A new species of Simulium (Simulium)(Diptera : Simuliidae) from Thailand

Abstract

Simulium (Simulium) bullatum sp. nov. is described based on reared female adult and pupal specimens collected in Northern Thailand. This new species is assigned to the multistriatum species-group of the subgenus Simulium (Simulium), and is easily distinguished from other known species of this species-group by the pupal gill with an extraordinarily large unpigmented organ at its base, as well as the arrangement of the eight gill filaments.