Parthenogenesis, reproduction without fertilization, is not common in the Chironomidae (Diptera), a family of insects with more than 6,000 described species. Nonetheless, parthenogenetic species and strains have been documented in at least three subfamilies (the Chironominae, Orthocladiinae, and Telmatogoninae), spanning 17 genera and ~30 species. One such species, Paratanytarsus laccophilus Edwards 1929, is known to be parthenogenetic in a small portion of its range in Finland, with most other European populations of this species showing evidence of sexual reproduction. We present evidence of parthenogenetic populations from the Paratanytarsus laccophilus species group in the Nearctic, specifically a High Arctic site near Utqiaġvik (formerly Barrow), Alaska. During May-July of 2015 and 2016, we sampled emerging adult chironomids and pupal exuviae daily to document insect emergence phenologies. Across 15 local populations, all 623 pupal exuviae collected from the P. laccophilus species group were female. Larvae reared from two populations under controlled temperature treatments emerged as female adults (N=37). When isolated, these reared female adults oviposited, and eggs hatched successfully. These progeny were reared for another 12-13 days, reaching second instar larvae when they were preserved at the end of our field season. Taken together, this evidence strongly indicates parthenogenesis from the P. laccophilus species group at this location. This species was not previously documented at Utqiaġvik. Although parthenogenetic, their emergence at this location was highly synchronized. In the harsh environment of arctic Alaska, the fitness rewards of parthenogenesis are likely great. Indeed, chironomid parthenogenesis in the northern hemisphere is most commonly documented from far-northern extremes and in extreme habitats.
{"title":"Evidence of parthenogenetic populations from the Paratanytarsus laccophilus species group (Diptera: Chironomidae) in the Alaskan Arctic","authors":"A. Lackmann, D. C. McEwen, M. Butler","doi":"10.5324/CJCR.V0I33.3478","DOIUrl":"https://doi.org/10.5324/CJCR.V0I33.3478","url":null,"abstract":"Parthenogenesis, reproduction without fertilization, is not common in the Chironomidae (Diptera), a family of insects with more than 6,000 described species. Nonetheless, parthenogenetic species and strains have been documented in at least three subfamilies (the Chironominae, Orthocladiinae, and Telmatogoninae), spanning 17 genera and ~30 species. One such species, Paratanytarsus laccophilus Edwards 1929, is known to be parthenogenetic in a small portion of its range in Finland, with most other European populations of this species showing evidence of sexual reproduction. We present evidence of parthenogenetic populations from the Paratanytarsus laccophilus species group in the Nearctic, specifically a High Arctic site near Utqiaġvik (formerly Barrow), Alaska. During May-July of 2015 and 2016, we sampled emerging adult chironomids and pupal exuviae daily to document insect emergence phenologies. Across 15 local populations, all 623 pupal exuviae collected from the P. laccophilus species group were female. Larvae reared from two populations under controlled temperature treatments emerged as female adults (N=37). When isolated, these reared female adults oviposited, and eggs hatched successfully. These progeny were reared for another 12-13 days, reaching second instar larvae when they were preserved at the end of our field season. Taken together, this evidence strongly indicates parthenogenesis from the P. laccophilus species group at this location. This species was not previously documented at Utqiaġvik. Although parthenogenetic, their emergence at this location was highly synchronized. In the harsh environment of arctic Alaska, the fitness rewards of parthenogenesis are likely great. Indeed, chironomid parthenogenesis in the northern hemisphere is most commonly documented from far-northern extremes and in extreme habitats.","PeriodicalId":30852,"journal":{"name":"CHIRONOMUS Journal of Chironomidae Research","volume":"1 1","pages":"48-58"},"PeriodicalIF":0.0,"publicationDate":"2020-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44969123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nubensia nubens (Edwards 1929) is reported for the first time in Bulgaria from two lowland rivers, tributaries of the Danube (eastern Europe). Larvae of the species were found incidentally in samples collected for an ichthyological study, in the gut contents of Neogobius melanostomus (Pallas 1814) (Actinopterygii: Gobiidae), and in a benthic sample. The habitat conditions at the corresponding sites differed from those of previous records. Our finding underlines the potential of non-standard supporting methods, such as analyzing fish gut contents for discovering rare species that are hard to record by standard hydrobiological methods.
