Pagastia (Pagastia) orthogonia Oliver 1959

• Main Author: Makarchenko, Eugenyi A.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2019
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Chironomidae; Pagastia; Pagastia orthogonia; Caldwell; Culp; Valley Creek; Tundra; Alaska
• Online Access: https://zenodo.org/record/5586608; https://doi.org/10.5281/zenodo.5586608

Pagastia (P.) orthogonia Oliver (Figs. 7–13, 21, 26–32) Pagastia orthogonia Oliver, 1959: 51; Makarchenko & Makarchenko 2000: 174; Endo 2004: 283; Caldwell 2007: 70; Ashe & O’Connor 2009: 296; Namayandeh & Culp 2016: 206; Namayandeh et al. 2016: 58. Pagastia sp. A Oliver, Roussel 1982: 854. Material. Holotype: 1 adult male, U.S.A.: Alaska, 163º W, Cold Bay, on tundra, 18.VIII.1952, leg. W.R. Mason, CNC no. 19627. Paratype: 1 adult male, U.S.A., Michigan, Epoufette, 15.V.1955, leg. J.R. Vockeroth. 1 adult male (reared), exuviae of pupa and larval skin, U.S.A., Wisconsin, 11 miles East, 4 miles South of Siren, Burnett County, cold stream (Spring Brook), 22.I.–28.II.1967, leg. D. Hansen, slide DH 69-182; 2 adult males, same location, light trap, 1–2.V.1968, leg. D. Hansen; 2 adult males, same location, 21.IX.1968, leg. D. Hansen; 7 larvae, same location, Spring Brook, drift trap, 7–8.IX.2014, leg. D. Hansen; 13 larvae, same location, Spring Brook, 24.I.2016, leg. D. Hansen. 1 adult male, 16 pupal exuviae, U.S.A.: South Dakota, Lawrence County, 3 miles West, 10 miles South of Spearfish, Spearfish Creek, alt. 1585 m, 29.IX.1968, leg. D. Hansen. 7 pupal exuviae, U.S.A., Minnesota, Washington County, first order, summer-cool stream, Valley Creek, drift trap, 9–10.V.2015, leg. D. Hansen. Adult male (n = 5). Total length 3.8–5.3 mm. Total length/wing length 1.42–1.57. Coloration. Head, thorax, legs, and abdomen brown to dark brown; antennae light brown or yellowish-brown; wings greyish. Head. Eyes bare and extended dorsomedially. Temporal setae consisting of 4 coronals, 1–3 orbitals, 8–13 verticals, and 6–12 postorbitals. Clypeus with 11–21 setae. Antenna with 13 flagellomeres and a well developed plume; pedicel with 2 setae 52–60 μm long; terminal flagellomere with 1 subapical setae 20–60 μm long. AR 1.58–1.95. Palpomere lengths (in μm): 40–48; 80–92; 156–196; 148–188; 168–200. Distal part of palpomere 3 with sensilla capitata of 8–12 μm diameter. Palpomeres 1–5 length/head width 0.99–1.04. Thorax. ...