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Junichi Yukawa - One of the best experts on this subject based on the ideXlab platform.
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sexual isolation between two known intraspecific populations of hartigiola diptera cecidomyiidae that induce Leaf Galls on upper and lower surfaces of fagus crenata fagales fagaceae indicating possible diversification into sibling species
Annals of The Entomological Society of America, 2014Co-Authors: Misako Mishima, Shinsuke Sato, Kiyoshi Tsuda, Junichi YukawaAbstract:ABSTRACT Hartigiola faggalli (Monzen), a cecidomyiid species that induces Leaf Galls on Fagus crenata Blume (Fagales: Fagaceae), was studied to assess the degree of sexual isolation between known intraspecific populations derived from two different gall types. “Upper-type Galls” form on the lateral veins of upper Leaf surfaces, whereas “lower-type Galls” develop between the lateral veins of lower Leaf surfaces. The two populations were distinguished based on slight differences in theirDNAsequences. They coexisted in F. crenata forests. Emergence, swarming, mating, and oviposition occurred sequentially each day and almost simultaneously in both populations. Thus, they were not isolated from each other in time or space. However, 85% of 134 swarming males flew to females of the same population when responding to female sex pheromone. About 92% of 251 mating pairs were homogenic, and IPSI indicated a significantly homogenic mating. The female sex pheromone and male sensitivity to the pheromone seemed to diffe...
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dimocarpomyia a new oriental genus of the tribe asphondyliini diptera cecidomyiidae inducing Leaf Galls on longan sapindaceae
Annals of The Entomological Society of America, 2008Co-Authors: Makoto Tokuda, Junichi Yukawa, Wiwat SuasaardAbstract:A new genus Dimocarpomyia belonging to the subtribe Asphondyliina (Diptera: Cecidomyiidae: Asphondyliini) is erected for Dimocarpomyia folicola Tokuda & Yukawa, a new species to science. Morphological features of the male, female, full-grown larva, and pupa are described. The gall midge induces obovoid Galls on the lower surface of leaves of longan, Dimocarpus longan (Sapindaceae), in Thailand.
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Taxonomy and Molecular Phylogeny of Daphnephila Gall Midges (Diptera: Cecidomyiidae) Inducing Complex Leaf Galls on Lauraceae, with Descriptions of Five New Species Associated with Machilus thunbergii in Taiwan
Zoological science, 2008Co-Authors: Man-miao Yang, Junichi YukawaAbstract:Five new species of the genus Daphnephila (Diptera: Cecidomyiidae: Asphondyliini), D. ornithocephala, D. stenocalia, D. sueyenae, D. taiwanensis, and D. truncicola, all associated with Machilus thunbergii (Lauraceae), are described from Taiwan, and one previously known species, D. machilicola, is redescribed from Japan. Among the five new species, D. truncicola induces stem Galls and the other four species induce Leaf Galls. A molecular phylogenetic analysis based on partial sequences of the mitochondrial cytochrome oxidase subunit I (COI) gene suggests that in this genus the stem-galling habit is a more ancestral state compared to the Leaf-galling habit. Daphnephila seems to be of tropical origin and to have dispersed to Japan through Taiwan.
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shift from non pest to pest status in rhopalomyia foliorum diptera cecidomyiidae a species that induces Leaf Galls on artemisia princeps asteraceae cultivated as an edible plant in okinawa japan
Applied Entomology and Zoology, 2007Co-Authors: Tomoko Ganaha, Nami Uechi, Shinsuke Sato, Keith M Harris, Futoshi Kawamura, Junichi YukawaAbstract:In 2003, many small ellipsoidal or spindle-shaped Leaf Galls were found on Artemisia princeps (Asteraceae) that had been cultivated as an edible crop plant in Okinawa Prefecture, Japan. The Galls were similar to those induced by Rhopalomyia foliorum (Diptera: Cecidomyiidae) on Artemisia vulgaris in Europe and those attributed to an unidentified Rhopalomyia species on wild A. montana and A. princeps in Japan. The morphological features and molecular sequencing data indicate that the pest gall midge in Okinawa and the unidentified species are identical to R. foliorum, which is redescribed, with new biological information. The proportion of cultivated Artemisia plants that bore the Leaf Galls was 55.63–96.46%, a much higher proportion than on wild Artemisia. We consider that R. foliorum has shifted from non-pest to pest status in Artemisia fields under intensive cultivation that includes frequent harvesting of shoots and the application of rich nutrient fertilizer.
