Simulium (Gomphostilbia) chiangdaoense sp. nov. (Diptera: Simuliidae) from northern Thailand

Abstract

Simulium (Gomphostilbia) chiangdaoense sp. nov.

Two new species of Simulium (Gomphostilbia) (Diptera: Simuliidae) from Cameron’s Highlands, Peninsular Malaysia, with keys to 21 species of the Simulium asakoae species-group

“…Thirteen species from other countries included in the keys are: five species from China, S. (G.) jianfengense An & Long, 1994, S. (G.) laoshanstum Ren, An & Kang, 1998, S. (G.) mengi Chen, Zhang & Wen, 2000, S. (G.) miaolingense Wen & Chen, 2000, S. (G.) yunnanense Chen & Zhang, 2004; one species from Tibet, S. zayuense An, Zhang & Deng, 1990; three species from Taiwan, S. (G.) taitungense Huang & Takaoka, 2011, S. (G.) tuenense Takaoka,1979, S. (G.) sp. (= "metatarsale" sensu Takaoka, 1979); two species from Thailand, S. (G.) chiangdaoense Srisuka, 2009, andS. sp.…”

“…sp. (="asakoae" sensu Jitklang et al, 2008); one species from Indonesia, S. (G.) gyorkosae Takaoka & Davies, 1996; and, one species from Nepal, S. (G.) nepalense Lewis, 1964(Chen & An 2003, Chen & Zhang 2004, Huang et al 2011, Lewis 1964, Takaoka 1979, Takaoka & Davies 1996, Takaoka & Srisuka 2009. The species, that was treated in Thailand as S. (G.) asakoae by Jitklang et al (2008), is regarded to be distinct from S. (G.) asakoae originally described from Peninsular Malaysia since there are differences in several morphological features between Thai and Peninsular Malaysian specimens, as noted in Jitklang et al (2008).…”

Checklist and keys for the black flies (Diptera: Simuliidae) of Thailand

“…The 21 additional species included seven new and 10 newly recorded species (Takaoka and Saito, 1996;Takaoka and Adler, 1997;Takaoka and Kuvangkadilok, 1999;Kuvangkadilok and Takaoka, 2000). The number of black fly species of Thailand has again doubled from 40 to 82 during the first decade of the twenty-first century (Jitklang and Kuvangkadilok, 2007;Jitklang et al, 2008;Pramual and Tangkawanit, 2008;Takaoka, 2001;Takaoka and Choochote, 2004ac, 2005aj, 2006ad, 2007Takaoka et al, 2009Takaoka et al, , 2010aSrisuka, 2009, 2010a d). The number continued to increase to 109 by 2019 (Takaoka and Srisuka, 2011, 2013a, b, 2014ac, 2017af, 2018a, c g, i, 2019Tangkawanit et al, 2018;Thaijerern et al, 2018).…”

Description of a New Species of <I>Simulium</I> (<I>Gomphostilbia</I>) (Diptera: Simuliidae) From Cameron's Highlands, Peninsular Malaysia, With Keys to 18 Species of the <I>Simulium asakoae</I> Species-Group

“…nov. is also distinguished from 10 of 12 known species of the asakoae species-group from other countries: Þve species from China, Simulium (Gomphostilbia) jianfengense An & Long, 1994, Simulium (Gomphostilbia) laoshanstum Ren, An & Kang, 1998, Simulium (Gomphostilbia) Takaoka, 1979, Simulium (Gomphostilbia) sp. (ϭ"metatarsale" sensu Takaoka 1979); one species from Thailand, Simulium (Gomphostilbia) chiangdaoense Takaoka & Srisuka, 2009; and one species from Indonesia, Simulium (Gomphostilbia) gyorkosae Takaoka & Davies, 1996, all of which have the stalk of the ventral pair of Þla-ments longer than the common basal stalk, which is short or medium-long (Chen and An 2003, Chen and Zhang 2004, Huang et al 2011, Takaoka 1979, Takaoka and Davies 1996, Takaoka and Srisuka 2009. Among the two remaining species of the same species-group, Simulium (Gomphostilbia) nepalense Lewis, 1964, which was described only from adult female and male specimens, differs from this new species by the color of the male hind tibia and basitarsus, which are yellow on the basal two-Þfths and on the basal three-tenths, respectively, and the male ventral plate with a ventral margin concave medially when viewed posteriorly (Lewis 1964).…”