Antocha (Antocha) turkestanica de Meijere

Figs 7, 8, 9

Antocha turkestanica de Meijere, 1921: 107; Antocha libitina Alexander, 1960: 159 (synonym); Taphrophila afghana Nielsen, 1962: 167 (synonym).

Material examined.

China – Xinjiang U. A. R. • 7 ♂♂; Gongliu, Kuerdening; 1140 m a. s. l.; 43.2549°N, 82.8250°E; 26 Jul. 2017, J. L. Ren leg.; Cau • 1 ♂; Zhaosu, Qiongbola; 1815 m a. s. l.; 43.4399°N, 81.0098°E; 30 Jul. 2017, B. Zhang leg.; Cau • 10 ♂♂, 3 ♀♀; Wenquan, Heba; 1300 m a. s. l.; 44.9799°N, 81.0354°E; 31 Jul. 2017, J. L. Ren leg.; Cau • 3 ♂♂, 1 ♀; Yumin, 165 Regiment; 902 m a. s. l.; 46.8478°N, 86.7853°E; 2 Aug. 2017, J. L. Ren leg.; Cau • 10 ♂♂; Yumin, Tasi river; 987 m a. s. l.; 48.6602°N, 86.7895°E; 3 Aug. 2017, B. Zhang leg.; Cau • 2 ♂♂; Zhaosu, Balekesu; 1634 m a. s. l.; 43.0478°N, 81.2450°E; 24 Jul. 2024, J. L. Ren leg.; light trap; XJAU • 2 ♂♂, 1 ♀; Tekesi, Tekesi; 2037 m a. s. l.; 42.9149°N, 82.1894°E; 27 Jul. 2024, J. L. Ren leg.; light trap; XJAU • 30 ♂♂, 9 ♀♀; Gongliu, Qiaxisenlin; 1680 m a. s. l.; 43.0582°N, 82.7471°E; 27 Jul. 2024, J. L. Ren leg.; light trap; XJAU • 50 ♂♂, 23 ♀♀; Gongliu, Qiaxisenlin; 2026 m a. s. l.; 43.0590°N, 82.5981°E; 28 Jul. 2024, X. Qiao leg.; XJAU .

Diagnosis.

Body dark brown. Antenna long, reaching wing base if bent backward. Prescutum and presutural scutum with four dark-brown stripes, central stripes divided 3 / 4 posteriorly; mediotergite dark brown, without grain. Wing pale gray, without stigma; vein CuA brown, wider and darker than other veins; crossvein m-cu almost connected to M fork. Tergite 9 with Y-shaped depression at middle, divided into two lobes, posterolateral margin with round projection; outer gonostylus strongly curved, base yellow, distal 2 / 3 blackened, apex slightly bifid. Aedeagus apically bifid; inner branch of paramere dark brown, base darker; interbase a narrow, apically blunt lobe.

Description.

Male. Body length 6.11–6.38 mm, wing length 6.57–6.89 mm, antenna length 0.83–0.99 mm (N = 115).

Head (Fig. 7 a, b). Mostly brown. Vertex dark brown. Antenna light brown, 16 - segmented, reaching wing base if bent backward; scape cylindrical; pedicel narrower at base, brown distal margin; flagellomeres oval, distal segments elongated cylindrical, with erect sparse setae and pale tips (Fig. 7 a, b).

Thorax (Fig. 7 a, c). Mostly brown. Pronotum brown, large dark-brown spot in middle. Prescutum and presutural scutum brown, with four dark brown stripes; central stripes divided 3 / 4 posteriorly, with pale-brown seam; mediotergite dark brown, without grain. Postsutural scutum brown, middle and posterior margin lighter in color. Scutellum brown with dark-brown lateral margin. Mediotergite dark brown (Fig. 7 c). Legs with fore-coxae dark brown; mid-coxae and hind-coxae lighter; trochanters pale brown; femora pale brown, slightly swollen distally; tibiae pale brown, brown apices; tarsi brown, pale brown at base of first tarsi (Fig. 7 a, e). Wing pale gray, without stigma; vein CuA brown, wider and darker than other veins; crossvein m-cu almost connected to M fork (Fig. 7 d). Halter pale brown, subhyaline; knob pale brown (Fig. 7 a).

Abdomen (Fig. 7 a). Mostly brown. Sternites 7–8 with dark brown stripe in middle. Abdominal setae black.

Hypopygium (Figs 6, 7e). Mostly brown. Tergite 9 with Y-shaped depression at middle, divided into two lobes, posterior margin with round projection on each side (Fig. 8 a). Gonocoxite cylindrical, inner margin concave (Fig. 8). Outer gonostylus strongly curved, base yellow, distal 2 / 3 blackened, apex slightly bifid. Inner gonostylus fleshy, slightly broader than outer gonostylus, with sparse, yellow setae, blunt apex. Aedeagal complex with parameres fused apically, forming flattened arch, base of paramere clover-shaped, with a gradual taper at apex (Figs 7 f, 8 a). Inner branch of paramere gradually tapering from the middle to the apex, dark brown, base darker. Interbase a narrow, elongated, apically acute lobe. Aedeagus bifid at apex.

Female. Body length 6.86–7.89 mm, wing length 7.94–8.61 mm, antenna length 1.24–1.33 mm (N = 37). Resembles male in head and wing.

Ovipositor (Fig. 7 g). Tergite 10 yellow, with brown spot. Cercus long, narrow, apex slightly raised and tapering. Hypogynial valvae, straight, yellow, reaching about 2 / 3 of cercus.

Elevation range in China.

Adults were collected at altitudes ranging from 900 m to 2100 m.

Period of activity.

Adults were collected in July and August.

Biology.

The adults of this species exhibit phototaxis and gregarious behavior (Fig. 9). They typically inhabit areas near flowing streams and rest on rocks adjacent to the water surface during the daytime.

Distribution.

Afghanistan, China (Xinjiang: Yumin, Gongliu, Tekesi, Wenquan, Yumin, Zhaosu), Kazakhstan, Tajikistan, Turkmenistan.

Remark.

This is the first report of this species from China.