Abstract
Two new species of Simulium (Gomphostilbia) (Diptera: Simuliidae) are described on the basis of reared adult, pupal and larval specimens collected from Southern Western Ghats India. The morphological data of two new species S. (Gomphostilbia) panagudiense sp. n. and S. (Gomphostilbia) kottoorense sp. n. are assigned to the batoense species group in the subgenus Gomphostilbia. S. (Gomphostilbia) panagudiense sp.n. is characterized in the female by having the scutum without longitudinal vitta and arms of the genital fork wide basally and in the pupa by the stalk of ventral pair medium-long. S. (Gomphostilbia) kottoorense sp.n. is characterized by the arm of genital fork tapered near apex in the female and style in medial view 0.63 times as long as coxite in the male. Phylogeny of members in the genus Simulium was reconstructed based on DNA barcoding gene (cytochrome oxidase c subunit I). Tree analysis using new technology and maximum likelihood analyses are congruent with evidence of two new species in the subgenus Gomphostilbia and separated from other species.
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