1.A new species of the Simulium (Simulium) crocinum species-group (Diptera: Simuliidae) from Vietnam
Takaoka, H. ; Ya&rsquo ; cob, Z. ; Sofian-Azirun, M. ; Chen, C.D. ; Low, V.L. ; Lau, K.W. ; Pham, X.D.
Tropical Biomedicine 2019;36(1):245-251
A new black fly species, Simulium yukawai, is described on the basis of one
female and its pupal exuviae from Vietnam. This new species is placed in the S. crocinum
species-group of Simulium (Simulium) (Diptera: Simuliidae). It is characterized in the female
by the paraproct covered with 48–50 distinct hairs on its ventral and lateral surfaces, and in
the pupa by the frons and most of the thorax bare, gill with six dark filaments in three pairs
closely arising from the base, of which the two outer filaments of the dorsal and middle pairs
are much longer than other filaments, abdomen with distinct spine-combs on the dorsal
surface of segments 7–9, and cocoon wall-pocket shaped, with a large anterolateral window
on each side. Taxonomic notes are given to separate this new species from related species.
This species is the fourth member of the S. crocinum species-group known from Vietnam.
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