{"title":"First record of Nubensia nubens (Edwards, 1929) (Diptera: Chironomidae) for Bulgaria","authors":"Dimitriy Dashinov, L. Hamerlík","doi":"10.5324/CJCR.V0I33.3438","DOIUrl":"https://doi.org/10.5324/CJCR.V0I33.3438","url":null,"abstract":"Nubensia nubens (Edwards 1929) is reported for the first time in Bulgaria from two lowland rivers, tributaries of the Danube (eastern Europe). Larvae of the species were found incidentally in samples collected for an ichthyological study, in the gut contents of Neogobius melanostomus (Pallas 1814) (Actinopterygii: Gobiidae), and in a benthic sample. The habitat conditions at the corresponding sites differed from those of previous records. Our finding underlines the potential of non-standard supporting methods, such as analyzing fish gut contents for discovering rare species that are hard to record by standard hydrobiological methods.","PeriodicalId":30852,"journal":{"name":"CHIRONOMUS Journal of Chironomidae Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49518910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The mature and immature stages of Clunio ponticus Michailova, 1980 are diagnosed and described based on associated material recently collected in the marine littoral zone of Varna, St-Konstantin and Helena Resorts, Black Sea (eastern Bulgaria). Male and female adults, pupae and larvae of C. ponticus can be easily distinguished from other known European Clunio species on the basis of some atypical features found in the male and female adults, pupal exuviae and fourth instar larvae. In addition, the biological cycle (reproduction and emergence) of C. ponticus is not synchronized with lunar periodicity (new and full moon) as for some other known Clunio species from Europe, but closely related to the typology of the intertidal zone along the coastline of the Black Sea. This indicates that this species is a local biogeographic representative of the ‘Pontus Region’, which includes the eastern coastline of the Black Sea. Remarks on related known Clunio species from Europe with comments on the ecology and geographical distribution of C. ponticus are given.
{"title":"Description of the adult and immature stages of Clunio ponticus Michailova, 1980 (Diptera, Chironomidae), from the Black Sea, Varna, Bulgaria","authors":"J. Moubayed-Breil, P. Michailova, P. Langton","doi":"10.5324/cjcr.v0i33.3332","DOIUrl":"https://doi.org/10.5324/cjcr.v0i33.3332","url":null,"abstract":"The mature and immature stages of Clunio ponticus Michailova, 1980 are diagnosed and described based on associated material recently collected in the marine littoral zone of Varna, St-Konstantin and Helena Resorts, Black Sea (eastern Bulgaria). Male and female adults, pupae and larvae of C. ponticus can be easily distinguished from other known European Clunio species on the basis of some atypical features found in the male and female adults, pupal exuviae and fourth instar larvae. In addition, the biological cycle (reproduction and emergence) of C. ponticus is not synchronized with lunar periodicity (new and full moon) as for some other known Clunio species from Europe, but closely related to the typology of the intertidal zone along the coastline of the Black Sea. This indicates that this species is a local biogeographic representative of the ‘Pontus Region’, which includes the eastern coastline of the Black Sea. Remarks on related known Clunio species from Europe with comments on the ecology and geographical distribution of C. ponticus are given.","PeriodicalId":30852,"journal":{"name":"CHIRONOMUS Journal of Chironomidae Research","volume":"1 1","pages":"31-47"},"PeriodicalIF":0.0,"publicationDate":"2020-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45376104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The larva of two very similar Cricotopus species are described for the first time: Cricotopus diversus (Nearctic) and C. festivellus, new description (West Palaearctic). Confusion can arise depending on the source used for identification of Nearctic Cricotopus. The key of LeSage and Harrison (1980) treated adults and exuviae of C. diversus as variants of C. festivellus. Subsequently Boesel (1983) formally described C. diversus and included it in keys to adult Cricotopus of the eastern United States. Adults of these species have been distinguished by consistent differences in the pigmentation on the fourth and fifth abdominal tergites; we also confirmed differences in the structure of the male hypopygium. Keys to larvae, pupal exuviae and adult males are presented. Publicly available DNA barcode records document C. diversus populations in the Mid-Atlantic US and Ontario, Canada, whereas barcode records of C. festivellus were available only for Scandinavia, although this species is widely distributed in Western Europe. These two species are genetically distinct, with 13% mean difference in barcode sequence between species. Both species are reported from rivers and lakes of relatively good water quality.
