A New Species and a Newly Recorded Species of the Genus Paratendipes Kieffer (Diptera: Chironomidae) from China

A new species of Paratendipes Kieffer, P. angustus sp. nov., is described and the male is illustrated. P. subaequalis （Malloch, 1915） is recorded in China for the first time.

The Genus Stenochironomus Kieffer(Diptera:Chironomidae) with Three Newly Recorded Species from China

The genus Stenochironomus from China,including 10 species,is reviewed.Three species,S.koreanus Borkent,S.maculatus Borkent,and S.totifuscus Sublette are re-described and recorded from China for the first time.One species misidentification is corrected.A key to the males of Stenochironomus in China is given.

Description of a new species and a newly recorded species in the genus Eukiefferiella Thienemann,1926(Diptera:Chironomidae) from China

A new species, Eukiefferiella celata sp. nov., and a newly recorded species, E. brehmi Gouin, 1943, are described and illustrated as male imagines. A new synonym is proposed： E. togaeuquinta Sasa ＆ Okazawa, 1992, syn. nov. （= E. brehmi）.

A New Species and Two New Record Species of the Genus Stictochironomus Kieffer(Diptera:Chironomidae) from China

A new species of Stictochironomus Kieffer, S. juncaii sp. nov. from China is described and illustrated as male imago. S. multannulatus （Tokunaga） and S. pictulus （Meigen） are recorded in China for the first time. A key to the males of Stictochironomus in China is given. All specimens are deposited in the College of Life Science, Nankai University, China （BDN）.

First report of the genus Endotribelos Grodhaus, 1987 (Diptera: Chironomidae) from China, with description of a new species

Endotribelos Grodhaus, 1987 is recorded for the first time in China. The adult male of E. redimiculum sp. nov. is described and illustrated based on specimens collected from Zhejiang Province. A key to the males of this genus worldwide is given.

A new species in the genus Paracladopelma Harnisch(Diptera:Chironomidae) from China

One new species, Paracladopelma demissum sp. nov., from Sichuan Province in China, is described and illustrated.

A New Species of Subgenus Polypedilum (s. str.) Kieffer (Diptera:Chironomidae)from China

Polypedilum （Polypedilum） aequabe, sp. nov. is described as male imago from China. The species is easily distinguished from other members of the subgenus in equal length of hind tarsus II to tarsus III, the anal point with lateral setae, lateral seta of superior volsella present at subapical portion and the inferior volsella is expand apically.

ANNUAL PRODUCTION OF FIVE SPECIES OF CHIRONOMIDAE (DIPTERA)IN HOUHU LAKE,A TYPICAL ALGAL LAKE(WUHAN,CHINA)

Annual production and life cycle of five dominant species of Chironomidae (Chironomus plumosus, Cryptochironomus sp.,Tokunagayusurika akamusi, Procladius sp.,Clinotanypus sp.) were studied with samples collected monthly from April, 1996 to March, 1997 in Houhu Lake at four stations. Based on instar-frequency data,C. plumosus was univoltine, while the other four were bivoltine. Production rates in grams wet weight m?2a?1 calculated by the size-frequency method wereC. plumosus, 2.170;Cryptochironomus sp., 0.602;T. akamusi, 3.160;Procladius sp., 0.964;Clinotanypus sp., 0.390. Their P/B ratios were 3.9, 4.9, 4.4, 5.3 and 6.6, respectively.

A New Combination Cladotanytarsus gracilistylus (Chaudhuri & Datta,1992) (Ditptera:Chironomidae) from China

Tanytarsus gracilistylus （Chaudhuri ＆ Datta, 1992） is replaced to Cladotanytarsus gracilistylus as new combination. The detail re-description is given. A key to male of Cladotanytarsus from China is presented.

A New Species Group in the Genus Tanytarsus van der Wulp (Diptera:Chironomidae) Based on a Fossil Record from Baltic Amber

A new fossil chironomid, Tanytarsus serafini, found in Baltic amber is described and illustrated based on adult males. The new species and similar extant species of the genus Tanytarsus van der Wulp are compared. Due to several distinct characters of wing, legs and bypopygium, a new species group for Tanytarsus serafini is proposed, and its diagnostic features are evaluated.

