Campsicnemus pallidoapicalis Wang, Przhiboro & Yang, 2016

Wang, Mengqing, Liu, Ruosi, Przhiboro, Andrey & Yang, Ding, 2016, New species of Dolichopodidae from eastern Mongolia (Diptera), Zoological Systematics 41 (1), pp. 102-108 : 103-105

Campsicnemus pallidoapicalis Wang, Przhiboro & Yang , sp. nov. ( Figs 3–4 , 10 , 13 )

Male. Body length 2.4–2.5 mm, wing length 2.5–2.6 mm ( Fig. 3 ).

Head metallic-green with grey pollen; face narrow in middle part, with brown pollen at lower portion. Head with hairs and bristles black. Lower postocular bristles (including ventral hairs) pale. Antenna yellow with first flagellomere black; first flagellomere with round apex, about 1.5 times as long as wide; arista dorsal, dark brown, but pale yellow in apical 1/3 portion ( Fig. 4 ). Proboscis brown, with black hairs; palpus yellow, with black hairs.

Thorax metallic-green with pale grey pollen; mesonotum and scutellum with grey brown pollen. Thorax with hairs and bristles black; 5 dc (first pair rather short), acr uniseriate 3–4; scutellum with apical pair of bristles distinct, basal pair indistinct and 2–3 pale yellow marginal hairs between apical pair bristles. Propleuron with pale hairs on upper portion and 1 black bristle on lower portion.

Legs yellow; fore coxa yellow, mid and hind coxae black; all femora and tibiae yellow; all tarsi with tarsomeres 2–5 brown to dark brown outward. All legs simple (not distinctly curved or swollen, without projections).

Hairs and bristles on legs black; fore coxa with pale yellow hairs and black apical bristles; mid coxa with pale yellow anterior hairs, black apical bristles and one black outer bristle; hind coxa with black apical bristles and one black outer bristle. All femora without distinct v, each with one av apically. Fore tibia with one pd and one v in apical half, apically with one bristle; mid tibia with 3 ad, 2 pd and 1 av, apically with 3 bristles; hind tibia with 4 ad, 5–6 pd and 2 av, apically with 4 bristles. Tarsomere 1 of all legs each with two rows of short v. Relative lengths of tibia and five tarsomeres of legs as follows: LI 3.2: 1.5: 0.7: 0.5: 0.4: 0.4; LII 4.4: 1.8: 0.7: 0.5: 0.4: 0.4; LIII 5.4: 1.4: 1.2: 0.8: 0.5: 0.5. Wing somewhat hyaline; veins dark brown, R 4+5 and M parallel apically; CuAx ratio 0.40. Squama yellow with brown hairs. Halter yellow.

Abdomen short (ratio of thorax length to abdomen length 0.70). Metallic-green with pale grey pollen, dorsum brilliant. Hairs and bristles on abdomen black.

Male genitalia ( Fig. 10 ). Epandrium longer than wide, with angular ventral apex. Dorsal lobe of surstylus short and wide, with acute apex; ventral lobe long and wide, somewhat curved, with apical bristles and hairs. Cercus short and wide, with medium-sized bristles. Apex of phallus bifurcated.

Female. Unknown.

1, 3. Habitus. 2, 4. Antenna, lateral view. Scale bars: 1, 3 = 0.5 mm; 2, 4 = 0.1 mm.

Material examined. Holotype. ♂, Mongolia, Hentiy Aimag, 17 km ESE of Naran (45°04′30′′N, 113°53′E; elev. 1 350 m), water-logged stream and lakelet near sand dune ( Fig. 13 ), net-sweeping, 16 August 2002, coll. Andrey Przhiboro (no. 61) . Paratype. 1♂, the same data as holotype .

Distribution. Mongolia.

Etymology. The species name refers to the contrasting light coloration of the apical part of arista and is derived from the Latin words “ pallidus ” (=pale) and “ apex ”.

Remarks. The new species is similar to Ca. picticornis (Zetterstedt) in the normal leg shape and leg coloration, but can be separated from the latter by the first flagellomere with round apex and the arista dark brown but pale yellow in apical 1/3 portion. In Ca. picticornis , the first flagellomere is coniform with acute apex, and the arista entirely black.

Figures

Figure 13. Sampling site. Hentiy Aimag, 17 km ESE of Naran (45°04′30′′N, 113°53′E; elev. 1 350 m), water-logged stream and lakelet near sand dune.

Figures 1–4. Campsicnemus spp. 1–2. Ca. picticornis (Zetterstedt). 3–4. Ca. pallidoapicalis Wang, Przhiboro & Yang, sp. nov.

Figures 10–12. Male genitalia. 10. Campsicnemus pallidoapicalis Wang, Przhiboro & Yang, sp. nov., lateral view. 11–12. Chrysotus minuticapillatus Liu, Przhiboro & Yang, sp. nov. 11. lateral view. 12. Apex of phallus, ventral view. Scale bars=0.1 mm.