Two new species of Simulium (Montisimulium)(Diptera : Simuliidae) from Northern Thailand

Abstract

Two new species of Simulium (Montisimulium), S. (M.) merga sp. nov. and S. (M.) surachaii sp. nov., are described based on specimens collected at high elevation (2,560m above sea level) in Doi Inthanon National Park, Northern Thailand. Simulium (M.) merga sp. nov. (known for female, male, pupa and mature larva) is distinguished from all the known species of the subgenus by the large paired elements of the pupal gill with 14 slender filaments. Simulium (M.) surachaii sp. nov. (only the female adult is known) is easily distinguished from S. (M.) merga by the much smaller claw tooth.