| Summary: | Stempellinella chirka sp. nov. Figs 8–34. http://zoobank.org/NomenclaturalActs/ F96C60BD-ABBE-4E37-94F7-4BA034B97BE7 Stempellinella sp. 1 Makarchenko et Orel, 2023: 145. Type material. HOLOTYPE: male, RUSSIA : KHABAROVSK TERRITORY, Bolshekhekhtsyrsky Reserve, Chirka river basin, Odyr River, 19.vi.2016, leg. N. Yavorskaya. PARATYPES: 4 males, same data as holotype; Zolotoy Stream, 20.vi.2015, 5 males, leg. N. Yavorskaya; mouth of the Svetlaya River, 23.vii.2006, 1 male, leg. N. Yavorskaya; PRIMORSKY TERRITORY, Khasansky District, Barabashevka River, 31.v.2003, 2 males, leg. T. Tiunova; Lazovsky district, Lazovsky reserve, Pryamushka river basin, Kaplanov Stream, 10.vii.2007, 3 males, leg. O. Zorina; SAKHALIN REGION, Sakhalin Island, Tymovsky District, Tym River in the area of the mushroom cooker, 27.vii.2003, 10 males, leg. E. Makarchenko. Derivatio nominis. From the type locality Chirka River, into which the Odyr River flows—one of the habitats of the new species. Diagnosis. Male: yellowish brown coloured species, with wing 1.06–1.34 mm long. AR 0.82–1.00; ultimate flagellomere 264–360 μm; length of 2–4 flagellomeres of maxillary palpomeres 282–318 μm; frontal tubercles conical, 9–18 μm long. LR PI 1.51–1.55; combs of mid and hind tibiae with 1 strong spur. Anal tergite with transverse anal tergite band; 2–6 strong median setae; lateral setae 0–2; anal point with strong spinulae at base (7–14); superior volsella oval; median volsella oval or round shape, 21–30 μm long, cover with microtrichia and with 10–15 small setae. Pupa: frontal tubercles well-developed, tubular, 30–36 μm long; frontal setae taeniate, 195–225 μm long; frontal apotome without granulation. Thoracic horn 315–330 μm long, elongate, with minute spines on distal part; tergite II with comparatively large, triangular shagreen on distal half, hook rows with 35–48 hooks; III–V with π-shaped small median shagreen; VI with π-shaped small median shagreen and two anterolateral patches of spines; VII in proximal part with two patches of shagreen; ...
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