Higher Institution of Centre of Excellence (HICoE), Tropical Infectious Diseases Research and Education Centre (TIDREC), Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
Postgradulate Department of Zoology, Darjeeling Government College, Darjeeling, West Bengal, India.
Trop Biomed. 2022 Mar 1;39(1):78-85. doi: 10.47665/tb.39.1.018.
The Simulium gombakense species-group, one of the 15 species-groups of the subgenus Gomphostilbia Enderlein, is small, being represented by only 12 species, all of which are distributed in the Oriental Region. It is characterized by the pupal gill composed of an inflated structure and eight or ten slender filaments. Among the 12 species, S. sachini Takaoka & Henry, and S. williei Takaoka & Thapa were originally described from two pupae, and one pupa and two larvae, respectively, from Darjeeling, India. In the present paper, the adult females and males of these species are described for the first time from specimens reared from pupae collected at the type locality. Simulium sachini is distinctive in the female by the claw with a medium-sized basal tooth, and in the male by the somewhat enlarged, spindle- shaped hind basitarsus and ventral plate with its ventral margin much depressed medially, while S. williei is characterized by the small number of male upper-eye (large) facets in 12 vertical columns and 13 or 14 horizontal rows and ventral plate much produced posteroventrally. Taxonomic notes are given to separate these two species in the adult stage from their related species.
冈比亚按蚊种团，是冈比亚按蚊亚属的 15 个种团之一，由 12 个种组成，个体很小，全部分布在东洋区。该种团的特点是蛹期的呼吸瓣由一个膨胀的结构和 8 到 10 根细长的丝组成。在这 12 个种中，S. sachini Takaoka & Henry 和 S. williei Takaoka & Thapa 最初是根据来自印度大吉岭的 2 个蛹和 1 个蛹及 2 个幼虫描述的。在本研究中，首次根据在模式产地采集的蛹饲养的标本，描述了这些种的雌、雄成虫。S. sachini 在雌蚊中以具中大型基齿的爪为特征，在雄蚊中以稍大的、纺锤形的后跗节和腹面盘具中央深凹的腹缘为特征，而 S. williei 的特征是雄虫小眼（大）面的数量少，在 12 列垂直和 13 或 14 行水平，腹面盘很大地后向延伸。分类学注释将这些两个种在成虫阶段与其相关种区分开来。
