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Hiroyuki Takaoka - One of the best experts on this subject based on the ideXlab platform.
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three new species of the Simulium Simulium striatum species group diptera simuliidae from thailand with their phylogenetic relationships
Acta Tropica, 2020Co-Authors: Kittipat Aupalee, Wichai Srisuka, Atiporn Saeung, Masako Fukuda, Anuluck Junkum, Benjawan Pitasawat, Hiroyuki TakaokaAbstract:Three new species of black flies from Thailand, Simulium wangkwaiense, S. tadtonense and S. maeklongkeense, are described based on their adults, pupal exuviae and cocoons. All three new species are assigned to the Simulium (Simulium) striatum species-group, bringing its total number in Thailand to seven. Simulium wangkwaiense sp. nov. is the species formerly called S. quinquestriatum in Thailand. Certain male and pupal morphological characteristics are shown to separate all seven Thai species of this species-group. All of the three new species have been analyzed genetically for their phylogenetic relationships, with three known related species (except for S. thailandicum), by using the fast-evolving nuclear big zinc finger (BZF) gene.
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morphological and molecular analyses of Simulium rufibasis diptera simuliidae in thailand
Journal of Medical Entomology, 2019Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Van Lun Low, Atiporn SaeungAbstract:A man-biting black fly species so far regarded as Simulium rufibasis Brunetti in Thailand was morphologically analyzed. It was found to be almost indistinguishable in the female from S. rufibasis sensu stricto but distinguishable in the male by the slender fore basitarsus and abdominal segments 2, 6, and 7 each with a pair of shiny dorsolateral patches, and in the pupa by the absence of spine-combs on abdominal segment 7 and terminal hooks on segment 9. It is described as a new species, Simulium tenebrosum. Taxonomic notes are given to separate it from all 11 known species of the S. rufibasis subgroup of the Simulium (Simulium) tuberosum species-group. An analysis of the COI gene sequences shows that this new species is distantly separated from the closely related species.
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classification annotated list and keys for the black flies diptera simuliidae of peninsular malaysia
Zootaxa, 2018Co-Authors: Hiroyuki Takaoka, Zubaidah Yacob, Mohd SofianazirunAbstract:The classification, annotated list and keys for the black fly species from Peninsular Malaysia are updated. The number of black fly species increased from 38 in 1995 to 62 (including a new species herein described) in 2018. The 62 species are classified in four subgenera of the genus Simulium : one species in Daviesellum , 35 species in Gomphostilbia , five species in Nevermannia and 21 species in Simulium . Species in the latter three subgenera are further placed in species-groups or subgroups. Keys are provided for females, males, pupae and mature larvae. Simulium ( S .) perakense sp. nov. is described and placed in the S. striatum species-group. The males of S . ( G .) decuplum , S . ( G .) tahanense , S . ( S .) malayense , the female of S . ( G .) adleri , and the female and larva of S . ( G .) varicorne are described for the first time. The female, male, pupa and larva of S . ( G .) trangense, the male and pupa of S . ( G .) varicorne and the pupa of S . ( G .) adleri are redescribed. Simulium ( G .) sp. A is identified as S . ( G .) pegalanense . Brief notes for each species are given on morphological characteristics, aquatic habitats and geographical distributions.
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a new species and a new record of the Simulium gomphostilbia gombakense species group diptera simuliidae from thailand
Acta Tropica, 2018Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Van Lun Low, Atiporn SaeungAbstract:Larvae and adults reared from pupae of Simulium (Gomphostilbia) gombakense Takaoka & Davies from eight streams in five provinces of Thailand were genetically analyzed by using cytochrome c oxidase subunit 1 sequences. The material was composed of four lineages, of which lineages 2, 3 and 4 are genetically closely related to one another, but more distantly related to lineage 1, which is equivalent to typical S. (G.) gombakense from Peninsular Malaysia. Lineages 2, 3 and 4, which are morphologically indistinguishable, are designated as genoforms A, B and C within a species complex of S. (G.) paiense sp. nov., which is described based on specimens of lineage 2 (=genoform A). Simulium (G.) paiense sp. nov. is similar to S. (G.) gombakense from Peninsular Malaysia but appears to be barely distinguished by the relative length of the female fore basitarsus. Simulium (G.) thuathienense Takaoka & Sofian-Azirun is newly recorded from Thailand and its male is described for the first time. The female of S. (G.) gombakense is briefly described based on females reared from pupae collected from Peninsular Malaysia.