本文首次报道了两种非常相似的Cricotopus diversus (Nearctic)和C. festivellus, new description (West palenorth)的幼虫。根据用于鉴定新北极Cricotopus的来源，可能会产生混淆。LeSage和Harrison(1980)将C. diversus的成虫和蜕皮虫视为C. festivellus的变种。随后Boesel(1983)正式描述了C. diversus，并将其纳入美国东部成年Cricotopus的关键。这些物种的成虫在第4和第5腹肌上的色素沉着一致差异;我们也证实了男性性功能减退在结构上的差异。给出了幼虫、蛹蜕皮和成年雄虫的钥匙。公开的DNA条形码记录记录了C. diversus在美国大西洋中部和加拿大安大略省的种群，而C. festivellus的条形码记录仅在斯堪的纳维亚地区可用，尽管该物种广泛分布于西欧。这两个物种在遗传上是不同的，物种之间的条形码序列平均差异为13%。据报道，这两种物种都来自水质相对较好的河流和湖泊。
{"title":"Description of the larvae of Cricotopus festivellus (Kieffer 1906) and Cricotopus diversus (Boesel 1983) with keys to discrimination of larval, pupal and adult stages (Diptera: Chironomidae)","authors":"H.P.J.J. Cuppen, S. Gresens, D. Tempelman","doi":"10.5324/cjcr.v0i33.2985","DOIUrl":"https://doi.org/10.5324/cjcr.v0i33.2985","url":null,"abstract":"The larva of two very similar Cricotopus species are described for the first time: Cricotopus diversus (Nearctic) and C. festivellus, new description (West Palaearctic). Confusion can arise depending on the source used for identification of Nearctic Cricotopus. The key of LeSage and Harrison (1980) treated adults and exuviae of C. diversus as variants of C. festivellus. Subsequently Boesel (1983) formally described C. diversus and included it in keys to adult Cricotopus of the eastern United States. Adults of these species have been distinguished by consistent differences in the pigmentation on the fourth and fifth abdominal tergites; we also confirmed differences in the structure of the male hypopygium. Keys to larvae, pupal exuviae and adult males are presented. Publicly available DNA barcode records document C. diversus populations in the Mid-Atlantic US and Ontario, Canada, whereas barcode records of C. festivellus were available only for Scandinavia, although this species is widely distributed in Western Europe. These two species are genetically distinct, with 13% mean difference in barcode sequence between species. Both species are reported from rivers and lakes of relatively good water quality.","PeriodicalId":30852,"journal":{"name":"CHIRONOMUS Journal of Chironomidae Research","volume":"1 1","pages":"4-16"},"PeriodicalIF":0.0,"publicationDate":"2020-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46446605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A new genus and two species of the subfamily Orthocladiinae are described from western North America. Oropuella gen. n. shows affinities to Parametriocnemus Goetghebuer and Paraphaenocladius Thienemann, but can be distinguished by morphology for all life stages. Two novel species are placed in the new genus, Oropuella eidolon sp. n and Oropuella pallida sp. n. Amendments to current genus keys are given to incorporate the new genus, and the current state of Orthocladiinae species taxonomy in the western Nearctic is discussed.
