Derotanypus limbatus Lundstrom, comb. n.

• Main Author: Saether, Ole A.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2004
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Chironomidae; Derotanypus; Derotanypus limbatus; Arctic; New Siberian Islands
• Online Access: https://doi.org/10.5281/zenodo.6271224; http://treatment.plazi.org/id/125B084CFFC6FFFA926120B1DDADF540

Derotanypus limbatus (Lundström), comb. n. (Figs. 24–26) Ablabesmyia limbata Lundström, 1915: 24. Ablabesmyia quadrinotata Lundström, 1915: 25, syn. n. Type material . Lectotype ɗ, here designated: RUSSIA: New Siberian Islands, "Holzgebirge”, 24 vi 1902, A. A. Birula. Paralectotypes: RUSSIA: New Siberian Islands, west coast, beach of the river Bolschaja, and Kotelnyj Islands, 1 ɗ, 2 Ψ, 18 vi, 2 vii 1903 [24 (11) vi 1903 in Lundström]; M. I. Brussnew. Holotype ɗ of A. quadrinotata : RUSSIA: New Siberian Islands, north coast at a lake, 4 vii (21 vi) 1902, A. A. Birula. MALE IMAGO (n = 1–3) Total length 7.08–7.86 mm. Wing length 3.94–4.60 mm. Total length/wing length 1.71–1.80. Wing length/length of profemur 2.38. Coloration yellowish brown to brownish black with darker vittae. Legs uniformly dark brown or, in A. quadrinotata , pale brown. Wing with dark spot over both cross­veins. Head. AR 2.71–2.88. Penultimate flagellomere 1210–1332 m long, ultimate flagellomere 123–132 m long. Temporal setae 58–65, including 14–18 inner verticals, 18–30 outer verticals, and 14–29 postorbitals. Clypeus with 38–58 setae. Tentorium 311– 326 m long, 64–86 m wide. Stipes 285–311 m long, 86 m wide. Palpomere lengths (in m): 90–94, 206–225, 319–424, 300–339, 319. Thorax. Antepronotum with 78 setae. Acrostichals about 65–75, dorsocentrals about 65–100, prealars 50–61, median anepisternum II with 20–30 setae, preepisternum with 16– 22 setae. Scutellum with about 65–100 setae. Wing. VR 0.94. Costal extension 120–150 m long, RM 188–195 m long, MCu 94– 120 m long, distance between MCu and RM 8– 19 m. Wing membrane with numerous setae in apical half. Cell m and anal lobe bare, cell r with 14–16 apical setae, r1 with 4, r2+3 with 7 setae, numerous setae each in cells r4+5, m1+2 and m3+4. Subcosta, RM, M and postcubitus bare, brachiolum with 8–12 setae, R with 58–78, R1 with 72–84, R2+3 with 7–15, R2 with 2–5, R3 with 12–16, R4+5 with 98–103 setae, costal extension with 14–20 non­marginal setae, M1+2 with about 35–55, M3+4 with about 50, Cu1 ...