Descriptions of the male, pupa and larva of Simulium (Gomphostilbia) novemarticulatum (Diptera: Simuliidae) from Peninsular Malaysia and Thailand

Abstract

The male, pupa and larva of Simulium (Gomphostilbia) novemarticulatum Takaoka and Davies, 1995 are described morphologically on the basis of specimens collected from Peninsular Malaysia (type country) and southern Thailand. This species is very similar to S. (G.) charlesi Takaoka, 2008 from Sarawak but readily distinguished in the male by the slender style, in the pupa by the ventral paired filaments of the gill of almost the same size, and in the larva by the bifid dark thick setae on the dorsal and dorsolateral surfaces of abdominal segments 5-8. The difference between S. (G.) novemarticulatum and S. (G.) charlesi, as well as the identification of Thai specimens as S. (G.) novemarticulatum, is confirmed molecularly.