Parachironomus hazelriggi Spies 2000

• Main Author: Orel, Oksana V.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Chironomidae; Parachironomus; Parachironomus hazelriggi; Combs; Chaun; Chukotka
• Online Access: https://zenodo.org/record/6041552; https://doi.org/10.5281/zenodo.6041552

Parachironomus hazelriggi Spies, 2000 (Figs 5–10, 17–21) Parachironomus hazelriggi Spies, 2000: 133, figs 5, 11. Material. Four males, Russia, Chukotka Autonomous Region, Chaunskaia Guba, Chaun River, 17.vii.1978, leg. E. Makarchenko. Male imago (n=1 to 4). See also Table 5. Total length 4.8–5.2 mm. Coloration. Scape brown; ground color of thorax pale yellow, mesonotal stripes and postnotum brown; abdomen and legs brown. Head. Frontal tubercles absent. Temporal setae 30–35. Clypeus with 25–30 setae. Antenna 1218–1302 µm long. AR 2.63–2.81. Maxillary palpomeres 2–4 combined 664–704 µm long, their individual lengths (in µm): 64– 72; 160–192; 184–200; 232–256. Antenna length/palp length 1.76–2.09. Palp length/head width 1.09–1.17. Thorax. Antepronotals 9–14, acrostichals 21–25, dorsocentrals 20–34, prealars 8–12, supraalars 1. Scutellum with 23–33 setae. Wing. Length 2.60–2.64 mm. VR 1.09–1.13. R with 24–31, R1 with 21–25, R4+5 with 25–35 setae in distal 2/3, M1+2 without setae. Squama with 23–31 setae. Legs. See Table 2. Each mid and hind tibia with 2 fused combs and 2 spurs (length 34–37 µm). BR P1 3.33– 3.75, BR P2 3.43–3.70. Hind tarsomeres lost from all 4 specimens. continued. Hypopygium (Figs 5–10, 17–21). Laterosternite IX with 3–4 setae. Anal tergite bands separate, with median longitudinal part. Anal point in dorsal view length 156–177 µm, at about apex width 14 µm; anal point in lateral view straight and narrow, the base width 37 µm, at about apex width 14 µm with wider, tapering basal half (length 68–78 µm) that carries microtrichia and 9–13 lateral to dorsal setae (from 4 specimens only 1 with 1–2 dorsal setae), and with parallel-sided, bare distal half. Portal setae (see Spies 2000) 2–4 on each side; if>2 setae, these are separated by distances at last equal to the diameter of their bases, if only 2 setae, the distance between them is 3-4 times the diameter of the bases. Transverse sternapodeme 95 µm long. Superior volsella (119–126 µm long) straight both in the dorsal and lateral views, little to ...