Morphological and genetic analyses of Simulium (Gomphostilbia) okinawense Takaoka and S. (G.) tokarense Takaoka (Diptera: Simuliidae) from the Nansei Islands, Japan: redescription and transfer from the S. ceylonicum species-group to the S. asakoae species-group
https://doi.org/10.47665/tb.40.1.007
- Author:
Takaoka, H.
1
;
Otsuka, Y.
2
;
Fukuda, M.
3
;
Low, V.L.
1
;
Ya’cob, Z.
1
Author Information
1. Higher Institution of Centre of Excellence (HICoE), Tropical Infectious Diseases Research and Education Centre (TIDREC), Universiti Malaya, 50603, Kuala Lumpur, Malaysia
2. International Center for Island Studies, Kagoshima University, Korimoto 1-21-24, Kagoshima, 890-8580 Japan
3. Institute for Research Management, Oita University, Idaigaoka 1-1, Hasama, Yufu City, Oita, 879-5593, Japan
- Publication Type:Journal Article
- Keywords:
Simuliidae;
biodiversity;
black fly;
taxonomy.
- From:Tropical Biomedicine
2023;40(No.1):88-100
- CountryMalaysia
- Language:English
-
Abstract:
Simulium (Gomphostilbia) okinawense Takaoka and S. (G.) tokarense Takaoka, both from the Nansei
Islands, Japan, were morphologically reexamined and genetically analysed by using the COI gene
sequences. The female, male, pupa and mature larva of the two species are redescribed. Morphological
reexamination shows that both species are more similar to species in the S. asakoae species-group than
to those in the S. ceylonicum species-group, by having a medium-long female sensory vesicle, yellow tuft
hairs (S. (G.) okinawense) or yellow tuft hairs mixed with a few to several dark hairs (S. (G.) tokarense)
at the base of the radial vein in the female and male, and medium-long larval postgenal cleft. However,
the body of the male ventral plate (viewed ventrally) is parallel-sided (S. (G.) okinawense) or parallelsided or slightly narrowed (S. (G.) tokarense) and not emarginated basally, differing from those of most
species in the S. asakoae species-group. Our genetic analysis shows that S. (G.) tokarense is in the S.
asakoae species-group, and S. (G.) okinawense formed a separate sister clade with other members of
the S. asakoae species-group with high bootstrap support. From the results of morphological and genetic
analysis combined, S. (G.) okinawense and S. (G.) tokarense are transferred from the S. ceylonicum
species-group to the S. asakoae species-group.
- Full text:8.2023my1393.pdf
