Discovery of a new black fly species in the Simulium (Simulium) striatum species-group (Diptera: Simuliidae) from Northeastern Thailand and its phylogenetic relationships with seven Thai related species

Document Type

Article

Publication Date

2-1-2023

Abstract

The female, male, pupa and mature larva of Simulium (Simulium) poolpholi sp. nov. collected from a large and seasonal stream in northeastern Thailand are described. This new species is placed in the S. striatum species -group by the female sternite 8 concave posteromedially in form of the inverted-U shape, ovipositor valve with a ventrally produced process along its inner margin, male ventral plate saddle-shaped, style with a basal pro-tuberance, and pupal gill with 10 filaments. It is morphologically similar to S. (S.) phraense Takaoka, Srisuka & Saeung from northern Thailand by lacking annular ridges on the surface of pupal gill filaments but it is distin-guished from the latter species by the arrangement of pupal gill filaments. Molecular analysis using the fast-evolving nuclear big zinc finger (BZF) gene shows that S. (S.) poolpholi sp. nov. formed a distinct clade, being separated from the seven other Thai species of this species-group by a genetic distance of 1.84-4.55%. Our discovery increases the number of species in the S. striatum species-group in Thailand to nine.

Keywords

Aquatic insects, Biting fly, Fast-evolving nuclear big zinc finger (BZF), gene, Genetic analysis, Biodiversity

Publication Title

Acta Tropica

Divisions

tidrec

Funders

Ministry of Education, Malaysia, under the Higher Institution centre of Excellence (HICoE) niche area vector and vector -borne diseases

Volume

238

Publisher

Elsevier

Publisher Location

RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS

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