Simulium

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 : 57-58

publication ID

https://doi.org/ 10.5281/zenodo.170004

DOI

https://doi.org/10.5281/zenodo.5657635

persistent identifier

https://treatment.plazi.org/id/F61F9002-FFE9-7940-BD64-EA50B889D916

treatment provided by

Plazi (2016-04-04 05:59:33, last updated 2024-11-26 23:52:17)

scientific name

Simulium
status

 

Simulium View in CoL View at ENA sp. nr. s heilae Takaoka and Davies 1995

This species belongs to the S. ceylonicum group on the basis of an enlarged basitarsus in the male. The male is similar to that of S. sheilae in the coloration of the hind tibia and basitarsus, which are mostly dark, leaving a pale portion at the base. However, this species differs from S. sheilae by having plate­like terminal hooks in the pupa and minute setae on the larval abdomen. Most larval specimens of S. sp. nr. sheilae had sparse, minute, delicate setae with 2 or 3 branches (rarely unbranched) on the dorsal surface of the posterior abdominal segments ( Fig. 2 View FIGURE 2 H); however, some specimens had mostly unbranched setae and were, therefore, similar to larvae of S. asakoae . The eight gill filaments are similar to those of S. sheilae ( Fig. 3 View FIGURE 3 F). The postgenal cleft is moderately deep, about 3 times as long as the postgenal bridge ( Fig. 4 View FIGURE 4 E). The adult legs also differ in their dark coloration.

For this species, 79 larvae were analyzed. The centromere region of chromosome I is expanded, whereas the centromere regions of chromosomes II and III are not. The IIS arm has the bulge and ring of Balbiani in the same locations as in S. sheilae ( Figure 1 View FIGURE 1 I).

Takaoka, H. & Davies, D. M. (1995) The Black Flies (Diptera: Simuliidae) of West Malaysia. Kyushu University Press, Fukuoka, Japan, 175 pp.

Gallery Image

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.

Gallery Image

FIGURE 2. Photographs of setae on abdominal cuticle of Simulium species in subgenus Gomphostilbia. A, Simulium angulistylum. B, S. decuplum. C, S. dentistylum. D, S. siamense. E, S. sp. A. F, S. asakoae. G, S. sheilae. H, S. sp. nr. sheilae. I, S. novemarticulatum. J, S. sp. B.

Gallery Image

FIGURE 3. Photographs of gill filaments of Simulium species in subgenus Gomphostilbia. A, Simulium angulistylum. B, S. sp. A. C, S. novemarticulatum. D, S. siamense. E, S. sheilae. F, S. sp. nr. sheilae.

Gallery Image

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.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Simuliidae

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Simuliidae

Genus

Simulium