Parachironomus poyangensis Yan, Yan, Jiang, Guo, Liu, Ge, Wang & Pan 2015

Male imago (n=3). Total length 2.25–2.32, 2.28 mm. Wing length 1.08–1.11, 1.10 mm. Total length / wing length 2.08–2.09, 2.09. Wing length / length of profemur 2.20–2.30, 2.25. Coloration. Thorax yellowish green. Femora of front legs yellowish green with distal parts brown, tibiae and tarsomeres dark brown; mid and hind legs yellowish green with tarsomeres IV, V dark brown. Abdomen yellowish green. Head. AR 1.76–1.84, 1.80. Terminal flagellomere 450–470, 462 mm long. Frontal tubercles absent. Temporal setae 11–13, 12, including 3 inner verticals, 3–4, 3 outer verticals and 5–6, 5 postorbitals. Clypeus with 15–18, 17 setae. Tentorium 90–95, 92 mm long, 25–26, 25 mm wide. Palpomere lengths (in mm): 25–27, 26; 30–32, 31; 83–85, 84; 98–104, 100; 145–156, 151. Length ratio 5th /3rd palpomere 1.75–1.78, 1.77. Thorax. Antepronotals 3–4, 3; acrostichals 8–9, 9; dorsocentrals 10–12, 11; prealars 3. Scutellum with 5–6, 5 setae. Wing (Fig. 11). VR 1.15–1.17, 1.16. Cell surfaces without setae. R with 11–13, 12 setae, R1 with 8–9, 8 setae, R4+5 with 17–18, 17 setae. Brachiolum with 2 setae. Squama with 10–12, 11 setae. Legs. Front tibia with 2 subapical setae, 108–110, 109 and 118–130, 126 µm long, mid and hind tibiae each with a single spur, spur of middle tibia 20–22, 21 µm long, comb with 28–30, 31 teeth, 10 µm long; spur of hind tibia 28–30, 29 µm long, comb with 42–46, 44 teeth, 10–12, 11 µm long. Tarsus 1 of mid leg with 6–7, 7 sensilla chaetica, hind leg without sensilla chaetica. Lengths (in µm) and proportions of legs as in Table 3. Lengths (µm) and proportions of adult male legs in Parachironomus poyangensis sp. n. (n=3). fe ti ta1 ta2 ta3 ta4 ta5 LR p1 470–500, 490 310–330, 320 540–560, 550 340-380, 360 230–250, 243 160–180, 166 90–100, 93 1.69–1.74, 1.71 p2 440–470, 456 350–380, 363 220–250, 233 120–140, 130 110–130, 120 70–80, 73 50–70, 60 0.63–0.66, 0.65 p3 480–530, 503 490–520, 506 340–370, 353 200–220, 210 170–200, 183 100–130, 113 70–80, 73 0.70–0.74, 0.72 Hypopygium (Figs 12, 13). Laterosternite IX with 3–4, 3 setae. Anal tergite bands V-shaped. Tergite IX with conical posterior margin, bearing 13–15, 14 setae at base of anal point. Anal point originating from caudal margin of anal tergite, parallel-sided, slightly pointed apically, 50–55, 52 mm long, 6–8, 7 mm wide at base, 4–5, 4 mm wide at apex. Transverse sternapodeme 27–32, 30 mm long. Phallapodeme 45–48, 46 mm long. Superior volsella straight, columnar, distal parts not widened, with an apical seta and a subapical seta, both arising from distinct setal pits. Inferior volsella with a moderately blunt caudal projection, not reaching beyond caudal margin of anal tergite. Gonocoxite 75–80, 77 mm long, with 3–4, 3 strong medial setae. Gonostylus 112–115, 113 mm long, parallel-sided, curved distally, bearing 8–10, 9 setae along distal inner margin. HR 0.65–0.70, 0.67; HV 1.96–2.02, 1.99.

The species is known only from the type locality in Oriental China.