Description of the male of Simulium (Gomphostilbia) binuanense (Diptera: Simuliidae) from Palawan Island, Philippines

摘要

The male of Simulium (Gomphostilbia} binuanense is described for the first time on the basis of males reared from pupae collected from the type locality of Palawan Island in the Philippines. The male of this species is very similar to S. (G.) pegalanense from Sabah, Malaysia but barely distinguished by the number of large upper-eye facets. The investigations on the pupae and larvae of black flies carried out in 2007 and 2008 in Palawan Island in the Philippines have added five more species [four newspecies of Simulium (Gomphostilbia) and one new record of S. (Wallacellum)] to the 16 reported species of simuliids in the island (Takaoka and Tenedero, 2007, 2008 a, b). In the subsequent survey in 2009 several pupae were collected from a small stream under the Binuan Bridge (the type locality of S. (G.) binuanense) and reared to adulthood. Among adults which had emerged, four females and six males were identified as S. (G.) binuanense based on the characteristics of the female and pupa noted by Takaoka and Tenedero (2008a). In this paper, the male of this species is described for the first time.