Derotanypus sibiricus Kruglova & Chernovskii

• Main Author: Saether, Ole A.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2004
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Chironomidae; Derotanypus; Derotanypus sibiricus; Seta; Arctic
• Online Access: https://zenodo.org/record/6271228; https://doi.org/10.5281/zenodo.6271228

Derotanypus sibiricus (Kruglova & Chernovskii) (Figs. 27–29) Anatopynia sibirica Kruglova & Chernovskii, 1940: 2. Derotanypus sibiricus (Kruglova & Chernovskii), Fittkau & Roback (1983: 48) Derotanypus Pe 1 Langton (1991: 22). Type material. Lectotype ɗ of D. sibiricus, here designated: RUSSIA: Tomsk, Universitetsk ozewo (Lake Universitetskoe in the confines of the City of Tomsk), 27 iii 1940, W. M. Kruglova, (Zoological Institute, Russian Academy of Sciences St. Petersburg, Russia). Paralectotypes 2 Ψ of D. sibiricus, as lectotype except 5–15 iii 1940 and 28 iii 1940. MALE IMAGO (n = 1) Total length 8.09 mm. Wing length 4.27 mm. Total length/wing length 1.90. Wing length/length of profemur 2.39. Coloration brown with darker vittae and markings. Legs pale brown with femora, basal and apical tibial bands and ta 3 –ta 5 brown. Wing with dark spot over both cross­veins. Head. Antenna lost. Temporal setae 51, including 13 inner verticals, 16 outer verticals, and 22 postorbitals. Clypeus with 46 setae. Tentorium 244 m long, 83 m wide. Stipes about 225 m long. Palpomere lengths (in m): 98, 169, 225, 281, 330. Thorax. Antepronotals not countable. Acrostichals about 55, dorsocentrals about 70, prealars 45, median anepisternum II with 13 setae, preepisternum with 24 setae. Scutellum with about 90 setae. Wing. VR 0.94. Costal extension 131 m long, RM 206 m long, MCu 113 m long, distance between MCu and RM 19 m. Wing membrane with numerous setae in apical half. Cell m with 1 seta, cell r with 46 apical setae, r 1 with 9, r 2 + 3 with 23 setae, numerous setae each in cells r 4 + 5, m 1 + 2 and m 3 + 4. Subcosta bare, brachiolum with 12 setae, R with 82, R 1 with 100, R 2 + 3 with 35, R 2 with 10, R 3 with 36, R 4 + 5 with 170, RM with 4, M with 13, M 1 + 2 with about 60, M 3 + 4 with about 60, Cu with 16, Cu 1 with about 40, postcubitus with about 12, An with about 35 setae, costal extension with 14–20 non­marginal setae. Squama with about 75 setae. Legs. Spur of front tibia 124 m long, with 15 lateral ...