A peculiar sawfly genus from middle Asia,Cacosyndya Kirby,1883 and the type species Cacosyndya dimorpha(Freymuth,1870)are redescribed and illustrated.The systematic position of this genus in Tenthredinidae is discusse...A peculiar sawfly genus from middle Asia,Cacosyndya Kirby,1883 and the type species Cacosyndya dimorpha(Freymuth,1870)are redescribed and illustrated.The systematic position of this genus in Tenthredinidae is discussed.The females in the genus are apterous,the only known apterous Symphytan,but the male is normally winged.Cacosyndya is not a member of Fenusinae or Heterarthrinae,but a member of Phymatocerini of Blennocampinae,Tenthredinidae as shown by the structure of the antenna,wing venation and body structure.The relationship between Cacosyndya and members of Phymatocerini is briefly discussed.展开更多
Two species of the genus Orthonychiurus, O. himalayensis（Choudhuri, 1958） and O. folsomi（Schffer, 1900）, are redescribed from Tibet. It is the first report of these onychiurid species in Tibet.Morphological descri...Two species of the genus Orthonychiurus, O. himalayensis（Choudhuri, 1958） and O. folsomi（Schffer, 1900）, are redescribed from Tibet. It is the first report of these onychiurid species in Tibet.Morphological descriptions and illustrations of these two species are provided. A key to all known Chinese Onychiuridae species is also provided.展开更多
Thalassaphorura houtanensis sp. nov. from Shanghai, East China is described. It is similar to T. encarpata （Denis, 1931） in having labial palp of type A and the same pseudocelli formula on the body. It can be distin...Thalassaphorura houtanensis sp. nov. from Shanghai, East China is described. It is similar to T. encarpata （Denis, 1931） in having labial palp of type A and the same pseudocelli formula on the body. It can be distinguished by the shape of unguis, chaetotaxy of labium, maxillary out lobe and ventral tube. It was confirmed as an absolutely parthenogenetic species after a reproduction test in the lab. In addition, the DNA barcoding sequences of this new species were sequenced and analyzed. The intraspecific genetic divergence is 0.18% on average and ranges from zero to 0.46%.展开更多
基金supported by the National Natural Science Foundation of China(3237050031172142)。
文摘A peculiar sawfly genus from middle Asia,Cacosyndya Kirby,1883 and the type species Cacosyndya dimorpha(Freymuth,1870)are redescribed and illustrated.The systematic position of this genus in Tenthredinidae is discussed.The females in the genus are apterous,the only known apterous Symphytan,but the male is normally winged.Cacosyndya is not a member of Fenusinae or Heterarthrinae,but a member of Phymatocerini of Blennocampinae,Tenthredinidae as shown by the structure of the antenna,wing venation and body structure.The relationship between Cacosyndya and members of Phymatocerini is briefly discussed.
基金supported by the National Natural Science Foundation of China(31301862,31370532)the Fund for Excellent Young Scholars of Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences(DLSYQ13003)
文摘Two species of the genus Orthonychiurus, O. himalayensis（Choudhuri, 1958） and O. folsomi（Schffer, 1900）, are redescribed from Tibet. It is the first report of these onychiurid species in Tibet.Morphological descriptions and illustrations of these two species are provided. A key to all known Chinese Onychiuridae species is also provided.
基金supported by the National Natural Science Foundation of China (31301873)
文摘Thalassaphorura houtanensis sp. nov. from Shanghai, East China is described. It is similar to T. encarpata （Denis, 1931） in having labial palp of type A and the same pseudocelli formula on the body. It can be distinguished by the shape of unguis, chaetotaxy of labium, maxillary out lobe and ventral tube. It was confirmed as an absolutely parthenogenetic species after a reproduction test in the lab. In addition, the DNA barcoding sequences of this new species were sequenced and analyzed. The intraspecific genetic divergence is 0.18% on average and ranges from zero to 0.46%.