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a new species of the Simulium Simulium striatum species group diptera simuliidae from thailand and its differentiation from two related species based on a fast evolving nuclear gene
Journal of Medical Entomology, 2018Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Van Lun Low, Atiporn SaeungAbstract:Simulium (Simulium) phraense sp. nov. (Diptera: Simuliidae) is described from females, males, pupae, and larvae from Thailand. This new species is placed in the Simulium striatum species group and is most similar to Simulium (Simulium) nakhonense Takaoka & Suzuki (Diptera: Simuliidae) from Thailand among species of the same species group but is barely distinguished from the latter species by lacking annular ridges on the surface of the pupal gill filaments. The fast-evolving nuclear big zinc finger (BZF) gene has successfully differentiated this new species from its allies, S. (S.) nakhonense and Simulium (Simulium) chiangmaiense Takaoka & Suzuki (Diptera: Simuliidae) of the S. striatum species group. The BZF gene sequences show that this new species is more closely related to S. (S.) nakhonense than to S. (S.) chiangmaiense, further supporting its morphological classification.
Atiporn Saeung - One of the best experts on this subject based on the ideXlab platform.
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three new species of the Simulium Simulium striatum species group diptera simuliidae from thailand with their phylogenetic relationships
Acta Tropica, 2020Co-Authors: Kittipat Aupalee, Wichai Srisuka, Atiporn Saeung, Masako Fukuda, Anuluck Junkum, Benjawan Pitasawat, Hiroyuki TakaokaAbstract:Three new species of black flies from Thailand, Simulium wangkwaiense, S. tadtonense and S. maeklongkeense, are described based on their adults, pupal exuviae and cocoons. All three new species are assigned to the Simulium (Simulium) striatum species-group, bringing its total number in Thailand to seven. Simulium wangkwaiense sp. nov. is the species formerly called S. quinquestriatum in Thailand. Certain male and pupal morphological characteristics are shown to separate all seven Thai species of this species-group. All of the three new species have been analyzed genetically for their phylogenetic relationships, with three known related species (except for S. thailandicum), by using the fast-evolving nuclear big zinc finger (BZF) gene.
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morphological and molecular analyses of Simulium rufibasis diptera simuliidae in thailand
Journal of Medical Entomology, 2019Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Van Lun Low, Atiporn SaeungAbstract:A man-biting black fly species so far regarded as Simulium rufibasis Brunetti in Thailand was morphologically analyzed. It was found to be almost indistinguishable in the female from S. rufibasis sensu stricto but distinguishable in the male by the slender fore basitarsus and abdominal segments 2, 6, and 7 each with a pair of shiny dorsolateral patches, and in the pupa by the absence of spine-combs on abdominal segment 7 and terminal hooks on segment 9. It is described as a new species, Simulium tenebrosum. Taxonomic notes are given to separate it from all 11 known species of the S. rufibasis subgroup of the Simulium (Simulium) tuberosum species-group. An analysis of the COI gene sequences shows that this new species is distantly separated from the closely related species.
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a new species and a new record of the Simulium gomphostilbia gombakense species group diptera simuliidae from thailand
Acta Tropica, 2018Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Van Lun Low, Atiporn SaeungAbstract:Larvae and adults reared from pupae of Simulium (Gomphostilbia) gombakense Takaoka & Davies from eight streams in five provinces of Thailand were genetically analyzed by using cytochrome c oxidase subunit 1 sequences. The material was composed of four lineages, of which lineages 2, 3 and 4 are genetically closely related to one another, but more distantly related to lineage 1, which is equivalent to typical S. (G.) gombakense from Peninsular Malaysia. Lineages 2, 3 and 4, which are morphologically indistinguishable, are designated as genoforms A, B and C within a species complex of S. (G.) paiense sp. nov., which is described based on specimens of lineage 2 (=genoform A). Simulium (G.) paiense sp. nov. is similar to S. (G.) gombakense from Peninsular Malaysia but appears to be barely distinguished by the relative length of the female fore basitarsus. Simulium (G.) thuathienense Takaoka & Sofian-Azirun is newly recorded from Thailand and its male is described for the first time. The female of S. (G.) gombakense is briefly described based on females reared from pupae collected from Peninsular Malaysia.
