In this paper,a new species of pentatomid bug Menida speciosa Zheng & Xiong,sp.nov.is described from southwestern part of Yunnan Province of China;and the Menida salvazana Distant 1921 is redescribed and f...In this paper,a new species of pentatomid bug Menida speciosa Zheng & Xiong,sp.nov.is described from southwestern part of Yunnan Province of China;and the Menida salvazana Distant 1921 is redescribed and figured based upon the type material.展开更多
Three genera, Cuspicona Dallas, Hermolaus Distant and Oncinoproctus Breddin, and six species （Cuspicona antica Vollenhoven, Hermolaus typicus Distant, Menida atkinsoni Distant, Oncinoproctus griseolus Breddin, Paterc...Three genera, Cuspicona Dallas, Hermolaus Distant and Oncinoproctus Breddin, and six species （Cuspicona antica Vollenhoven, Hermolaus typicus Distant, Menida atkinsoni Distant, Oncinoproctus griseolus Breddin, Paterculus aberrans Distant, and Rolstoniellus malacanicus （Yang）） of Pentatomidae are reported from China for the first time. Both dorsal and ventral habitus and genital illustrations of each species are provided. All specimens studied were from Institute of Entomology, Nankai University, Tianjin, China （NKUM） except Cuspicona antica Vollenhoven, 1868 whose involved species are kept at the Institute of Zoology, Chinese Academy of Sciences （IZCAS）.展开更多
Carbula humerigera （Hemiptera： Pentatomidae） is redescribed in this paper. Genitalia in both male and female, including phallus, paramere and spermatheca, are figured. Specimens used in this research are deposited ...Carbula humerigera （Hemiptera： Pentatomidae） is redescribed in this paper. Genitalia in both male and female, including phallus, paramere and spermatheca, are figured. Specimens used in this research are deposited in the Insect Museum of Henan Institute of Science and Technology, Xinxiang, Henan, China.展开更多
Insects can adapt their walking patterns to complex and varied environments and retain the ability to walk even after significant changes in their physical attributes,such as amputation.Although the interleg coordinat...Insects can adapt their walking patterns to complex and varied environments and retain the ability to walk even after significant changes in their physical attributes,such as amputation.Although the interleg coordination of intact insects has been widely described in previous studies,the adaptive walking patterns in free-walking insects with amputation of 1 or more legs are still unclear.The pentatomid bug Erthesina fullo exhibits a tripod gait,when walking freely on horizontal substrates,like many other insects.In this study,amputations were performed on this species to investigate changes in interleg coordination.The walking parameters were analyzed,such as the locations of touchdown and liftoff,cycle period,walking speed,and head displacement of intact and amputated insects.The results show that E.fullo displays adaptive interleg coordination in response to amputations.With 1 amputated leg,bugs changed to a 3-unit gait,whereas with 2 amputated legs they employed a wave gait.These data are helpful in exploring the motion mode control in walking insects and provide the theoretical basis for the gait control strategy of robots,when leg failure occurs.展开更多
The karyotypes and meiotic behaviors of three Carbula species( Carbula obtusangula Reuter, C.putoni (Jakovlev)and C. sinica Hsiao et Cheng)were studied.Karyotype analyses using specific software were m...The karyotypes and meiotic behaviors of three Carbula species( Carbula obtusangula Reuter, C.putoni (Jakovlev)and C. sinica Hsiao et Cheng)were studied.Karyotype analyses using specific software were made and model karyotype chart was presented.All three species have the typical diploid chromosome number of 14 for the family Pentatomidae and X Y sex chromosomal mechanism,but the behavior of autosomes and sex chromosomes during meiosis among three species are different,and one or two supernumerary chromosomes were detected in C.putoni. These characteristics may provide some useful clues on the study of pentatomid taxonomy and phylogeny.展开更多
Coccinellid pupae use an array of defensive strategies against their natural enemies. This study aims to assess the efficiency of gregarious pupation as a defensive mechanism against intraguild predators and cannibals...Coccinellid pupae use an array of defensive strategies against their natural enemies. This study aims to assess the efficiency of gregarious pupation as a defensive mechanism against intraguild predators and cannibals in coccinellid. The study was designed specifically （i） to determine the natural occurrence of gregarious pupation in the field for different coccinellid species, and （ii） to evaluate the adaptive value of gregarious pupation as a defensive mechanism against 2 types of predators （i.e., cannibals and intraguild predators）. In the field, gregarious pupation consisted of a group of 2-5 pupae. The proportion of gregarious pupation observed varied according to species, the highest rate being observed with Harmonia axyridis Pallas （Coccinellidae; 14.17%）. Gregarious pupation had no impact on the probability that intraguild predators and cannibals locate pupae. Intraguild predation occurred more often in site with gregarious pupation, while cannibalism occurred as often in site with gregarious pupation as in site with isolated pupa. However, for a specific pupa, the mortality rate was higher for isolated pupae than for pupae located in a gregarious pupation site both in the presence of intraguild predators and in the presence of cannibals. The spatial location of pupae within the group had no impact on mortality rate. Since it reduces the risk of predation, it is proposed that gregarious pupation act as a defensive mechanism for 11. axyridis pupae.展开更多
文摘In this paper,a new species of pentatomid bug Menida speciosa Zheng & Xiong,sp.nov.is described from southwestern part of Yunnan Province of China;and the Menida salvazana Distant 1921 is redescribed and figured based upon the type material.