LIFE CYCLE AND PRODUCTION OF CHIRONOMIDAE(DIPTERA) IN BIANDANTANG, A TYPICAL MACROPHYTIC LAKE (HUBEI, CHINA)

The life cycle and annual production of four dominant species of Chironomids ( Chironomus plumosus, Chironomus sp., Clinotanypus sp., Tokunagayusurika akamusi) were studied with samples taken monthly in Biandantang Lake at eight stations from April, 1996 to March, 1997. Instar frequency data showed C. plumosus was univoltine, while the other three were bivoltine. Production in wet weight (g/(m 2·a)) calculated by the size frequency method for each species were: C. plumosus, 2.663 ; Chironomus sp.,1.161 ;Clinotanypus sp., 0.270; T. akamusi , 1.476. Based on the mean standing stock, their P/B ratios were 3.2, 4.0, 6.2 and 4.4, respectively.

Production dynamics and life cycle of dominant chironomids (Diptera,Chironomidae) in a subtropical stream in China:adaptation to variable flow conditions in summer and autumn

The production dynamics and trophic basis of 7 dominant species of chironomids were investigated in the area of a second-order river of the Hanjiang River basin, in central China from June 2003 to June 2004. The results showed that Tvetenia discoloripes was by far the most abundant chironomid, dominating the overall standing stock of the taxa. In terms of life cycle, Chaetocladius sp., Eukiefferiella potthasti and T. discoloripes developed 1 generation a year, whereas Microtendipes sp. and Pagastia sp. developed two, while Pentaneura sp. and Polypedilum sp. developed three. T. discoloripes was the most productive chironomid with 120.305 8 g/m2.a, Pentaneura sp. and E. potthasti had relatively high production values of >17 g/m2.a, and the rest were <10 g/m2.a. All the production temporal variation tended to follow biomass patterns. T. discoloripes, Chaetocladius sp. and Pagastia sp. concentrated most of their production in winter, whereas E. potthasti, Pentaneura sp. and Polypedilum sp. had relatively higher production throughout the year. Only Microtendipes sp. had a production that peaked in summer. The overlap in temporal distribution of production among the chironomid species was generally high (>0.5), especially for filter-collectors Microtendipes sp., Chaetocladius sp., Chaetocladius sp., T. discoloripes and Pagastia sp. All species except Pentaneura sp. consumed a large portion of amorphous detritus, constituting more than 90% of their diets, and contributing nearly 90% to their secondary production. All the 7 chironomids represent obvious adaptation to local highly variable climate in summer and autumn in life cycle pattern, production dynamics, and food type.

Belgica antarctica(Diptera: Chironomidae): A natural modelorganism for extreme environments

Belgica antarctica(Diptera:Chironomidae),a brachypterous midge endemicto the maritime Antarctic,was first described in 1900.Over more than a century of study,a vast amount of information has been compiled on the species(3750000 Google searchresults as of January 10,2021),encompassing its ecology and biology,life cycle and re-production,polytene chromosomes,physiology,biochemistry and,increasingly,omics.In2014,B.antarctica’s genome was sequenced,further boosting research.Certain develop-mental stages can be cultured successfully in the laboratory.Taken together,this wealthof information allows the species to be viewed as a natural model organism for studies ofadaptation and function in extreme environments.

Why on the snow？ Winter emergence strategies of snow-active Chironomidae （Diptera） in Poland

A long-term study of adult non-biting midges （Chironomidae） active in winter on the snow in mountain areas and lowlands in Poland yielded 35 species. The lowland and mountain communities differed significantly in their specific composition. The mountain assemblage was found to be more diverse and abundant, with a substantial contribution from the subfamily Diamesinae, whereas Orthocladiinae predominated in the lowlands. Orthocladius wetterensis Brundin was the most characteristic and superdominant species in the winter-active chironomid communities in both areas. Only a few specimens and species of snow-active chironomids were recorded in late autumn and early winter. The abundance ofchironomids peaked in late February in the mountain and lowland areas with an additional peak in the mountain areas in early April. However, this second peak of activity consisted mainly of Orthocladiinae, as Diamesinae emerged earliest in the season. Most snow-active species emerged in mid- and late winter, but their seasonal patterns differed between the 2 regions as a result of the different species composition and the duration of snow cover in these regions. Spearman＇s rank correlation coefficient tests yielded positive results between each season and the number of chironomid individuals recorded in the mountain area. A positive correlation between air temperature, rising to ＋3.5 ~C, and the number of specimens recorded on the snow in the mountain community was statistically significant. The winter emergence and mate-searching strategies of chironomids are discussed in the light of global warming, and a brief compilation of most important published data on the phenomena studied is provided.