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a new species of the Simulium Simulium striatum species group diptera simuliidae from thailand and its differentiation from two related species based on a fast evolving nuclear gene
Journal of Medical Entomology, 2018Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Van Lun Low, Atiporn SaeungAbstract:Simulium (Simulium) phraense sp. nov. (Diptera: Simuliidae) is described from females, males, pupae, and larvae from Thailand. This new species is placed in the Simulium striatum species group and is most similar to Simulium (Simulium) nakhonense Takaoka & Suzuki (Diptera: Simuliidae) from Thailand among species of the same species group but is barely distinguished from the latter species by lacking annular ridges on the surface of the pupal gill filaments. The fast-evolving nuclear big zinc finger (BZF) gene has successfully differentiated this new species from its allies, S. (S.) nakhonense and Simulium (Simulium) chiangmaiense Takaoka & Suzuki (Diptera: Simuliidae) of the S. striatum species group. The BZF gene sequences show that this new species is more closely related to S. (S.) nakhonense than to S. (S.) chiangmaiense, further supporting its morphological classification.
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Simulium maleewongae a new species of Simulium gomphostilbia diptera simuliidae from thailand
Journal of Medical Entomology, 2017Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Atiporn SaeungAbstract:Simulium (Gomphostilbia) maleewongae sp. nov. is described based on the adult males and females, their pupal exuviae, and larvae from Thailand. This new species is placed in the Simulium gombakense species-group of Simulium (Gomphostilbia). It is characterized by the female cibarium with a cup-like appendage, male ventral plate deeply depressed ventromedially, pupal gill composed of an inflated structure and eight slender filaments, cone-shaped pupal terminal hooks, and cocoon with an anterodorsal projection. Taxonomic notes are given to separate this new species from 10 other species of the same species-group known from China, India, Malaysia, Thailand, Nepal, and Vietnam. Keys to identify all 11 species of the S. gombakense species-group are provided for females, males, pupae, and larvae.
Wej Choochote - One of the best experts on this subject based on the ideXlab platform.
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seasonal biodiversity of black flies diptera simuliidae and evaluation of ecological factors influencing species distribution at doi pha hom pok national park thailand
Acta Tropica, 2015Co-Authors: Wichai Srisuka, Hiroyuki Takaoka, Masako Fukuda, Yasushi Otsuka, Sorawat Thongsahuan, Kritsana Taai, Wej Choochote, Atiporn SaeungAbstract:This is the first study on the seasonal biodiversity of black flies and evaluation of ecological factors influencing their distribution at Doi Pha Hom Pok National Park, northern Thailand. Larvae were collected from six fixed-stream sites in relation to altitude gradients from May 2011 to April 2013. The water temperature, water pH, conductivity, total dissolved solids (TDS), salt, water velocity, stream width and depth, streambed particle sizes, riparian vegetation, and canopy cover were recorded from each site. Monthly collections from the six sites yielded 5475 last-instar larvae, belonging to 29 black fly species. The most frequently found species from all sites were Simulium asakoae (100%) followed by Simulium yuphae (83.3%), and Simulium chiangdaoense, Simulium gombakense, Simulium phahompokense, Simulium fruticosum, Simulium maeaiense and Simulium fenestratum (66.6%). Of the 5475 last-instar larvae, S. maeaiense (19.3%), S. chiangdaoense (15.8%) and S. asakoae (14.8%), were the three most abundant species. The Shannon diversity index (H) at the six sites with different altitudes of 2100m, 2000m, 1500m, 1400m, 700m, and 500m above mean sea level, were 2.042, 1.832, 2.158, 2.123, 1.821 and 1.822, respectively. The Shannon index and number of taxa in the cold season were higher than those in the rainy and hot seasons. Principal component analysis (PCA) indicated that at least three principal components have eigen values >1.0 and accounted for 93.5% of the total variability of ecological factors among sampling sites. The Canonical correspondence analyses (CCA) showed that most species had a trend towards altitude, canopy cover, riparian vegetation and water velocity.
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a new species and species group of Simulium Simulium diptera simuliidae from thailand
Journal of Medical Entomology, 2014Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Yasushi Otsuka, Wej ChoochoteAbstract:ABSTRACT Simulium (Simulium) atipornae sp. nov. is described from females, males, pupae, and larvae in Thailand. This new species is characterized in the female by the claw with a small subbasal tooth, ovipositor valve triangular with its inner margin nearly straight; in the male by the style with a short subbasal protuberance and ventral plate Y-shaped, with toothed posterior margin; and in the pupa by the head and thoracic integument almost bare and gill with six filaments. Taxonomic notes are given to compare this new species with nine related species. A new species-group, the christophersi species-group, is proposed to accommodate S. atipornae sp. nov. and nine related species.