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detection of an invasive gall inducing pest quadrastichus erythrinae hymenoptera eulophidae causing damage to erythrina variegata l fabaceae in okinawa prefecture japan
Entomological Science, 2007Co-Authors: Nami Uechi, Takumi Uesato, Junichi YukawaAbstract:In 2005, Quadrastichus erythrinae Kim, 2004 (Hymenoptera: Eulophidae), which induces stem, petiole, and Leaf Galls on Erythrina variegata L. (Fabaceae), was found on the following six islands in Okinawa Prefecture, Japan: Okinawa, Kume, Miyako, Ishigaki, Iriomote, and Hateruma. Galls were also found in Vietnam. In Japan, no further infestation records have been reported from any of Japan's other south-western prefectures where Erythrina species grow. Because no Erythrina Galls were observed in Okinawa Prefecture before 2005, Q. erythrinae seems to have invaded quite recently.
Mara Cristina De Almeida - One of the best experts on this subject based on the ideXlab platform.
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population structure and genetic diversity analysis in gynaikothrips uzeli zimerman 1909 thysanoptera phlaeothripidae by rapd markers
Bulletin of Entomological Research, 2012Co-Authors: R O Brito, J C Silva, Roberto Ferreira Artoni, Marcelo Ricardo Vicari, Viviane Nogaroto, Rodrigo Rodrigues Matiello, Mara Cristina De AlmeidaAbstract:Thrips are small insects (0.5-3.0 mm) with distinct habits and life histories characterized by haplodiploid sex determination. In general, low levels of genetic diversity have been reported in haplodiploid insects, although most reports focus on the order Hymenoptera. Therefore, we used RAPD markers to evaluate the structure and both inter- and intra-population genetic variability of Gynaikothrips uzeli (Thysanoptera: Phlaeothripidae). Six populations, three from Parana state, southern Brazil, and three from Bahia, northeastern Brazil, were studied. Similarly to other haplodiploid insects, the genetic diversity of G. uzeli was reduced. This result is putatively related to the haplodiploid sex determination system, which yields little genetic variation, and to ecological traits of the studied species, such as the low dispersal abilities and life mode in Leaf Galls. All individuals were homogeneously clustered in their respective collection sites, forming two main groups in which populations from similar environments were more closely related. The analyzed populations were highly structured, and the genetic variation was higher among than within populations.
R O Brito - One of the best experts on this subject based on the ideXlab platform.
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population structure and genetic diversity analysis in gynaikothrips uzeli zimerman 1909 thysanoptera phlaeothripidae by rapd markers
Bulletin of Entomological Research, 2012Co-Authors: R O Brito, J C Silva, Roberto Ferreira Artoni, Marcelo Ricardo Vicari, Viviane Nogaroto, Rodrigo Rodrigues Matiello, Mara Cristina De AlmeidaAbstract:Thrips are small insects (0.5-3.0 mm) with distinct habits and life histories characterized by haplodiploid sex determination. In general, low levels of genetic diversity have been reported in haplodiploid insects, although most reports focus on the order Hymenoptera. Therefore, we used RAPD markers to evaluate the structure and both inter- and intra-population genetic variability of Gynaikothrips uzeli (Thysanoptera: Phlaeothripidae). Six populations, three from Parana state, southern Brazil, and three from Bahia, northeastern Brazil, were studied. Similarly to other haplodiploid insects, the genetic diversity of G. uzeli was reduced. This result is putatively related to the haplodiploid sex determination system, which yields little genetic variation, and to ecological traits of the studied species, such as the low dispersal abilities and life mode in Leaf Galls. All individuals were homogeneously clustered in their respective collection sites, forming two main groups in which populations from similar environments were more closely related. The analyzed populations were highly structured, and the genetic variation was higher among than within populations.
Man-miao Yang - One of the best experts on this subject based on the ideXlab platform.
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a new plagiotrochus mayr oak gall wasp species from taiwan hymenoptera cynipidae cynipini
Journal of Asia-pacific Entomology, 2016Co-Authors: Chang Ti Tang, Graham N Stone, Man-miao Yang, James A Nicholls, George MelikaAbstract:Abstract A new species of oak gall wasp, Plagiotrochus tarokoensis Tang and Melika sp. nov., is described from Taiwan. The species induces integral Leaf Galls on Quercus tarokoensis (Fagaceae). Data on the diagnosis, distribution, and biology of the new species are given. This is the second known Plagiotrochus species from the Oriental region and the first one known to associate with the Ilex group of section Cerris oaks within Quercus linnaeus subgenus Quercus.
