CHIRONOMUS Journal of Chironomidae Research <p>The CHIRONOMUS Journal of Chironomidae Research is devoted to publishing peer-reviewed research articles related to all aspects of chironomid research. The journal also serves as an updated news bulletin for the Chironomidae research community. The journal has one issue per year, but articles are published online continuously after they are accepted. The journal is open access, and can be downloaded freely from this website. All research articles submitted to CHIRONOMUS<em>&nbsp;Current Reseach</em>&nbsp;section are subject to peer-review. There are no page charges for manuscripts accepted for publication.</p> Norwegian University of Science and Technology en-US CHIRONOMUS Journal of Chironomidae Research 0172-1941 <p>Authors who publish with this Open Access journal agree to the following terms:</p> <ol> <li>Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a&nbsp;<a href="" target="_new">Creative Commons Attribution License</a> 4.0 that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</li> <li>Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</li> <li>Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See&nbsp;<a href="" target="_new">The Effect of Open Access</a>).</li> </ol> Progress in a time of change Alyssa Anderson Copyright (c) 2021 Alyssa Anderson 2021-12-31 2021-12-31 34 10.5324/cjcr.v0i34.4597 The 21st International Symposium on Chironomidae Richard Cornette Copyright (c) 2021 Richard Cornette 2021-06-22 2021-06-22 34 10.5324/cjcr.v0i34.4059 Short comment on Chironomidae (Insecta: Diptera) from Brazil’s Federal District <p>There is much left to learn about the diversity of Chironomidae in Brazil. To help to resolve this problem, a preliminary study of the Chironomidae present in a stream located in center of Brazil was proposed. The aim of this research was to provide a first record of the Chironomidae assemblage at Sarandi stream, in the Brazilian Cerrado. Samples were taken using a handheld D-net from the stream in October 2009. The samples were transported to the laboratory where the material was processed and the Chironomidae specimens were slide mounted, counted and identified to genera. Ninety individuals belonging to 15 genera were found, Chironomini was the richest tribe, with seven genera, while Tanytarsini showed the highest abundance of individuals (55.6%). Overall, <em>Rheotanytarsus </em>(20%), <em>Tanytarsus ortoni</em>-group (16.7%) and <em>Lopescladius</em> (14.4%) were the most abundant genera.</p> Kathia Cristhina Sonoda Copyright (c) 2021 Kathia Cristhina Sonoda 2021-06-21 2021-06-21 34 10.5324/cjcr.v0i34.3875 Propsilocerus Kieffer, 1923 shares morphological synapomorphies with Prodiamesinae <p>In their comprehensive analysis Cranston et al. (2012) quite unexpectedly recovered a monophyletic Orthocladiinae, except that Propsilocerus Kieffer, 1923, was recovered as a representative of Prodiamesinae. In this short communication I show that Propsilocerus shares morphological synapomorphies with other Prodiamesinae – namely (i) an indirect tracheal connection of the pupal thoracic horn to the adult spiracle and (ii) a parallel-sided rami of female gonapophysis IX.</p> <p> </p> Viktor Baranov Copyright (c) 2021 Viktor Baranov 2021-09-19 2021-09-19 34 10.5324/cjcr.v0i34.4100 L. C (Clive) V. Pinder, 6 December 1943 - 31 July 2021. Peter S. Cranston Copyright (c) 2021 Peter S. Cranston 2021-09-13 2021-09-13 34 10.5324/cjcr.v0i34.4101 Leonard C. Ferrington, Jr. (1948-2021): Chironomid cognoscente and modern-day Renaissance man Raymond Bouchard Petra Kranzfelder Alyssa Anderson Copyright (c) 2021 Will Bouchard, Petra Kranzfelder, Alyssa Anderson 2021-12-31 2021-12-31 34 10.5324/cjcr.v0i34.4598 Longevities of Adult Chironomidae (Diptera) from Two Streams in Iceland <p>Mean annual air temperatures are predicted to increase by several degrees in the Arctic. This increase in temperature will likely impact organisms adapted to current conditions. Studies of longevities of winter-active Chironomidae from cold, groundwater-fed streams in Minnesota demonstrate that winter-emerging species are long-lived as adults when incubated at cold or sub-freezing air temperatures post emergence. It is unknown if this holds for species emerging in sub-arctic