Chironomid Exchange Forum

2023

Belle, S., Johnson, R. K. (2023) Acidification of freshwater lakes in Scandinavia: impacts and recovery of chironomid communities under accelerating environmental changes. Hydrobiologia: 16 pp. + online suppl. material. [publd online 19.ix.2023]

Egri, Á., Pereszlényi, Á., Szekeres, J., Száz, D., Horváth, G., Kriska, Gy. (2023) Ecological advantage of polarized light pollution: positive effect of a dark lake patch at a canal inflow on habitat of non-biting midges. Limnology: 13 pp. + online suppl. material (incl. 3 videos). [publd online 11.xi.2023]

Głowacki, Ł., Leszczýnska, J., Grzybkowska, M., Pyrzanowski, K., Dukowska, M., Przybylski, M. (2023) Determinants of chironomid species richness in mid-European temperate rivers – Environmental factors, regional influences, diversity, and seasons. Ecol. Indicators 147(paper 109838): 14 pp. + online suppl. material. [publd online 4.ii.2023]

Jin, B., Pan, Ch., Xia, N., Song, J., Luo, H., Zhang, L., Ding, Y. (2023) Swimming of the midge larva: Principles and tricks of locomotion at intermediate Reynolds number. Physics of Fluids 35(3, paper 031903): 12 pp. [publd 14.iii.2023]

Lencioni, V., Adler, P. H., Courtney, G. W. (2023) Order Diptera. Pp. 503-535 in: Maasri, A., Thorp, J. H. (eds), Identification and ecology of freshwater arthropods in the Mediterranean Basin. Elsevier, Amsterdam etc. [publd 27.x.2023. NOTE: subchapters 15.1 to 15.3 have different respective authorship]

Lencioni, V., Moubayed, J., Langton, P. H. (2023) [Chapter 15.2] Family Chironomidae. Pp. 553-602 in: Maasri, A., Thorp, J. H. (eds), Identification and ecology of freshwater arthropods in the Mediterranean Basin. Elsevier, Amsterdam etc. [publd 27.x.2023]

Shaikhutdinov, N. M., Klink, G. V., Garushyants, S. K., Kozlova, O. S., Cherkasov, A. V., Kikawada, T., Okuda, T., Pemba, D., Shagimardanova, E. I., Penin, A. A., Deviatiiarov, R. M., Gazizova, G. R., Cornette, R., Gusev, O. A., Bazykin, G. A. (2023) Population genomics of two closely related anhydrobiotic midges reveals differences in adaptation to extreme desiccation. Genome Biol. Evol. 15(10, Article evad169): 15 pp. + online suppl. material. [publd 14.ix.2023]

Yes surely; unfortunately the wings are not in good condition so it is not clear if Cu brings setae; median volsella lamellae are also difficult to analyze, but I cannot exclude that they are branched; body colour is very light suggesting T. heusdensis, because T. reei is described with darker vittae, only the enlarged digitus suggests T. reei; Molgora is a stream in lowland, the habitat is also compatible with T. heusdensis.
My conclusion is that the species is T.heusdensis, the presence of T.reei in Italy at present is not supported.

Not exactly as Bruno wrote. The structure of tibial cobms and spurs is rather weak character for separation the two genera - combs can be slightly separated and armed with a short spur in both Tanytarsus and Paratanytarsus.
Besides, I was able to see hypopygium only. The presence of spinulae (absent in Paratanytarsus) is the best key character in this case. The species fits the concept of the heusdensis group and should be compared with T. reei.

Looks similar to Tanytarsus reei Na et Bae, 2010 (Tanytarsus heusdensis group)

An important addition; I overlooked tibial combs, they are clearly separated, this character suggests Tanytarsus not Paratanytarsus as genus; I thanks Wojciech Gilka for the having put me on the advice

Yes Molgora is a stream running at East of Milano;
I suspected some similarity with P. corsicanus (publ. in Fauna Norvegica) but anal point in dorsal aspect seems different, and I have not the lateral aspect; digitus seems also different, only median volsella is similar

Dear Bruno,

In order to narrow down the range of references that may have to be consulted: Do I gather correctly that the source for your material is the Torrente Molgora, a (?fast-)running water East of Milano?

Best,

Martin Spies

The species has a characteristic anal point a short median volsella and a superior volsella with a large digitus, can somebody help me in identification ?

Dear Bruno,

In my opinion you are right that the name Chironomus nuditarsis is nomenclaturally available from the Keyl (1961) work you refer to. The material had been generated by Strenzke, who apparently never got around to describing the species morphologically. However, in

Klötzli, A. M. (1974) Revision der Gattung Chironomus Meig. V. Chironomus nuditarsis Keyl. Morphologische Beschreibung und Vergleich mit ähnlichen Arten. Archiv Hydrobiol. 74(1): 68-81. [publd "August 1974"; in German, with English abstract]

the author reported on page 69 that Keyl had 'courteously made available for our morphological work the nuditarsis material collected by Strenzke'.

Thus, for morphology I would (first) consult Klötzli's work, even if some morphological data may be found in earlier publications. The publication sequence of morphological treatments of the species is nomenclaturally irrelevant, as the species name is available from Keyl (1961).

For all such cases involving names in Chironomus, please recall - among possible others - the following two highly useful sources of information.

Lindeberg, B., Wiederholm, T. (1979) Notes on the taxonomy of European species of Chironomus (Diptera: Chironomidae). In: Sæther, O. A. (ed.): Recent developments in chironomid studies (Diptera: Chironomidae). Ent. scand. Suppl. 10: 99-116.

Dr. Jon Martin's highly helpful webpages, e.g. https://www.chironomidae.net/Martin/JMRes.html, in the present case especially https://www.chironomidae.net/Martin/Chironfiles/Names.htm

Best regards,

Martin Spies (SNSB-ZSM, Munich)

Dear chironomid researchers,

We are pleased to inform you that the abstract submission for the 22nd International Symposium on Chironomidae ISC22 is now open! The conference is scheduled to take place in Niš, Serbia from June 16 to 19, 2024.

Don't miss out on the early bird registration, which is available until December 31, 2023!

Join the pre-symposium workshops, explore new topics, and improve your skills by applying for three courses FREE OF CHARGE! Additionally, we have provided general information about the post-symposium Field Trip. We encourage you to explore these offerings further and consider integrating them into your ISC22 journey.

We are looking forward to welcoming you to Niš, a city known for its kind and hospitable people, delicious traditional dishes, and numerous historical sights.

Read more about the event and stay in touch with the updates by visiting the ISC22 website at https://isc22.mondorama-kongresi.rs/

Warm regards,

On behalf of the Organization Committee,
Jelena Stojanović