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Is a Gall an Extended Phenotype of the Inducing Insect? A Comparative Study of Selected Morphological and Physiological Traits of Leaf and Stem Galls on Machilus thunbergii (Lauraceae) Induced by Five Species of Daphnephila (Diptera: Cecidomyiidae) i
Zoological science, 2015Co-Authors: Liang-yu Pan, Wen-neng Chen, Shau-ting Chiu, Anantanarayanan Raman, Tung-chuang Chiang, Man-miao YangAbstract:Mature Galls induced by Daphnephila truncicola, D. taiwanensis, D. sueyenae, D. stenocalia, and D. ornithocephala on Machilus thunbergii in northern Taiwan were examined to verify the dictum that the morphology of Galls is an expression of the extended phenotype of the respective gall-inducing insect. Based on their length-width ratio, the materials were grouped into either fleshy (those induced by D. taiwanensis and D. sueyenae) or slim Galls (those induced by D. truncicola, D. stenocalia, and D. ornithocephala). Stem Galls induced by D. truncicola showed an energy level of 0.0178 kJ/g. Among Leaf Galls, the greatest energy level was in the one induced by D. stenocalia (0.0193 kJ/g), followed by D. sueyenae (0.0192 kJ/g), D. taiwanensis (0.0189 kJ/g), and D. ornithocephala (0.0160 kJ/g). The numbers of reserve and nutritive cell layers in Galls were greater in the stem Galls induced by D. truncicola, similar to those in the fleshy Leaf Galls, than in the slim Leaf Galls. Based on the fungal taxa isolated from the larval chambers and considering the similarities and divergences among gall characteristics, the Galls induced by D. truncicola and D. taiwanensis clustered into one, whereas those of D. sueyenae aligned with the ‘D. stenocalia—D. ornithocephala’ cluster. The present study verified that shapes, structure, nutritive tissues, energy levels, and multiple coexisting fungal taxa within Galls reinforce that they are extended phenotypes of the respective gall-inducing Daphnephila species and they represent adaptive evolution of Daphnephila on M. thunbergii.
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first record of an andricus oak gallwasp from the oriental region a new species from taiwan hymenoptera cynipidae cynipini
Zootaxa, 2009Co-Authors: Chang Ti Tang, Man-miao Yang, George Melika, James A Nicholls, Gyorgy Csoka, Graham N StoneAbstract:A new species of oak gallwasp, Andricus formosanus is described from Taiwan which induces integral Leaf Galls on Quercus dentata (Section Quercus sensu stricto). The gall and adults of the new species most closely resembles Andricus moriokae Monzen, known from Japan. Data on the diagnosis, distribution and biology of the new species is given.
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Taxonomy and Molecular Phylogeny of Daphnephila Gall Midges (Diptera: Cecidomyiidae) Inducing Complex Leaf Galls on Lauraceae, with Descriptions of Five New Species Associated with Machilus thunbergii in Taiwan
Zoological science, 2008Co-Authors: Man-miao Yang, Junichi YukawaAbstract:Five new species of the genus Daphnephila (Diptera: Cecidomyiidae: Asphondyliini), D. ornithocephala, D. stenocalia, D. sueyenae, D. taiwanensis, and D. truncicola, all associated with Machilus thunbergii (Lauraceae), are described from Taiwan, and one previously known species, D. machilicola, is redescribed from Japan. Among the five new species, D. truncicola induces stem Galls and the other four species induce Leaf Galls. A molecular phylogenetic analysis based on partial sequences of the mitochondrial cytochrome oxidase subunit I (COI) gene suggests that in this genus the stem-galling habit is a more ancestral state compared to the Leaf-galling habit. Daphnephila seems to be of tropical origin and to have dispersed to Japan through Taiwan.
Kazuhiko Akimoto - One of the best experts on this subject based on the ideXlab platform.
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Influence of synchronization between adult emergence and host plant phenology on the population density of Pseudasphondylia neolitseae (Diptera: Cecidomyiidae) inducing Leaf Galls on Neolitsea sericea (Lauraceae)
Population Ecology, 2006Co-Authors: Junichi Yukawa, Kazuhiko AkimotoAbstract:Synchronization between the appearance of herbivorous insects and their host-plant phenology is a critical event, especially for short-lived insects such as gall midges. We studied a natural population of Pseudasphondylia neolitseae (Diptera: Cecidomyiidae) that induces Leaf Galls on Neolitsea sericea (Lauraceae) to evaluate the effect of synchronization on gall density in the subsequent generation. To do so, we combined quantitative data on host resources with time lag between emergence and host-available seasons. The gamma distribution model was applied to the emergence curve of P. neolitseae and the normal distribution model to the daily changes in the number of host buds suitable for oviposition; the latter model was transformed into an “available-resource curve” based on the mean number of host buds required for a single female to realize her eggs. By superimposing the emergence curve on the available-resource curve and calculating overlapped area, the degree of synchronization was evaluated more accurately than previous studies, which had treated only the time lag. The number of females that synchronized with host buds affected gall density in the next generation.