Diamesa tsutsuii Tokunaga

• Main Author: Makarchenko, Eugenyi A.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Chironomidae; Diamesa; Diamesa tsutsuii; Sakhalin
• Online Access: https://doi.org/10.5281/zenodo.7990914; http://treatment.plazi.org/id/220787BAFFD39C25FF6DFAABF0E6FBBA

Diamesa tsutsuii Tokunaga (Figs. 1–4, 7–17) Diamesa tsutsuii Tokunaga, 1936: 546; 1964: 22; Makarchenko 1977: 113, 1985: 82; 2006: 261, 477, 614; Linevich & Makarchenko 1989: 32; Ashe & O’Connor 2009: 287; Makarchenko & Makarchenko 2017: 130. Diamesa coquilletti Sublette, 1966: 584; Hansen & Cook 1976: 78. Syn. nov. Diamesa matuimpedita Sasa, 1989: 149–150. Material examined. Japan: 1 adult male (holotype), Nagano Prefecture, Hosono, from snow, alt. 600 m above sea level, 17.III.1935, leg. K. Tsutsui. Russia: 15 adult males, 5 pupae, 11 larvae, Primorye Territory, Khasansk District, Kedrovaya Pad Nature Reserve, Kedrovaya River, 15–17.II.1975, leg. E. Makarchenko; 1 adult male, Ternei District, Sikhote-Alin Nature Reserve, Spornyi Stream (Serebrianka River basin), leg. O. Zorina; 12 adult males, 6 pupae, 14 larvae, Jewish Autonomous Region, Obluchie District, Bidzhan River, (Amur River basin), from snow, N 48º38’409’’, E 131º37’217’’, 27.III.2013, leg. E. Makarchenko; 5 adult males, Khabarovsk Territory, Nanaisky District, Anyuisky National Park, Pihtsa River (tributary of Gassi Lake), Amur River basin, 25. V 2019, leg. N. Yavorskaya; 2 adult males, Magadan Region, Olskyi District, Ola River, 29.IV.2014, leg. E. Khamenkova, 2 adult males, the same data except 3. V.2019, leg. E. Khamenkova; 3 adult males, 3 pupae, Sakhalin Island, Yuzhno-Sakhalinsk City, Bereznjaki River, 17.IV.2015, leg. E. Zhivogliadova. Adult male (n = 7, except when otherwise stated). Total length 4.3–6.2 mm. Wing length 3.2–4.0 mm. Total length/wing length 1.33–1.35. Coloration. Head, thorax, legs, and abdomen dark brown; scutellum brown, palp light brown, antennae brown to dark brown; wings greyish, with brownish veins. Head. Eyes hairy, reniform. Temporal setae including 7–8 preoculars, 8–11 verticals and 3–4 postorbitals. Clypeus with 11–14 setae. Antenna with 8 flagellomeres and reduced plume of setae (Fig. 1); number and length of these setae on 1–7 flagellomeres respectively (n=2): 2–3 (36–40 μm), 1 (40–42 μm), 3–4 ...