Shilovia xinhuawangi Makarchenko et Semenchenko,

Makarchenko, Eugenyi A., Semenchenko, Alexander A. & Palatov, Dmitry M., 2020, Review of the genus Shilovia Makarchenko (Diptera: Chironomidae: Diamesinae Boreoheptagyiini) from the mountains of Central Asia, with morphological description and DNA barcoding of known species, Zootaxa 4895 (2), pp. 196-210: 202-203

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Shilovia xinhuawangi Makarchenko et Semenchenko

sp. nov.

Shilovia xinhuawangi Makarchenko et Semenchenko  , sp. nov. EFD248D8-FC5F-46E7-938D-A137BAF6071D

( Figs. 10–16View FIGURES 10–15View FIGURES 16–20, 22, 27View FIGURES 21–27)

Type material. Holotype, adult male, CHINA: Xinjiang Uygur Autonomous Region, Tien Shan Mountains, Bogdo-Ula Range , Daong River , altitude 2030 m above sea level, 8.VII.2017, N 43°51.346’, E 88°09.633’, leg. D. Palatov.GoogleMaps  Paratypes: 41 adult males, the same data as holotypeGoogleMaps  .

Derivatio nominis. The species is named in honour of the Chinese chironomid taxonomist, Professor of Nankai University Xinhua Wang.


Adult male (n = 6, except when otherwise stated). Total length 2.16–2.36 m. Total length/wing length 0.95– 1.07.

Coloration. Brown to dark-brown. Mesonotum dark brown ( Fig. 12View FIGURES 10–15). Wings grey. Legs: at least basal 3/4 of femur yellowish or yellow, distal 1/4 dark brown; tibia, ta 1 –ta 5 dark brown ( Fig. 16View FIGURES 16–20). Abdomen dark brown.

Head. Eyes pubescent. Temporal setae 70–72, including frontals, verticals, postorbitals which can not be easy separated. Clypeus with 11–12 setae. Palpomere length (μm): 28–32, 68–76, 108–116, 108–124, 180–182. Head width/palpal length 0.88–0.95. Antenna with 6 flagellomeres and reduced plume of setae ( Fig. 11View FIGURES 10–15); number and length of these setae on 1–5 flagellomeres respectively: 5–7 (40–64 μm), 5–6 (48–72 μm), 3–5 (40–68 μm), 5–6 (40–80 μm); terminal flagellomere with 2–3 setae, 24–40 μm long in subapical and apical area. Length of 1–6 flag-ellomeres (μm): 52–64, 40, 38–44, 32–40, 32–40, 68–84; AR 0.32–0.37. Antennal length/palpal length 0.54–0.62.

Thorax. Antepronotum with 10–15 ventrolateral setae, 40–60 μm long. Acrostichals 29–46, 16–40 μm long, start from anteropronotum, in 1–2 rows. Dorsocentrals 50–70, 25–48 μm long (Fig. 00), in 2–4 rows, in anterior part of mesonotum reach preanal setae, and in posterior part they converge with acrostichal setae ( Fig. 12View FIGURES 10–15); prealars 35–84, 44–80 μm long, in 2–3 rows; supraalars 4–7, 36–40 μm long. Scutellum with 48–52 setae, 64–76 μm long. Postnotum with 4–17 setae, 40–52 μm long ( Fig. 13View FIGURES 10–15). Preepisternum with 14–21 setae, 28–48 μm long. MAII with 2–3 setae, 36 μm long.

Wing. Length 2.16–2.36 mm, width 0.58–0.64 mm. Costal extension 60–70 µm long. Anal lobe slightly re-duced, rounded-angular. Squama with 12–23 setae, 40–68 μm long, in 1–3 rows. R and R 1 with 46–53 setae, in basal ¼ in 2 rows; R 4+5 with 9–19 setae, R 2+3 absent, Cu with 5–14 setae, An with 2–16 setae in basal part ( Fig. 10View FIGURES 10–15). RM/MCu 1.6–2.0.

Legs. Spur of front tibia 36–64 µm long. Spurs of mid tibia 44–60 µm and 48–64 µm long. Spurs of hind tibia 72–84 µm and 44–68 µm long. Hind tibial comb with 11–13 setae. Fore leg with 2 apical pseudospurs on ta 1, 36– 40 µm long; mid leg with 2–5 pseudospurs, 32–36 µm long on ta 1, hind legs with 4–6 pseudospurs, 32–40 µm long on ta 1. Length (μm) and proportions of leg segments are as in Table 2.

Hypopygium ( Figs. 14–15View FIGURES 10–15, 22, 27View FIGURES 21–27). Tergite IX with 69–77 setae, 8–20 µm long; posterior edge almost straight ( Fig. 14View FIGURES 10–15). Laterosternite IX with 4–5 setae, 20–24 µm long. Sternapodeme length 84–120 µm and 68–92 µm wide in basal part, 24–32 µm wide in subapical part. Aedeagal lobe weakly sclerotized, apical part fingerlike or hooked, 120–124 µm long; phallapodeme sclerotized, 60–68 µm long ( Figs.15View FIGURES 10–15, 27View FIGURES 21–27). Gonocoxite 368–412 µm long, with 68– 88 µm long apical projection (“heel”) which densely covered with thin setae, 48–60 µm long, and “heel” posterior to gonostylus 0.40–0.63 times as long as gonostylus; inferior volsella in form of tubercle, densely covered with macrotrichiae and setae, 8–16 µm long. Gonostylus strongly curved in distal 2/3, 132– 176 µm long, in distal half covered with setae, 5–12 µm long, on the outer edge without rounded extension, apically with yellowish-brown megaseta and dark brown or black tooth ( Figs. 14–15View FIGURES 10–15, 22View FIGURES 21–27); gonostylus length/gonostylus width 2.86–3.67. HR 2.06–2.51.

Diagnosis. See the key below.

Ecology. Adults, pupae and larvae were collected from stones and boulders in mountain river, located at an altitude of 2030 m, at a flow rate of 0.3–0.9 m /s, with water temperatures ca 8°C.

Distribution. Known only from the type locality – Bogdo-Ula Range of Tien Shan Mountains (Xinjiang Uygur Autonomous Region, China) ( Fig. 30View FIGURES 28–31).