西藏自治区蚊虫分类与区系研究Ⅶ.伊蚊属伊蚊亚属和物种在西藏自治区首次发现

Taxonomy and fauna of Culicidae in Tibet Autonomous Region, China Ⅶ. First discovery of Aedes subgenus and species in Tibet

目的调查和了解西藏自治区(西藏)的蚊类区系。方法 2017年8-9月,对藏东南地区各类型孳生地的幼蚊进行调查取样、标本制作和分类鉴定。结果在墨脱县采获1批伊蚊属标本,经鉴定,其中发现有伊蚊亚属(Subgenus Aedes)及那坡伊蚊〔Aedes(Aed.)mubiensis Luh et Shih,1958〕。该亚属和物种首次在西藏地区发现,为当地亚属和蚊种新纪录。那坡伊蚊既往仅见分布于我国西南部的广西壮族自治区、贵州和四川省,它与分布于东北地区的北海道伊蚊〔Aedes(Aed.)esoensis〕很相似,但两者可根据雄蚊抱肢基节端部的形状、中部内缘的长鬃数量多少和背基内缘皱纹区的宽窄等特征予以区分。该文将伊蚊亚属和蚊种的主要形态特征、分布区、孳生环境及其雄蚊尾器结构图等内容分别进行了简述和报道。结论迄今,西藏已知分布有伊蚊属17种。

Objective To investigate the fauna of mosquitoes in Tibet Autonomous Region,China.Methods From August to September,2017,investigation and sampling,specimen preparation,and taxonomic identification were performed for mosquito larvae in various types of breeding sites in southeastern Tibet.Results A batch of Aedes specimens were collected in Motuo and was identified as subgenus Aedes and Ae.(Aed.)mubiensis Luh et Shih,1958,which were discovered for the first time in Tibet Autonomous Region and were the new records of local subgenus and species.Aedes(Aed.)mubiensis was once found only in Guangxi,Guizhou and Sichuan in southwestern China.It is similar to Ae.(Aed.)esoensis in northeastern China.However,the two species can be distinguished according to the shape of the end of male basimere,the number of long bristles near the middle inner margin,and the width of the wrinkle zone on the inner margin of dorsal base.This article briefly describes and reports the main morphological characteristics,distribution area,breeding environment,and male terminalia of this subgenus and mosquito species.Conclusion Up to now,there are 17 known species of Aedes in Tibet.