A new species of the genus Amphinemura Ris from Xinjiang, China is described in this paper： A. tricintusidens Wang ＆ Zhu, sp. nov. The types are deposited in the Insect Collection of Yangzhou University.
A new species of the genus Tyloperla from China, Tyloperla bihypodroma, sp. nov., is described. The new species is similar to Tyloperla attenuate, but posterior margin of the new species raised as a ridge, a concavity...A new species of the genus Tyloperla from China, Tyloperla bihypodroma, sp. nov., is described. The new species is similar to Tyloperla attenuate, but posterior margin of the new species raised as a ridge, a concavity presented at the middle of the ridge, while in the latter, tergum 8 with center area raised, and sensilla basiconica more than the former; tergum 9 of the new species depressed mesally, margin of the concavity sclerotized distinctly, with thin disky sensilla basiconica, while in the latter, a cluster of sensilla basieonica in the middle of tergum 9 distinctly. The type of the new species is deposited in the Insect Collection of Yangzhou University.展开更多
Three new genera and species Archaeoperla rarissimus gen. et sp. nov. （Perlidae）, Liaotaenionema tenuitibia gen. et sp. nov. （Taeniopterygidae） and Parvinemoura parvus gen. et sp. nov. （？Nemouridae） are describ...Three new genera and species Archaeoperla rarissimus gen. et sp. nov. （Perlidae）, Liaotaenionema tenuitibia gen. et sp. nov. （Taeniopterygidae） and Parvinemoura parvus gen. et sp. nov. （？Nemouridae） are described and illustrated. All of them were collected from Yixian Formation of the western Liaoning, China. Hitherto, A. rarissimus is the oldest species possessing typical characters of Perlidae; the finding of L. tenuitibia indicates taeniopterygids once lived in the northeastern China in the late Mesozoic, but frequent volcanic activities, climate changes, or other environmental changes might have resulted in the disappearance of Taeniopterygidae in northern China after Mesozoic. Ancestral groups of Nemouridae have been abundant from Middle Jurassic, and male genitalia of P. parvus gen. et sp. nov. has been developed and similar to extant Nemouridae in the late Mesozoic. The stonefly fossils found from Yixian Formation are not divers at the species level, but rich at the family level. The diversity of stonefly implies different microclimate existed in the northeastern China at that time. A large old lacustrine basin existed in the western Liaoning, surrounded by hygrophilous plants on swampland and lake shore, warm and humid; tall arbor and boscage on the hillside nearby, mild and dry; mountains in the distance, rivulets running among the mountains, cool and wet. Many insects, prefer cool climate （e.g. stonefly, raphidiopterans, et ai.）, lived in the mountains with rivulets.展开更多
A new species of the genus Kamimuria Klapalek, Kamimuria grandispinata, （Plecoptera, Perlidae） from Guizhou, China is described and illustrated in this paper.
One new species in the genus ChinoperIa from China is described： Chinoperla mengmanensis sp. nov. Types of the new species are deposited in the Insect Collection of Yangzhou University.
A rich fauna of Ephemeroptera(mayfly),Plecoptera(stonefly) and Trichoptera(caddisfly)(EPT) were collected from 14 highland streams discharging into the Temenggor Reservoir in Perak in the northern peninsular Malaysia....A rich fauna of Ephemeroptera(mayfly),Plecoptera(stonefly) and Trichoptera(caddisfly)(EPT) were collected from 14 highland streams discharging into the Temenggor Reservoir in Perak in the northern peninsular Malaysia.Out of the 3 orders,Ephemeroptera was the most diverse but Trichoptera was the most abundant.45 genera that belonged to 25 families of EPT were recorded.Distribution of EPT varied significantly between orders and types of streams they inhabited.Their diversity and abundance were higher in the second and third order streams.There was no significant relationship between environmental parameters and diversity as well as abundance of EPT in these streams.Their diversity indices together with EPT taxa richness scores referred to clean water environment,hence very suitable for these insects.The EPT taxa richness calculated for the 14 streams reflected that 13 out of 14 streams were undisturbed having good water quality(value of EPT taxa richness > 10).Previous logging and mining activities were suspected to be the main cause for tremendous disappearance of EPT genera in the Kelian stream.Since no previous human activities were recorded around the Telang stream,natural phenomena possibly contributed to low abundance of these insects in the Telang stream.展开更多
Three new species from Tibet are described: Amphinemura yangi, A. l ii and A. tibetensis. Their relationships with the relative species are di scus sed. A key to the species of the genus Amphinemura from Tibet is pres...Three new species from Tibet are described: Amphinemura yangi, A. l ii and A. tibetensis. Their relationships with the relative species are di scus sed. A key to the species of the genus Amphinemura from Tibet is presented. The types are deposited in the Insect Collection of China Agricultural Universit y.展开更多
