Tanytarsini (Diptera: Chironomidae) collected during Polish expeditions to North Korea Author Giłka, Wojciech 0000-0002-8403-5432 University of Gdańsk, Faculty of Biology, Department of Invertebrate Zoology and Parasitology, Laboratory of Systematic Zoology; Wita Stwosza 59, 80 - 308 Gdańsk, Poland. & wojciech. gilka @ ug. edu. pl; https: // orcid. org / 0000 - 0002 - 8403 - 5432 wojciech.gilka@ug.edu.pl Author Gadawski, Piotr 0000-0001-9334-1960 University of Lódź, Faculty of Biology and Environmental Protection, Department of Invertebrate Zoology and Hydrobiology; Banacha 12 / 16, 90 - 237 Łódź, Poland. & piotr. gadawski @ biol. uni. lodz. pl; https: // orcid. org / 0000 - 0001 - 9334 - 1960 piotr.gadawski@biol.uni.lodz.pl text Zootaxa 2022 2022-12-01 5214 2 151 175 journal article 198863 10.11646/zootaxa.5214.2.1 14abb8a4-9e30-4d40-83b4-c725db688c72 1175-5326 7384985 8E7D1FC9-FD58-4DB3-ACA6-5AE38BDB6B0A Tanytarsus oscillans Johannsen, 1932 Tanytarsus oscillans Johannsen, 1932 : Ekrem 2002: 24 (male, figs 34, 35; Indonesia ; = Tanytarsus cultellus Chaudhuri et Datta, 1992 , = Tanytarsus sibafegeus Sasa, Sumita et Suzuki, 1999 ). Material examined. Kaesŏng , 16 July 1981 , 4 males ; Sokam , 8 July 1981 , 3 males ; leg. W. Krzemiński. Comparative material. Tanytarsus smolandicus : Sweden , Nedre Dalälven , 11 August 2003 , 1 male , Storsjön , 18 July 2003 , 20 males ; leg. W. Giłka. Remarks. Ekrem (2002) redescribed the male of Tanytarsus oscillans based on the holotype specimen. In remarks on its close relatives, T. smolandicus Brundin, 1947 ( terra typica in Sweden ) and T. unagiseptimus Sasa, 1985 ( Japan ) , selected diagnostic characters were indicated to separate these species. It seems, however, that these features (number of median setae, length of frontal tubercles, AR value, presence/absence of microtrichia between anal point crests and slight differences in shape of inferior volsella), in part at least, may be within the morphological variability of T. oscillans and/or T. smolandicus . According to the concept by Lin et. al . (2018b), T. oscillans and T. unagiseptimus are sister species (not ascribed to any group analyzed) while T. smolandicus has not been included. Interestingly, a concept of possible synonymy between the abovementioned names has been raised recently, when DNA sequences from specimens sampled in Fennoscandia and Japan , determined as T. oscillans or T. unagiseptimus , have been compared that resulted in ~97–98% of DNA sequence compatibility (Paasivirta, pers. comm.). Unfortunately, our specimens collected decades ago (kept in denatured ethanol or slide-mounted in Canada balsam) do not give a chance to be analyzed molecularly for supporting this concept.