{"title":"Oropuella, a new genus of Orthocladiinae from the western Nearctic","authors":"A. Fasbender","doi":"10.5324/cjcr.v0i33.3068","DOIUrl":"https://doi.org/10.5324/cjcr.v0i33.3068","url":null,"abstract":"A new genus and two species of the subfamily Orthocladiinae are described from western North America. Oropuella gen. n. shows affinities to Parametriocnemus Goetghebuer and Paraphaenocladius Thienemann, but can be distinguished by morphology for all life stages. Two novel species are placed in the new genus, Oropuella eidolon sp. n and Oropuella pallida sp. n. Amendments to current genus keys are given to incorporate the new genus, and the current state of Orthocladiinae species taxonomy in the western Nearctic is discussed.","PeriodicalId":30852,"journal":{"name":"CHIRONOMUS Journal of Chironomidae Research","volume":"1 1","pages":"17-30"},"PeriodicalIF":0.0,"publicationDate":"2020-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41514675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The pupa of Tanytarsus alatus Paggi (1992) is described and figured for the first time. Notes for comparison with other species of the genus are provided, as well as brief notes on its geographic distribution.
{"title":"Description of the pupa of Tanytarsus alatus Paggi (1992) (Chironominae: Tanytarsini)","authors":"M. Donato, Juan Pablo Zanotto Arpellino, A. Siri","doi":"10.5324/cjcr.v0i33.3350","DOIUrl":"https://doi.org/10.5324/cjcr.v0i33.3350","url":null,"abstract":"The pupa of Tanytarsus alatus Paggi (1992) is described and figured for the first time. Notes for comparison with other species of the genus are provided, as well as brief notes on its geographic distribution.","PeriodicalId":30852,"journal":{"name":"CHIRONOMUS Journal of Chironomidae Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44502625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Non-biting midges are extraordinarily well-suited as environmental indicators in freshwater biomonitoring; numerous studies by those in our community support this claim. Nevertheless, our favorite organisms are excluded from many national monitoring programs due to their complex taxonomy, insufficiently described immatures, and resource demanding identification. For example, only a handful of European countries regularly use chironomid species in classification of water body ecological status for the EU Water Framework Directive (Weigand et al. 2019, supplement 2).
非叮蚊特别适合作为淡水生物监测的环境指标;我们社区的许多研究都支持这一说法。然而，我们最喜欢的生物被排除在许多国家监测计划之外，因为它们的分类复杂，描述不充分，不成熟，需要资源识别。例如，只有少数欧洲国家在欧盟水框架指令的水体生态状况分类中定期使用摇尾拟虫物种(Weigand et al. 2019，补编2)。
{"title":"A new dawn for chironomids in freshwater biomonitoring?","authors":"T. Ekrem","doi":"10.5324/CJCR.V0I32.3367","DOIUrl":"https://doi.org/10.5324/CJCR.V0I32.3367","url":null,"abstract":"Non-biting midges are extraordinarily well-suited as environmental indicators in freshwater biomonitoring; numerous studies by those in our community support this claim. Nevertheless, our favorite organisms are excluded from many national monitoring programs due to their complex taxonomy, insufficiently described immatures, and resource demanding identification. For example, only a handful of European countries regularly use chironomid species in classification of water body ecological status for the EU Water Framework Directive (Weigand et al. 2019, supplement 2).","PeriodicalId":30852,"journal":{"name":"CHIRONOMUS Journal of Chironomidae Research","volume":"1 1","pages":"2-3"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43206797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The 21st International Symposium on Chironomidae was originally scheduled for Tsukuba, Japan in July 2021. However, the COVID-19 pandemic is far from ending and Tokyo Summer Olympic Games were postponed to 2021. Many international conferences including the International Congress of Entomology or the Congress of the International Society of Limnology were also reported to next year. The organizing committee wishes to welcome the whole community of chironomid researchers to Tsukuba under safer and the best possible conditions. For this reason, the organizing committee decided to postpone the symposium to summer 2022. As many colleagues agreed, a physical meeting will yield more fruitful exchanges in our field rather than an online symposium. This is also one point that motivated our decision to postpone the 21st International Symposium on Chironomidae to 2022. As soon as the new dates for the Symposium are fixed, we will make a new announcements in the Chironomus Journal, on the Chironomid Home Page and in the Chironomidae list server (chironomidae@vm.ntnu.no). We wish you all good health and look forward to welcome all of you in Tsukuba!