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Simulium asioSimulium furvum a new species of black fly diptera simuliidae from thailand
Journal of Medical Entomology, 2013Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Atiporn Saeung, Wej ChoochoteAbstract:Simulium (AsioSimulium) furvum sp. nov. (Diptera: Simuliidae) is described from female, male, pupal, and larval specimens collected from Maewa National Park, Lampang Province, Thailand. This new species represents the fourth member of the subgenus AsioSimulium Takaoka & Chochoote, one of two small black fly subgenera endemic in the Oriental Region. It is characterized by a pear-shaped spermatheca in the female; a ventral plate in the male with a laterally compressed median keel directed ventrally and with a deep notch posteromedially, and aedeagal membrane with stout spines; and by 22 gill filaments in the pupa. Taxonomic notes are provided to separate this new species from three known species, Simulium (AsioSimulium) oblongum Takaoka & Choochote and Simulium (AsioSimulium) wanchaii Takaoka & Choochote, both from Thailand, and Simulium (AsioSimulium) suchitrae Takaoka from Nepal.
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two new species of Simulium nevermannia diptera simuliidae from northern thailand
Tropical Medicine and Health, 2005Co-Authors: Hiroyuki Takaoka, Wej ChoochoteAbstract:Two new species of black flies, Simulium (Nevermannia) fruticosum sp. nov. and S. (N.) chiangklangense sp. nov. are described on the basis of samples collected in northern Thailand. These new species are assigned to the feuerborni species-group of the subgenus Simulium (Nevermannia), and are easily distinguished from S. (N.) feuerborni Edwards, the only species of the same group known thus far in Thailand, by their simple cocoon without any anterodorsal projection.
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a new species of Simulium Simulium from northern thailand diptera simuliidae
Tropical Medicine and Health, 2005Co-Authors: Hiroyuki Takaoka, Wej ChoochoteAbstract:Simulium (Simulium) phukaense sp. nov. is described on the basis of the observation of females and males (both sexes of adults reared from pupae) and pupae collected in Nan Province, northern Thailand. This new species is assigned to the griseifrons species-group of the subgenus Simulium (Simulium) and is easily distinguished from other known species of this species-group by the simple shoe-shaped cocoon, as well as the arrangement of the six gill filaments.
Wichai Srisuka - One of the best experts on this subject based on the ideXlab platform.
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three new species of the Simulium Simulium striatum species group diptera simuliidae from thailand with their phylogenetic relationships
Acta Tropica, 2020Co-Authors: Kittipat Aupalee, Wichai Srisuka, Atiporn Saeung, Masako Fukuda, Anuluck Junkum, Benjawan Pitasawat, Hiroyuki TakaokaAbstract:Three new species of black flies from Thailand, Simulium wangkwaiense, S. tadtonense and S. maeklongkeense, are described based on their adults, pupal exuviae and cocoons. All three new species are assigned to the Simulium (Simulium) striatum species-group, bringing its total number in Thailand to seven. Simulium wangkwaiense sp. nov. is the species formerly called S. quinquestriatum in Thailand. Certain male and pupal morphological characteristics are shown to separate all seven Thai species of this species-group. All of the three new species have been analyzed genetically for their phylogenetic relationships, with three known related species (except for S. thailandicum), by using the fast-evolving nuclear big zinc finger (BZF) gene.
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morphological and molecular analyses of Simulium rufibasis diptera simuliidae in thailand
Journal of Medical Entomology, 2019Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Van Lun Low, Atiporn SaeungAbstract:A man-biting black fly species so far regarded as Simulium rufibasis Brunetti in Thailand was morphologically analyzed. It was found to be almost indistinguishable in the female from S. rufibasis sensu stricto but distinguishable in the male by the slender fore basitarsus and abdominal segments 2, 6, and 7 each with a pair of shiny dorsolateral patches, and in the pupa by the absence of spine-combs on abdominal segment 7 and terminal hooks on segment 9. It is described as a new species, Simulium tenebrosum. Taxonomic notes are given to separate it from all 11 known species of the S. rufibasis subgroup of the Simulium (Simulium) tuberosum species-group. An analysis of the COI gene sequences shows that this new species is distantly separated from the closely related species.