基金supported by the Fundamental Research Funds for the Central Universities (65012421)the National Natural Science Foundation (30870328,J0930005)
文摘Three genera, Cuspicona Dallas, Hermolaus Distant and Oncinoproctus Breddin, and six species （Cuspicona antica Vollenhoven, Hermolaus typicus Distant, Menida atkinsoni Distant, Oncinoproctus griseolus Breddin, Paterculus aberrans Distant, and Rolstoniellus malacanicus （Yang）） of Pentatomidae are reported from China for the first time. Both dorsal and ventral habitus and genital illustrations of each species are provided. All specimens studied were from Institute of Entomology, Nankai University, Tianjin, China （NKUM） except Cuspicona antica Vollenhoven, 1868 whose involved species are kept at the Institute of Zoology, Chinese Academy of Sciences （IZCAS）.
文摘Carbula humerigera （Hemiptera： Pentatomidae） is redescribed in this paper. Genitalia in both male and female, including phallus, paramere and spermatheca, are figured. Specimens used in this research are deposited in the Insect Museum of Henan Institute of Science and Technology, Xinxiang, Henan, China.
基金supported by the National Natural Science Foundation of China under Grant 52075248,Grant 52205018the Fundamental Research Funds for the Central Universities,NO.NP2024302.
文摘Insects can adapt their walking patterns to complex and varied environments and retain the ability to walk even after significant changes in their physical attributes,such as amputation.Although the interleg coordination of intact insects has been widely described in previous studies,the adaptive walking patterns in free-walking insects with amputation of 1 or more legs are still unclear.The pentatomid bug Erthesina fullo exhibits a tripod gait,when walking freely on horizontal substrates,like many other insects.In this study,amputations were performed on this species to investigate changes in interleg coordination.The walking parameters were analyzed,such as the locations of touchdown and liftoff,cycle period,walking speed,and head displacement of intact and amputated insects.The results show that E.fullo displays adaptive interleg coordination in response to amputations.With 1 amputated leg,bugs changed to a 3-unit gait,whereas with 2 amputated legs they employed a wave gait.These data are helpful in exploring the motion mode control in walking insects and provide the theoretical basis for the gait control strategy of robots,when leg failure occurs.
文摘The karyotypes and meiotic behaviors of three Carbula species( Carbula obtusangula Reuter, C.putoni (Jakovlev)and C. sinica Hsiao et Cheng)were studied.Karyotype analyses using specific software were made and model karyotype chart was presented.All three species have the typical diploid chromosome number of 14 for the family Pentatomidae and X Y sex chromosomal mechanism,but the behavior of autosomes and sex chromosomes during meiosis among three species are different,and one or two supernumerary chromosomes were detected in C.putoni. These characteristics may provide some useful clues on the study of pentatomid taxonomy and phylogeny.
文摘Coccinellid pupae use an array of defensive strategies against their natural enemies. This study aims to assess the efficiency of gregarious pupation as a defensive mechanism against intraguild predators and cannibals in coccinellid. The study was designed specifically （i） to determine the natural occurrence of gregarious pupation in the field for different coccinellid species, and （ii） to evaluate the adaptive value of gregarious pupation as a defensive mechanism against 2 types of predators （i.e., cannibals and intraguild predators）. In the field, gregarious pupation consisted of a group of 2-5 pupae. The proportion of gregarious pupation observed varied according to species, the highest rate being observed with Harmonia axyridis Pallas （Coccinellidae; 14.17%）. Gregarious pupation had no impact on the probability that intraguild predators and cannibals locate pupae. Intraguild predation occurred more often in site with gregarious pupation, while cannibalism occurred as often in site with gregarious pupation as in site with isolated pupa. However, for a specific pupa, the mortality rate was higher for isolated pupae than for pupae located in a gregarious pupation site both in the presence of intraguild predators and in the presence of cannibals. The spatial location of pupae within the group had no impact on mortality rate. Since it reduces the risk of predation, it is proposed that gregarious pupation act as a defensive mechanism for 11. axyridis pupae.