This study examines the rate of female answers to conspecific versus heterospecific male vibratory calls in three,closely related stonefly species:Zwicknia bifrons,Z.acuta,and Z.rupprechti.In a previous study those th...This study examines the rate of female answers to conspecific versus heterospecific male vibratory calls in three,closely related stonefly species:Zwicknia bifrons,Z.acuta,and Z.rupprechti.In a previous study those three species were recognized on the basis of their distinct male drumming calls along with differences in genital morphology and genetic divergence.During this study no-choice playback experiments using original male call samples from each species were performed,and the answer rate of females to con・specific and heterospecific signal variants was measured.Mixed effect logistic regression models were used to test if male call species identity had a statistically significant effect on female answer probability.Females answered conspecific male calls with significantly higher probability than heterospecific calls in all the three examined species,suggesting that the divergence of vibrational communication can be an important component of the prezygotic isolation between them.Low,but well detectable responsiveness to heterospecific calls was observable between Z.bifrons and Z.acuta,the two species closest to each other regarding mitochondrial genetic divergence and male call pattern similarity.Thus,our results are most congruent with a tight,gradual coevolution of male calls and female preferences.展开更多
Temperature is a key factor that shapes the distribution of organisms.Having knowledge about how species respond to temperature is relevant to devise strategies for addressing the impacts of climate change.Aquatic ins...Temperature is a key factor that shapes the distribution of organisms.Having knowledge about how species respond to temperature is relevant to devise strategies for addressing the impacts of climate change.Aquatic insects are particularly vulnerable to climate change,yet there is still much to learn about their ecology and distribution.In the Yungas ecoregion of Northwestern Argentina,cold-and warm-adapted species of the orders Ephemeroptera,Plecoptera,and Trichoptera(EPT)are segregated by elevation.We modeled the ecological niche of South American EPT species in this region using available data and projected their potential distribution in geographic space.Species were grouped based on their ecogeographic similarity,and we analyzed their replacement pattern along elevation gradients,focusing on the ecotone where opposing thermal preferences converge.Along this interface,we identified critical points where the combined incidence of cold and warm assemblages maximizes,indicating a significant transition zone.We found that the Montane Cloud Forest holds the interface,with a particularly greater suitability at its lower boundary.The main axis of the interface runs in a N-S direction and falls between 14°C-16°C mean annual isotherms.The probability of a particular location within a basin being classified as part of the interface increases as Kira’s warmth index approaches a score around 150.Understanding the interface is critical for defining the thermal limits of species distribution and designing biomonitoring programs.Changes in the location of thermal constants related to mountainous ecotones may cause vertical displacement of aquatic insects and vegetation communities.We have recognized significant temperature thresholds that serve as indicators of suitability for the interface.As global warming is anticipated to shift these indicators,we suggest using them to monitor the imprints of climate change on mountain ecosystems.展开更多
基金the National Natural Science Foundation of China (30470207)
文摘A new species of the genus Amphinemura Ris from Xinjiang, China is described in this paper： A. tricintusidens Wang ＆ Zhu, sp. nov. The types are deposited in the Insect Collection of Yangzhou University.
基金This research was supported by the National Natural Science Foundation of China (30070098)the Ministry of Science and Technology of China (2006FY120100)
文摘A new species of the genus Tyloperla from China, Tyloperla bihypodroma, sp. nov., is described. The new species is similar to Tyloperla attenuate, but posterior margin of the new species raised as a ridge, a concavity presented at the middle of the ridge, while in the latter, tergum 8 with center area raised, and sensilla basiconica more than the former; tergum 9 of the new species depressed mesally, margin of the concavity sclerotized distinctly, with thin disky sensilla basiconica, while in the latter, a cluster of sensilla basieonica in the middle of tergum 9 distinctly. The type of the new species is deposited in the Insect Collection of Yangzhou University.
文摘Three new genera and species Archaeoperla rarissimus gen. et sp. nov. （Perlidae）, Liaotaenionema tenuitibia gen. et sp. nov. （Taeniopterygidae） and Parvinemoura parvus gen. et sp. nov. （？Nemouridae） are described and illustrated. All of them were collected from Yixian Formation of the western Liaoning, China. Hitherto, A. rarissimus is the oldest species possessing typical characters of Perlidae; the finding of L. tenuitibia indicates taeniopterygids once lived in the northeastern China in the late Mesozoic, but frequent volcanic activities, climate changes, or other environmental changes might have resulted in the disappearance of Taeniopterygidae in northern China after Mesozoic. Ancestral groups of Nemouridae have been abundant from Middle Jurassic, and male genitalia of P. parvus gen. et sp. nov. has been developed and similar to extant Nemouridae in the late Mesozoic. The stonefly fossils found from Yixian Formation are not divers at the species level, but rich at the family level. The diversity of stonefly implies different microclimate existed in the northeastern China at that time. A large old lacustrine basin existed in the western Liaoning, surrounded by hygrophilous plants on swampland and lake shore, warm and humid; tall arbor and boscage on the hillside nearby, mild and dry; mountains in the distance, rivulets running among the mountains, cool and wet. Many insects, prefer cool climate （e.g. stonefly, raphidiopterans, et ai.）, lived in the mountains with rivulets.