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a new species and a new record of the Simulium gomphostilbia gombakense species group diptera simuliidae from thailand
Acta Tropica, 2018Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Van Lun Low, Atiporn SaeungAbstract:Larvae and adults reared from pupae of Simulium (Gomphostilbia) gombakense Takaoka & Davies from eight streams in five provinces of Thailand were genetically analyzed by using cytochrome c oxidase subunit 1 sequences. The material was composed of four lineages, of which lineages 2, 3 and 4 are genetically closely related to one another, but more distantly related to lineage 1, which is equivalent to typical S. (G.) gombakense from Peninsular Malaysia. Lineages 2, 3 and 4, which are morphologically indistinguishable, are designated as genoforms A, B and C within a species complex of S. (G.) paiense sp. nov., which is described based on specimens of lineage 2 (=genoform A). Simulium (G.) paiense sp. nov. is similar to S. (G.) gombakense from Peninsular Malaysia but appears to be barely distinguished by the relative length of the female fore basitarsus. Simulium (G.) thuathienense Takaoka & Sofian-Azirun is newly recorded from Thailand and its male is described for the first time. The female of S. (G.) gombakense is briefly described based on females reared from pupae collected from Peninsular Malaysia.
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a new species of the Simulium Simulium striatum species group diptera simuliidae from thailand and its differentiation from two related species based on a fast evolving nuclear gene
Journal of Medical Entomology, 2018Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Van Lun Low, Atiporn SaeungAbstract:Simulium (Simulium) phraense sp. nov. (Diptera: Simuliidae) is described from females, males, pupae, and larvae from Thailand. This new species is placed in the Simulium striatum species group and is most similar to Simulium (Simulium) nakhonense Takaoka & Suzuki (Diptera: Simuliidae) from Thailand among species of the same species group but is barely distinguished from the latter species by lacking annular ridges on the surface of the pupal gill filaments. The fast-evolving nuclear big zinc finger (BZF) gene has successfully differentiated this new species from its allies, S. (S.) nakhonense and Simulium (Simulium) chiangmaiense Takaoka & Suzuki (Diptera: Simuliidae) of the S. striatum species group. The BZF gene sequences show that this new species is more closely related to S. (S.) nakhonense than to S. (S.) chiangmaiense, further supporting its morphological classification.
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Simulium maleewongae a new species of Simulium gomphostilbia diptera simuliidae from thailand
Journal of Medical Entomology, 2017Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Atiporn SaeungAbstract:Simulium (Gomphostilbia) maleewongae sp. nov. is described based on the adult males and females, their pupal exuviae, and larvae from Thailand. This new species is placed in the Simulium gombakense species-group of Simulium (Gomphostilbia). It is characterized by the female cibarium with a cup-like appendage, male ventral plate deeply depressed ventromedially, pupal gill composed of an inflated structure and eight slender filaments, cone-shaped pupal terminal hooks, and cocoon with an anterodorsal projection. Taxonomic notes are given to separate this new species from 10 other species of the same species-group known from China, India, Malaysia, Thailand, Nepal, and Vietnam. Keys to identify all 11 species of the S. gombakense species-group are provided for females, males, pupae, and larvae.
Van Lun Low - One of the best experts on this subject based on the ideXlab platform.
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temporal variation in diversity and community structure of preimaginal blackflies diptera simuliidae in a tropical forest reserve in malaysia
Acta Tropica, 2020Co-Authors: Soosai Peranathan Pavitra, Van Lun Low, Tiong Kai Tan, Yvonne A L Lim, Zubaidah YacobAbstract:Blackflies (Diptera: Simuliidae) are ecologically and medically important insects but they have been understudied in Malaysia. Accordingly, a study on the temporal variation in diversity and community structure of preimaginal blackflies was conducted for the first time in Malaysia. A total of 865 preimaginal blackflies were collected in 120 samplings from five streams across three monsoon seasons from February 2018 until January 2019. Ten species were recorded and most frequently collected species were Simulium cheongi, Simulium vanluni and Simulium jeffreyi. Relatively common species were Simulium roslihashimi, Simulium tani complex and Simulium trangense. No significant changes of rainfall was observed between three monsoon seasons as well as the seasons with species and physiochemical parameters except acidity (pH) (P 20%) indicated that S. vanluni and S. jeffreyi were commonly associated with wider, deeper and fast-flowing streams with low conductivity and larger streambed particle. In contrast, S. cheongi was associated with smaller, slower and small streambed particle. This first extensive bimonthly study has uncovered the species community structure as well as the changes of stream physicochemical parameters over time although they were not greatly and significantly influenced by the monsoon seasons. Species distribution, richness and abundance, however, were highly determined by the stream width, depth and velocity, therefore, were vital in shaping diversity and community structure of preimaginal blackflies.