广西多足摇蚊属一新记录种记述

记述了广西多足摇蚊属一新记录种:十斑三突多足摇蚊[Polypedilum(Tripodura)decematoguttatum],并附主要特征图。十斑三突多足摇蚊隶属于多足摇蚊属(Polypedilum)三突摇蚊亚属(Tripodura),由Tokunaga于1938年命名并描述。十斑三突多足摇蚊区别于本亚属其他种的主要特征是翅具10块色斑、足具色环、肛尖每侧各具2个背突。

浙江省三江国家级城市湿地公园摇蚊科昆虫名录

在采集、调查的基础上,根据标本鉴定的结果,总结了浙江临海三江城市湿地公园摇蚊科(Chirono-midae)昆虫名录,共计3亚科22属36种。

浙江省倒毛摇蚊属一新记录种记述

记述了浙江省倒毛摇蚊属一新记录种科菲倒毛摇蚊(Microtendipes confinis)。科菲倒毛摇蚊由Meigen于1830年命名并描述。中国目前已记录倒毛摇蚊属种类10种,其中浙江省记录6种,分别为黄绿倒毛摇蚊(M.britteni)、绿小倒毛摇蚊(M.chloris)、小足倒毛摇蚊(M.pedellus)、平截倒毛摇蚊(M.truncatus)、雅安倒毛摇蚊(M.yaanensis)、浙江倒毛摇蚊(M.zhejiangensis)。科菲倒毛摇蚊与黄绿倒毛摇蚊相似,两种的主要区别在于科菲倒毛摇蚊的第Ⅸ背板后缘具4根长刚毛,而黄绿倒毛摇蚊的第Ⅸ背板后缘具13根长刚毛。并附主要特征图。

Seasonal influence and local factors affecting macroinvertebrate structure in a high-altitude Andean stream

Small water bodies are critical for maintaining freshwater biodiversity,but are among the least investigated aquatic environments.We examined physical and chemical variables at two reaches in Arroyo Tambillos,a small,high-elevation Andean stream,in NW Mendoza province,Argentina,across four seasons to examine how local factors and seasonality affected the structure of the macroinvertebrate community.The Arroyo Tambillos community was numerically dominated by ephemeropterans(mainly Massartellopsis irarrazavali)while the dipteran Chironomidae were the most species rich.Total macroinvertebrate abundance was highest in summer,driven mainly by taxa that were secondary in dominance(Austrelmis sp.and Andesiops peruvianus),while richness did not differ between seasons.However,benthic composition was different in Fall 2013(March)compared to other seasons,largely because of the increased abundance of Chironomidae.Canonical correspondence analysis discriminated Chironomidae species distributions in Fall 2013 by substrate type(i.e.,big and small boulder substrate).By contrast,discharge,velocity,and depth were the variables which most affected the macroinvertebrate abundance and distributions.Contrary to our expectations,most community changes observed occurred in fall instead of summer.Nivo-kryal stream communities like the one described here have become increasingly important for conserving mountain stream biodiversity as anthropogentic impacts and climate change increasingly impact lower stream reaches.Therefore,monitoring high-altitude streams like the Arroyo Tambillos may be critical for preventing the future loss of unique and sensitive stream biota.

天津八仙山国家级自然保护区摇蚊科昆虫名录

2018—2021年每年4—10月对八仙山摇蚊科(Chironomidae)昆虫进行调查,根据标本的鉴定结果,总结了天津市蓟州区八仙山国家级自然保护区摇蚊科昆虫名录,共计4亚科30属58种。对不同类型水体摇蚊出现情况进行统计,发现保护区内水质较为良好,保护区周边区域的水质污染受人类活动影响较大,水体在一定程度上受到污染。