Neurigona huanglianshana, Lin & Wang & Yang, 2024

Lin, Chen, Wang, Mengqing & Yang, Ding, 2024, The genus Neurigona Rondani, 1856 (Diptera, Dolichopodidae) from Yunnan, China, with descriptions of seven new species and a key to the species of China, ZooKeys 1190, pp. 319-345 : 319

Neurigona huanglianshana sp. nov.

Figs 5 , 8

Type material.

Holotype: ♂, China: Yunnan, Lvchun, Yakou, Shuikuxiafang, (23°3'25.2"N, 102°46'37.71"E), 1780 m, collected by Malaise trap, 2019.IV.19-V.19, Liang Wang and Xin Li (CAU).

Diagnosis.

Mesonotum with brown subtriangular spot at middle posterior region; scutellum dark brownish yellow with dark yellow posterior margin; postnotum dark brown with dark yellow anterior margin. First flagellomere somewhat oval. Hind tarsomere 1 with cluster of short, erect, and fine ventral bristles basally, three pv on apical 1/3, and two apical bristles. Ventral surstylus apically strongly bent, with bifurcated tip; dorsal surstylus wider than ventral surstylus, nearly quadrate, apically with one knife-like dorsal process.

Description.

Male (Fig. 5A ). Body length 3.0 mm, wing length 3.5 mm.

Head metallic green with gray pollinosity; eyes very narrowly separated on middle portion of face. Hairs and bristles on head black, but postocular bristles and postero-ventral hairs pale yellow. Antenna (Fig. 8E ) yellow except first flagellomere dark yellow; first flagellomere somewhat oval, almost as long as wide, somewhat round apically, with dense brownish pubescence; arista subapical, dark brown with dark brownish yellow base. Proboscis yellow with pale bristles and hairs; palpus yellow with two strong black apical bristles.

Thorax yellow with fine pale yellow pollinosity; mesonotum with brown subtriangular spot at middle posterior region; scutellum dark brownish yellow with dark yellow posterior margin; postnotum dark brown with dark yellow anterior margin; laterotergite with blackish stripe at anterior margin and dark brown inner portion. Pteropleuron below wing base with a small black spot. Hairs and bristles on thorax black, six or seven strong dc, 10-12 irregularly paired acr short hair-like; scutellum with two pairs of bristles, lateral pair long and strong, median pair short and hair-like. Propleuron with one yellow bristle on lower portion.

Legs yellow except fore tarsus dark yellow with tarsomere 5 brown and mid and hind tarsi brownish yellow. Hairs and bristles on legs mostly black except hairs on fore coxa brownish yellow to brown. Fore coxa with four long thick brownish yellow bristles on antero-apical portion; mid coxa with three brownish yellow anterior and apical bristles; hind coxa with one strong black outer bristle at basal 1/3. Mid tibia with one ad, one pd, and two short or long apical bristles. Hind tibia with three ad, two pd, two apical ventral bristles, and one row of brownish yellow comb-like bristles. Mid tarsomere 1 with one short and one long dorsal bristles at base. Hind tarsomere 1 with cluster of short erect and fine ventral bristles basally, three pv on apical 1/3, and two apical bristles. Relative lengths of tibiae and five tarsomeres of legs - LI 11.3: 8.0: 5.0: 3.3:1.9: 1.0; LII 13.4: 14.1: 3.7: 2.9:1.6: 2.4; LIII 20.6: 5.9: 6.3: 3.8: 2.7: 1.2.

Wing nearly hyaline, tinged brown; veins brown, M1+2 distinctly bent, somewhat geniculate, greater than 90 degrees; CuAx ratio 0.49. Squama yellow with yellow hairs. Halter yellow, but base of knob brown with cluster of black hairs.

Abdomen yellow with pale yellow pollen; terga 2-4 each with dark brown basal spot; abdominal sternum 5 distinctly projected, long and subtriangular (Fig. 9C ). Hairs and bristles on abdomen black except those on venter more or less yellow.

Male genitalia (Fig. 5B ): epandrium almost as long as wide, with two lateral processes (one extremely long and thin; the other long, somewhat wide, apically furcated). Ventral surstylus apically strongly bent, with bifurcated tip; dorsal surstylus wider than ventral surstylus, nearly quadrate, apically with one knife-like dorsal process. Cercus round with long dense yellow hairs, with long finger-like apical process. Hypandrium long and narrow. Phallus long and thin.

Female. Unknown.

Distribution.

China (Yunnan).

Etymology.

The species is named after the type locality Huanglianshan.

Remarks.

This species is somewhat similar to N. henana Wang, Yang & Grootaert, 2007 from Henan of China, but may be separated from the latter by the arista subapical and mesonotum with one brown subtriangular spot at middle posterior region. In N. henana , the arista is dorsal, and the mesonotum is wholly yellow ( Wang et al. 2007; Yang et al. 2011).

Figures

Figure 5. Neurigona huanglianshana sp. nov. A male habitus, lateral view B genitalia, lateral view. Scale bars: 1 mm (A); 0.1 mm (B).

Figure 8. Antennae A Neurigona apicilata sp. nov. B Neurigona basicurva sp. nov. C Neurigona brevidigitata sp. nov. D Neurigona convexa sp. nov. E Neurigona huanglianshana sp. nov. F Neurigona quadrimaculata sp. nov. G Neurigona ventriprocessa sp. nov. Scale bars: 0.1 mm.

Figure 9. Abdominal sternite 5 (male) A Neurigona basicurva sp. nov. B Neurigona convexa sp. nov. C Neurigona huanglianshana sp. nov. D Neurigona ventriprocessa sp. nov.