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.

IF 0.8 4区医学 Q4 PARASITOLOGY

Tropical biomedicine Pub Date : 2023-03-01 DOI:10.47665/tb.40.1.007

H Takaoka, Y Otsuka, M Fukuda, V L Low, Z Ya'cob

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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.

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日本西南群岛模拟蝇(Gomphostilbia)冲绳高冈和模拟蝇科模拟蝇(S. G. tokarense Takaoka)的形态和遗传分析:从S. ceylonicum种群到S. asakoae种群的重新描述和转移。

利用COI基因序列对来自日本西南群岛的Simulium (Gomphostilbia) okinawense Takaoka和S. (G.) tokarense Takaoka进行了形态学检查和遗传分析。重新描述了两种昆虫的雌、雄、蛹和成熟幼虫。形态学检查表明，这两种昆虫都具有中等长的雌性感觉囊，雌性和雄性的径向脉基部有黄色的簇毛(S. (G.) okinawense)或黄色的簇毛混杂着几根至几根黑色的毛(S. (G.) tokarense)，以及中等长的幼虫后裂。然而，雄性腹板的身体(从腹侧看)是平行的(s (g)冲绳)或平行或微窄(s (g) tokarense)，基部不边缘，不同于asakoae种群中的大多数物种。我们的遗传分析表明，s (g) tokarense属于S. asakoae种群，s (g) okinawense与S. asakoae种群的其他成员形成了一个独立的姐妹进化支，具有高bootstrap支持。从形态学和遗传分析的综合结果来看，s (g) okinawense和s (g) tokarense从s (g) ceylonicum种群转移到s (g) asakoae种群。

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来源期刊

Tropical biomedicine 医学-寄生虫学

CiteScore

1.60

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： The Society publishes the Journal – Tropical Biomedicine, 4 issues yearly. It was first started in 1984. The journal is now abstracted / indexed by Medline, ISI Thompson, CAB International, Zoological Abstracts, SCOPUS. It is available free on the MSPTM website. Members may submit articles on Parasitology, Tropical Medicine and other related subjects for publication in the journal subject to scrutiny by referees. There is a charge of US$200 per manuscript. However, charges will be waived if the first author or corresponding author are members of MSPTM of at least three (3) years'' standing.