基金supported by the National Natural Science Foundation of China (31071958)the Ministry of Science and Technology of China (2006FY120100)
文摘A new species of the genus Kamimuria Klapalek, Kamimuria grandispinata, （Plecoptera, Perlidae） from Guizhou, China is described and illustrated in this paper.
基金supported by the National Natural Science Foundation of China (31071958)
文摘One new species in the genus ChinoperIa from China is described： Chinoperla mengmanensis sp. nov. Types of the new species are deposited in the Insect Collection of Yangzhou University.
文摘A rich fauna of Ephemeroptera(mayfly),Plecoptera(stonefly) and Trichoptera(caddisfly)(EPT) were collected from 14 highland streams discharging into the Temenggor Reservoir in Perak in the northern peninsular Malaysia.Out of the 3 orders,Ephemeroptera was the most diverse but Trichoptera was the most abundant.45 genera that belonged to 25 families of EPT were recorded.Distribution of EPT varied significantly between orders and types of streams they inhabited.Their diversity and abundance were higher in the second and third order streams.There was no significant relationship between environmental parameters and diversity as well as abundance of EPT in these streams.Their diversity indices together with EPT taxa richness scores referred to clean water environment,hence very suitable for these insects.The EPT taxa richness calculated for the 14 streams reflected that 13 out of 14 streams were undisturbed having good water quality(value of EPT taxa richness > 10).Previous logging and mining activities were suspected to be the main cause for tremendous disappearance of EPT genera in the Kelian stream.Since no previous human activities were recorded around the Telang stream,natural phenomena possibly contributed to low abundance of these insects in the Telang stream.
文摘Three new species from Tibet are described: Amphinemura yangi, A. l ii and A. tibetensis. Their relationships with the relative species are di scus sed. A key to the species of the genus Amphinemura from Tibet is presented. The types are deposited in the Insect Collection of China Agricultural Universit y.
基金a grant from the Hungarian National Research Fund(OTKA/NKFI K81929).
文摘This study examines the rate of female answers to conspecific versus heterospecific male vibratory calls in three,closely related stonefly species:Zwicknia bifrons,Z.acuta,and Z.rupprechti.In a previous study those three species were recognized on the basis of their distinct male drumming calls along with differences in genital morphology and genetic divergence.During this study no-choice playback experiments using original male call samples from each species were performed,and the answer rate of females to con・specific and heterospecific signal variants was measured.Mixed effect logistic regression models were used to test if male call species identity had a statistically significant effect on female answer probability.Females answered conspecific male calls with significantly higher probability than heterospecific calls in all the three examined species,suggesting that the divergence of vibrational communication can be an important component of the prezygotic isolation between them.Low,but well detectable responsiveness to heterospecific calls was observable between Z.bifrons and Z.acuta,the two species closest to each other regarding mitochondrial genetic divergence and male call pattern similarity.Thus,our results are most congruent with a tight,gradual coevolution of male calls and female preferences.
文摘Temperature is a key factor that shapes the distribution of organisms.Having knowledge about how species respond to temperature is relevant to devise strategies for addressing the impacts of climate change.Aquatic insects are particularly vulnerable to climate change,yet there is still much to learn about their ecology and distribution.In the Yungas ecoregion of Northwestern Argentina,cold-and warm-adapted species of the orders Ephemeroptera,Plecoptera,and Trichoptera(EPT)are segregated by elevation.We modeled the ecological niche of South American EPT species in this region using available data and projected their potential distribution in geographic space.Species were grouped based on their ecogeographic similarity,and we analyzed their replacement pattern along elevation gradients,focusing on the ecotone where opposing thermal preferences converge.Along this interface,we identified critical points where the combined incidence of cold and warm assemblages maximizes,indicating a significant transition zone.We found that the Montane Cloud Forest holds the interface,with a particularly greater suitability at its lower boundary.The main axis of the interface runs in a N-S direction and falls between 14°C-16°C mean annual isotherms.The probability of a particular location within a basin being classified as part of the interface increases as Kira’s warmth index approaches a score around 150.Understanding the interface is critical for defining the thermal limits of species distribution and designing biomonitoring programs.Changes in the location of thermal constants related to mountainous ecotones may cause vertical displacement of aquatic insects and vegetation communities.We have recognized significant temperature thresholds that serve as indicators of suitability for the interface.As global warming is anticipated to shift these indicators,we suggest using them to monitor the imprints of climate change on mountain ecosystems.