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morphological and molecular analyses of Simulium rufibasis diptera simuliidae in thailand
Journal of Medical Entomology, 2019Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Van Lun Low, Atiporn SaeungAbstract:A man-biting black fly species so far regarded as Simulium rufibasis Brunetti in Thailand was morphologically analyzed. It was found to be almost indistinguishable in the female from S. rufibasis sensu stricto but distinguishable in the male by the slender fore basitarsus and abdominal segments 2, 6, and 7 each with a pair of shiny dorsolateral patches, and in the pupa by the absence of spine-combs on abdominal segment 7 and terminal hooks on segment 9. It is described as a new species, Simulium tenebrosum. Taxonomic notes are given to separate it from all 11 known species of the S. rufibasis subgroup of the Simulium (Simulium) tuberosum species-group. An analysis of the COI gene sequences shows that this new species is distantly separated from the closely related species.
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a new species and a new record of the Simulium gomphostilbia gombakense species group diptera simuliidae from thailand
Acta Tropica, 2018Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Van Lun Low, Atiporn SaeungAbstract:Larvae and adults reared from pupae of Simulium (Gomphostilbia) gombakense Takaoka & Davies from eight streams in five provinces of Thailand were genetically analyzed by using cytochrome c oxidase subunit 1 sequences. The material was composed of four lineages, of which lineages 2, 3 and 4 are genetically closely related to one another, but more distantly related to lineage 1, which is equivalent to typical S. (G.) gombakense from Peninsular Malaysia. Lineages 2, 3 and 4, which are morphologically indistinguishable, are designated as genoforms A, B and C within a species complex of S. (G.) paiense sp. nov., which is described based on specimens of lineage 2 (=genoform A). Simulium (G.) paiense sp. nov. is similar to S. (G.) gombakense from Peninsular Malaysia but appears to be barely distinguished by the relative length of the female fore basitarsus. Simulium (G.) thuathienense Takaoka & Sofian-Azirun is newly recorded from Thailand and its male is described for the first time. The female of S. (G.) gombakense is briefly described based on females reared from pupae collected from Peninsular Malaysia.
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a new species of the Simulium Simulium striatum species group diptera simuliidae from thailand and its differentiation from two related species based on a fast evolving nuclear gene
Journal of Medical Entomology, 2018Co-Authors: Hiroyuki Takaoka, Wichai Srisuka, Van Lun Low, Atiporn SaeungAbstract:Simulium (Simulium) phraense sp. nov. (Diptera: Simuliidae) is described from females, males, pupae, and larvae from Thailand. This new species is placed in the Simulium striatum species group and is most similar to Simulium (Simulium) nakhonense Takaoka & Suzuki (Diptera: Simuliidae) from Thailand among species of the same species group but is barely distinguished from the latter species by lacking annular ridges on the surface of the pupal gill filaments. The fast-evolving nuclear big zinc finger (BZF) gene has successfully differentiated this new species from its allies, S. (S.) nakhonense and Simulium (Simulium) chiangmaiense Takaoka & Suzuki (Diptera: Simuliidae) of the S. striatum species group. The BZF gene sequences show that this new species is more closely related to S. (S.) nakhonense than to S. (S.) chiangmaiense, further supporting its morphological classification.
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uncovering the mask of the Simulium feuerborni complex diptera simuliidae description of a new pseudocryptic species Simulium pairoti from malaysia
Acta Tropica, 2017Co-Authors: Zubaidah Yacob, Hiroyuki Takaoka, Van Lun Low, Mohd SofianazirunAbstract:A black fly species of the Simulium feuerborni species-group of Simulium (Nevermannia) from Cameron Highland, Peninsular Malaysia, previously regarded as S. feuerborni Edwards, originally described from East Java, is described as Simulium pairoti sp. nov. based on complete life stages. High intraspecific variations in the arrangement of the six pupal gill filaments, length of the stalk of the ventral paired filaments, and length of the anterodorsal projection of the cocoon, are noted in this species. This new species is readily distinguished from its congeners by having the characters of male genitalia with simple lamellate ventral plate, short inwardly-twisted styles, several parameral hooks, and a simple narrow median sclerite. Morphological data reported herein plus the chromosomal and molecular data presented elsewhere support S. pairoti as a novel pseudocryptic species.