latitudes during warm months, or if warm air temperatures affect the adults of species emerging from cold and geothermally heated streams. The goal of this study was to determine the effects of exposure to air temperatures predicted by climate change models on the longevities of Chironomidae emerging from both cold and geothermally heated larval environments. Chironomidae were trapped at emergence from two groundwater-fed streams with contrasting (warm and cold) thermal regimes at the Hengladalir valleys in the Hengill alpine geothermal area in southwestern Iceland over 4 days in July 2018. Adults (N=102) were randomly divided into two treatments and incubated at either 20°C or 6°C for 28-32 days to determine influence of source stream and incubation temperature on adult longevity. These temperatures were selected to simulate current and predicted water and air temperatures that adult chironomids are likely to be exposed to with climate change. Adults incubated at 6°C survived longer than adults incubated at 20°C irrespective of source stream. All adults incubated at 20°C died within 1-5 days post-emergence. Longevities of taxa incubated at 6°C ranged from 13 to more than 32 days. Species of <em>Diamesa</em> exhibited the greatest longevities, with 41.7% surviving more than 28-32 days post-emergence at 6°C. We were unable to determine maximum longevity for <em>Diamesa</em> within the 6°C treatment because surviving adults had to be sacrificed at the termination of the experiment on day 32. However, the minimum longevity we report is similar to longevities determined for other <em>Diamesa </em>species and indicates that <em>Diamesa </em>species in Iceland are also long-lived under cold air temperatures. We suggest there may be a difference in longevity between sex, with females living longer than males at cold temperatures. By contrast, we found that both sexes of <em>Diamesa </em>and all other chironomid taxa that we tested are susceptible to warm air temperatures regardless of stream of origin. Therefore, warming climatic temperatures could potentially lead to shortened adult lifespans for these sub-arctic taxa.<span class="Apple-converted-space"> </span></p> Corrie Nyquist Gísli Már Gíslason Bruce Vondracek Leonard Charles Ferrington Copyright (c) 2021 Corrie Nyquist, Gísli Már Gíslason, Bruce Vondracek, Leonard Charles Ferrington 2021-06-21 2021-06-21 34 10.5324/cjcr.v0i34.3431 Pseudorthocladius immezensis sp. n., a new relict species inhabiting the Macun high-alpine stream, Swiss Alps (Diptera: Chironomidae) <div><span lang="EN-GB">Male adult of<em> Pseudorthocladius immezensis </em>sp. n</span></div> <div><span lang="EN-GB"> is diagnosed and described based on material collected in the high alpine cirque of the Macun area (Immez Lake basin, alt. 2616 m a.s.l.).</span></div> <div><span lang="EN-GB">A combination of morphological characters found in the male adult has allowed us to consider this new species as a local biogeographical representative of the eastern part of the Swiss Alps: coronal suture with lateral extension, low antennal ratio (AR 0.30); distal half of wing hairy; anal point broadly triangular with a characteristic enlarged base; inner apical margin of gonocoxite truncate; superior volsella large lobe-like; inferior volsella double, dorsal lobe nose-like and distinctly bent apically; virga present, with 4 spines; crista dorsalis absent. A differential diagnosis is given, in which some distinguishing morphological characters are summarised. Comments on the ecology and geographical distribution of the new species are also provided.</span></div> Brigitte Lods-Crozet Joel Moubayed-Breil Copyright (c) 2021 Brigitte Lods-Crozet, Joel Moubayed-Breil 2021-08-24 2021-08-24 34 10.5324/cjcr.v0i34.3985 Dicrotendipes sinicus Lin & Qi, sp. n. (Diptera: Chironomidae) <p>The name <em>Dicrotendipes sinicus</em> was originally proposed in 2018, but the requirements of the International Code of Zoological Nomenclature were not fulfilled to make the name available. We here re-propose the name with full Code compliance and redescribe and illustrate all life stages of the species to make the name available.</p> Xiaolong Lin Xin Qi Copyright (c) 2021 Xiaolong Lin, Xin Qi 2021-12-19 2021-12-19 34 10.5324/cjcr.v0i34.4079