Simulium (Simulium) xuandei Takaoka & Pham, 2015

Simulium (Simulium) xuandei Takaoka & Pham (in Takaoka et al., 2015a): 86–93 (Female, male, pupa and larva).

Specimens examined. Three females and two males (all reared from pupae), collected from a stream (width 1.5– 4.0 m, depth 10–20 cm, bottom of pebbles and rocks, water temperature 18.0˚C, exposed to the sun, elevation 107 m, 19˚30’10.540”N/105˚09’17.144”E), moderately flowing near a natural forest, Chau Dinh, Quy Chau, Nghe An Province, northern Vietnam, 11-XII-2015, by H. Takaoka, M. Sofian-Azirun, C.D. Chen & K.W. Lau.

Distribution. Vietnam (Lam Dong and Nghe An)

Remarks. This species was described from Lam Dong Province, southern Vietnam (Takaoka et al. 2015a), and also recorded from Nghe An Province, northern Vietnam by our surveys. The molecular data show that this species includes two additional cryptic taxa (Low et al. 2016).