Simulium gombakense Takaoka and Davies 1995

Phasuk, J., Chanpaisaeng, J., Adler, P. H. & Courtney, G. W., 2005, Chromosomal and morphological taxonomy of larvae of Simulium (Gomphostilbia) (Diptera: Simuliidae) in Thailand, Zootaxa 1052, pp. 49-60 : 54

Simulium gombakense Takaoka and Davies 1995

Simulium gombakense was described from pharate pupae and mature larvae from West Malaysia ( Takaoka and Davies 1995). The male and pupa were later described by Takaoka (2000). The gill is much inflated with six fingerlike projections and eight slender filaments. The postgenal cleft of the larva is longer than the postgenal bridge ( Fig. 4 B) and the abdominal cuticle is almost bare except the last segment, which has short, colorless, unbranched setae on each side of the anal sclerite.

Four of five larvae were analyzed for major landmarks. The centromere regions are not expanded. In the IIS arm, the ring of Balbiani and the bulge are subterminal ( Fig. 1 D).

Figures

FIGURE 1. Idiograms of chromosome arm IIS for 12 Simulium species in subgenus Gomphostilbia from Khao Yai National Park, showing relative locations of Ce, centromere; RB, ring of Balbiani; Bu, bulge; Sh, shoestring. A, Simulium angulistylum. B, S. decuplum. C, S. dentistylum. D, S. gombakense. E, S. siamense. F, S. sp. A. G, S. asakoae. H, S. sheilae. I, S. sp. nr. sheilae. J, S. novemarticulatum. K, S. sp. B. L, S. sp. C.

FIGURE 4. Photographs of postgenal clefts of Simulium species in subgenus Gomphostilbia. A, Simulium asakoae. B, S. gombakense. C, S. sheilae. D, S. dentistylum. E, S. sp. nr. sheilae. F, S. sp. A.