Antocha ( Antocha ) chonsaniana Podenas, 2015

Qiao, Xue, Wang, Xue, Yang, Ding & Ren, Jinlong, 2025, New records and a new species of the subgenus Antocha (Antocha) Osten Sacken, 1860 (Diptera, Limoniidae) from Northwest China, ZooKeys 1256, pp. 179-194 : 179-194

Antocha ( Antocha) chonsaniana Podenas

Figs 5 , 6

Antocha ( Antocha) chonsaniana Podenas, 2015: 3 .

Material examined.

China – Gansu Prov. • 25 ♂♂; Tianshui, Zhangjialinchang ; 1339 m a. s. l.; 34.6800°N, 106.3300°E; 13 Jul. 2017, Qilemoge leg.; CAU • 22 ♂♂, 2 ♀♀; Tianshui, Zhangjialinchang ; 1339 m a. s. l.; 34.6800°N, 106.3300°E; 13 Jul. 2017, J. L. Zhou leg.; Cau . – Shaanxi Prov. • 2 ♂♂, 1 ♀; Yangxian, Maopingzhen, Shaojiagou ; 911 m a. s. l.; 33.4288°N, 107.6789°E; 8 Aug. 2017, X. L. Chen leg.; CAU .

Diagnosis.

Body brown. Antenna short, reaching base of prescutum if bent backward. Prescutum and presutural scutum with three darker brown stripes on brown background. Wing grayish brown; stigma slightly darker, barely noticeable; crossvein m-cu before M fork, distance about 1 / 4 its length. Tergite 9 with posterior margin having shallow depression at middle; outer gonostylus strongly sclerotised, wide at base, narrowed to blunt apex. Aedeagus sword-shaped, blunt at apex. Inner branch of paramere elongated, blackened and blunt at apex. Interbase a narrow, elongated, apically acute lobe. Ovipositor with long, narrow cercus, apex raised, tapering; hypogynial valvae long, straight, reaching half cercus.

Description.

Male. Body length 4.39–4.87 mm, wing length 4.54–4.79 mm, antenna length 0.86–1.16 mm ( N = 49).

Head (Fig. 5 a, b ). Mostly pale brown. Vertex brown. Antenna pale brown, 16 - segmented, reaching base if bent backward; scape cylindrical; pedicel narrower at base, distal margin brown; flagellomeres oval, distal segments elongated, cylindrical, with erect, sparse setae (Fig. 5 a, b ).

Thorax (Fig. 5 a, c ). Mostly brown. Pronotum brown, with large dark brown spot in middle. Prescutum and presutural scutum brown, with three dark-brown stripes. Postsutural scutum brown, scutal lobes each with blunt, square, dark spots on anterior middle. Scutellum brown, with black lateral margin. Mediotergite brown, dark-brown marking at upper-anterior corners, with pale-brown stripes on the upper side of these markings (Fig. 5 c ). Legs with fore-coxae pale brown; mid-coxae and hind-coxae lighter; trochanters pale brown with brown margins; femora pale brown, slightly swollen distally; tibiae brown, brown apices; tarsi brown, pale brown at base of first tarsi (Fig. 5 a, e ). Wing grayish brown; stigma slightly darker, barely noticeable; R 1, CuA 1 and A 2 brown; crossvein m-cu before M fork, distance about 1 / 4 its length (Fig. 5 d ). Halter pale brown, subhyaline; knob pale brown (Fig. 5 a ).

Abdomen (Fig. 5 a ). Mostly pale brown. Sternites 7–8 with brown stripe in middle. Abdominal setae brownish.

Hypopygium (Figs 5 f , 6 ). Mostly brown. Tergite 9 with dark-brown stripes in middle, shallow depression at mid-posterior margin (Fig. 6 a ). Gonocoxite cylindrical, inner margin concave (Fig. 6 ). Outer gonostylus strongly sclerotized, wide at base, narrowed to blunt apex, bent inward. Inner gonostylus fleshy, slightly broader than outer gonostylus, covered with sparse, yellow setae; apex blunt. Aedeagal complex with parameres fused apically, base of paramere elongated, extending laterally with a gradual taper at apex (Figs 5 f , 6 a ). Inner branch of paramere elongated, blackened and blunt at apex. Interbase a narrow, elongated, apically acute lobe. Aedeagus sword-shaped, blunt at apex.

Female. Body length 5.29–6.05 mm, wing length 5.37–5.61 mm, antenna length 0.84–1.24 mm ( N = 3). Resembles male in head and wing.

Ovipositor (Fig. 5 g ). Tergite 10 yellow, with brown spot. Cercus long, narrow, apex slightly raised and tapering. Hypogynial valve, straight, yellow, reaching about 1 / 2 of cercus.

Elevation range in China.

Adults were collected at altitudes ranging from 900 m to 1400 m.

Period of activity.

Adults were collected in July and August.

Distribution.

China ( Gansu: Tianshui; Shaanxi: Yangxian), North Korea.

Remark.

This is the first report of this species from China.

Figures

Figure 5. Antocha (Antocha) chonsaniana. A. Habitus of male, lateral view; B. Male head, lateral view; C. Male thorax, dorsal view; D. Right wing; E. Male leg, lateral view; F. Aedeagal complex, dorsal view; G. Female ovipositor, lateral view. Scale bars: 1.0 mm (A, E); 0.5 mm (D); 0.2 mm (B, C, G); 0.05 mm (F).

Figure 6. Antocha (Antocha) chonsaniana. A. Male hypopygium, dorsal view; B. Male hypopygium, ventral view. Scale bar: 0.1 mm.