{"title":"The 21st International Symposium on Chironomidae","authors":"R. Cornette","doi":"10.5324/CJCR.V0I32.3352","DOIUrl":"https://doi.org/10.5324/CJCR.V0I32.3352","url":null,"abstract":"The 21st International Symposium on Chironomidae was originally scheduled for Tsukuba, Japan in July 2021. However, the COVID-19 pandemic is far from ending and Tokyo Summer Olympic Games were postponed to 2021. Many international conferences including the International Congress of Entomology or the Congress of the International Society of Limnology were also reported to next year. The organizing committee wishes to welcome the whole community of chironomid researchers to Tsukuba under safer and the best possible conditions. For this reason, the organizing committee decided to postpone the symposium to summer 2022. As many colleagues agreed, a physical meeting will yield more fruitful exchanges in our field rather than an online symposium. This is also one point that motivated our decision to postpone the 21st International Symposium on Chironomidae to 2022. As soon as the new dates for the Symposium are fixed, we will make a new announcements in the Chironomus Journal, on the Chironomid Home Page and in the Chironomidae list server (chironomidae@vm.ntnu.no).\u0000We wish you all good health and look forward to welcome all of you in Tsukuba!","PeriodicalId":30852,"journal":{"name":"CHIRONOMUS Journal of Chironomidae Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46714971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Hamerlík, M. Veselská, Milan Novikmec, Marek Svitok
Here we report the first record of Lasiodimesa (Podonominae) in Slovakia. A single larva was collected in a small and shallow alpine pond located at 1,654 m a.s.l. in the High Tatra Mountains. Acidotolerant taxa such as Psectrocladius octomaculatus, Zalutschia tatrica, Synendotendipes sp. and Tanytarsus cf. gregarious were present in the community of the pond. Our finding indicates that the typical habitat of Lasiodiamesa larva is not necessarily a bog, but can also be a small acidic waterbody.
{"title":"Lasiodiamesa (Podonominae, Chironomidae), first record of the genus from Slovakia","authors":"L. Hamerlík, M. Veselská, Milan Novikmec, Marek Svitok","doi":"10.5324/CJCR.V0I32.3361","DOIUrl":"https://doi.org/10.5324/CJCR.V0I32.3361","url":null,"abstract":"Here we report the first record of Lasiodimesa (Podonominae) in Slovakia. A single larva was collected in a small and shallow alpine pond located at 1,654 m a.s.l. in the High Tatra Mountains. Acidotolerant taxa such as Psectrocladius octomaculatus, Zalutschia tatrica, Synendotendipes sp. and Tanytarsus cf. gregarious were present in the community of the pond. Our finding indicates that the typical habitat of Lasiodiamesa larva is not necessarily a bog, but can also be a small acidic waterbody.","PeriodicalId":30852,"journal":{"name":"CHIRONOMUS Journal of Chironomidae Research","volume":"1 1","pages":"79-82"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44640721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The 3rd Chinese Symposium on Chironomidae","authors":"Chao Song, X. Qi, Xinhua H. Wang","doi":"10.5324/cjcr.v0i32.3345","DOIUrl":"https://doi.org/10.5324/cjcr.v0i32.3345","url":null,"abstract":"","PeriodicalId":30852,"journal":{"name":"CHIRONOMUS Journal of Chironomidae Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46930050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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