Morphological description and DNA barcoding of some Diamesinae (Diptera Chironomidae) from the Severnaya Zemlya Archipelago and the Vaigach Island (Russian Arctic) Author Krasheninnikov, Andrey B. Institute of Biological Problems of the North Far East Branch of the Russian Academy of Sciences, Portovaya St. 18, 685000 Magadan, Russia & Perm State University, Bukireva St., 15 614990 Perm, Russia & Association “ Maritime Heritage: Explore & Sustain ”, Icebreaker “ Krassin ”, The Lieutenant Schmidt emb., 23 Line, 199106 Saint- Petersburg, Russia & krasheninnikov 2005 @ yandex. ru; http: // orcid. org / 0000 - 0001 - 9876 - 1008 Author Makarchenko, Eugenyi A. Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far East Branch of the Russian Academy of Sciences, 100 let Vladivostoku 159, 690022 Vladivostok, Russia. makarchenko @ biosoil. ru; http: // orcid. org / 0000 - 0003 - 2765 - 8729 Author Semenchenko, Alexander A. Laboratory of Ecology and Evolutionary Biology of Aquatic Organisms, School of Natural Sciences, Far Eastern Federal University, Suhanova St. 8, 690950 Vladivostok, Russia. semenchenko _ alexander @ mail. ru; https: // orcid. org / 0000 - 0001 - 7207 - 9529 Author Gavrilo, Maria V. Association “ Maritime Heritage: Explore & Sustain ”, Icebreaker “ Krassin ”, The Lieutenant Schmidt emb., 23 Line, 199106 Saint- Petersburg, Russia & m _ gavrilo @ mail. ru; https: // orcid. org / 0000 - 0002 - 3500 - 9617 Author Vshivkova, Kristina A. Perm State University, Bukireva St., 15 614990 Perm, Russia & kaktusovak @ inbox. ru; https: // orcid. org / 0000 - 0002 - 2472 - 7429 text Zootaxa 2020 2020-06-24 4802 3 587 600 journal article 10.11646/zootaxa.4802.3.13 1175-5326 3907652 3CE381FB-959E-4256-8BF0-8178DAC60AEC Arctodiamesa appendiculata (Lundström) ( Figs. 13–15 ) Diamesa appendiculata Lundström, 1915: 23 ; Goetghebuer 1939: 11 ; Makarchenko 1978: 56 . Arctodiamesa appendiculata (Lundström) Makarchenko 1983: 264 , 1984: 96 , 1985: 54 , 2006: 259 , 471, 610; Ashe &O’Connor 2009: 263 . Material examined. 2 adult males, RUSSIA : Severnaya Zemlya Archipelago , Bolshevik Island , estuary of the nameless river, 27.VII.2018 , leg. A. Loginov. Adult male (n=2). Wing length 3.3–3.4 mm . Colouration. Total colour brown to dark brown, wings greyish. Head. Eyes hairy. Temporal setae including 9 outer verticals and 3–4 postorbitals. Clypeus with 10–11 setae. Antenna with 13 flagellomeres and well-developed plume; terminal flagellomere with 1–2 subapical setae 27–39 µm long; AR 1.2–1.4. Palpomeres lengths (in μm): 47–51; 82–90; 133; 106–110; 149–161; palpomere 3 without sensilla capitata. Head width/palp length 1.04. Thorax. Antepronotum with 8 ventrolateral setae. Dorsocentrals 7–10, prealars 6–8, scutellars ca 20. Wing. R with 8–11 setae, R 1 with 7 setae, R 2+3 with 4 pores, R 4+5 with 1–2 setae. Anal lobe well developed. Costa extention 62–78 μm. Squama with 35 setae. Legs. Spur of fore tibia 67–71 μm long; spurs of mid tibia 55–59 μm and 39–43 μm long; of hind tibia 71–78 μm and 47 μm long. Hind tibial comb with 14 setae. Lengths and proportions of leg segments as in Table 4 . Hypopygium ( Figs. 13–15 ). Laterosternite IX with 5–13 setae. Tergite IX with 42–49 setae. Anal point 51 μm long, with 2 setae 27–35 μm long on apex. Transverse sternapodeme 176–184 μm long; distal part of phallapodeme 165–180 μm long; basimedial part 60 μm long. Medial aedeagal lobe strong sclerotized, with large apical spines. Gonocoxite 353–361 μm long; medial field broad and flat, covered with short setae. Gonostylus bifurcate, 157–176 μm long, outer branch 125–137 μm long, in 1.6–2.1 times longer than inner branch; inner branch with broad and serrated megaseta 10–12 μm long. HR 2.0–2.3. FIGURES 13–15. Arctodiamesa appendiculata (Lundström) , male. 13, hypopygium in dorsal view; 14, inner structures of hypopygium; 15, distal part of gonostylus. Comments. The adult males of A. appendiculata from Severnaya Zemlya Archipelago fits into the description of the species from other regions of the Arctic and Subarctic ( Makarchenko 1984 , 2006 ). Specimens of all popula- tions of this species are characterized by a slight variability in the ratio of the length of the inner branch to the length of the outer branch of the gonostylus. So, for males from the Wrangel Island, Chaun Bay, the Chukchi Peninsula and the Severnaya Zemlya Archipelago this ratio is respectively 1.34–1.50, 2.03, 1.82, 1.6–2.1. Distribution. Holarctic arcto-alpine species, known from the upper stream of Kolyma River, Arctic regions of Eurasia and Alaska ( Ashe & O’Connor 2009 ).