov.,新种近似直带拟蚜蝇Parasyrphus lineola(Zetterstedt,1843),但新种复眼裸,翅暗黑色,足被黑毛,中足胫节端部黑色;长角蚜蝇属1新种,黑缘长角蚜蝇Chrysotoxum nigrimarginatum sp.nov.,新种近似侧宽长角蚜蝇Chrysotoxum fasciolatum(De Geer,1776),与C.fasicolatum的主要区别是新种腹部背板侧缘黑色,触角3节长度之比为1∶1∶4,后者腹部背板黑、黄相间,触角3节长度之比(背面观)约为0.8∶1.0∶3.0。本文除记述新种外,同时提供其特征图。模式标本保存在陕西理工学院动植物标本馆。     

四川青城山优食蚜蝇属二新种记述（双翅目：食蚜蝇科）

本文记述四川青城山优食蚜蝇属Eupeodes 2新种:青优食蚜蝇Eupeodes (Eupeodes) qingchengshanensis和小优食蚜蝇Eupeodes(Eupeodes)parvus,均属于Eupeodes s.str.,亚属。模式标本保存于上海农学院昆虫标本室。     

秦巴山区食蚜蝇亚科昆虫的初步调查（Ⅰ）（双翅目：食蚜蝇科）

通过2001～2003年对秦巴山区食蚜蝇亚科昆虫的调查,结合整理陕西师范大学生命科学院及陕西理工学院生物系馆藏标本,初步鉴定出该地区食蚜蝇亚科昆虫5族24属56种,包括2新种、1中国新记录种、37陕西省新记录种及2个末定种。文中给出种类分布、新种描述及新记录种的主要特征,模式标本保存于陕西师范大学动物研究所。     

河北大学博物馆馆藏食蚜蝇亚科分类研究(双翅目,食蚜蝇科,食蚜蝇亚科)

在系统整理河北大学博物馆馆藏食蚜蝇科Syrphidae昆虫标本的基础上,鉴定出中国食蚜蝇亚科Syrphinae昆虫4族21属41种,其中5新种:直带垂边食蚜蝇Epistrophe rectistrigata sp.nov.,黑龙江美蓝食蚜蝇Melangyna heilongjiangensis sp.nov.,秦巴细腹食蚜蝇Sphaerophoria qingbaensis sp.nov.,秦岭细腹食蚜蝇Sphaerophoria qinglinensis sp.nov.和长白山食蚜蝇Syrphus changbaishanicus sp.nov..新种正模标本保存于河北大学博物馆,副模标本保存于陕西理工学院陕西省资源生物重点实验室.     

秦巴山区食蚜蝇亚科昆虫的初步调查(I)(双翅目:食蚜蝇科)

通过2001~2003年对秦巴山区食蚜蝇亚科昆虫的调查,结合整理陕西师范大学生命科学院及陕西理工学院生物系馆藏标本,初步鉴定出该地区食蚜蝇亚科昆虫5族24属56种,包括2新种、1中国新记录种、37陕西省新记录种及2个末定种。文中给出种类分布、新种描述及新记录种的主要特征,模式标本保存于陕西师范大学动物研究所。     

中国食蚜蝇属一新种记述(双翅目：食蚜蝇科)

中国食蚜蝇属一新种记述（双翅目：食蚜蝇科）何继龙,储西平（上海农学院园林环境科学系上海２０１１０１）（江苏省农业科学院植物保护研究所南京２１００１４）食蚜蝇属Ｓｙｐｈｕｓ是Ｆａｂｒｉｃｉｕｓ建立于１７７５年。此时的食蚜蝇属Ｓｙｒｐｈｕｓ（ｓ．１．）是...     

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.     

肝癌中HBV和HCV基因和抗原的分布及意义

采用原位分子杂交方法检测HCV RNA及HBV X基因;采用免疫组织化学方法研究HCV核心抗原,非结构区C33c抗原及HBxAg在肝细胞肝癌中的定位及分布.结果表明(1)HCV RNA、HBV X基因在肝细胞肝癌组织检出率分别为40%(55/136)和82%(112/136).HCV RNA定位于癌细胞的胞浆内,阳性细胞呈散在、灶状及弥漫分布三种形式;HBV X基因在肝癌细胞中的分布呈胞浆型、核型及核浆型,阳性细胞也呈上述三种分布形式;(2)HCV C33c抗原、核心抗原在肝细胞肝癌中的阳性率为81%(133/164)及86%(141/164).C33c抗原定位于癌细胞及肝细胞的胞浆内;核心抗原既定位于癌细胞核中,又可定位于胞浆中.C33c抗原阳性细胞以灶状分布为主;而核心抗原阳性细     

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.