Hybos wuyishanus, Li & Yang, 2023

Li, Meilin & Yang, Ding, 2023, New species and records of the genus Hybos Meigen (Diptera, Empidoidea, Hybotinae) from Wuyishan National Park, China, ZooKeys 1172, pp. 313-351 : 313

Hybos wuyishanus sp. nov.

Fig. 25

Type material examined.

Holotype: China •♂; Fujian, Wuyishan, Yangjiashan; 1,044 m, 10-17 May 2021; Lingfei Peng (Malaise trap); CAU.

Diagnosis.

First flagellomere much elongated, arista long and bare. Legs mostly blackish. Hind tibia with one row of short thin ad and pd. Hypandrium wide at middle, apical margin nearly truncate, with one small process at apical 1/3.

Description.

Male. Body length 3.8 mm, wing length 3.7 mm.

Head black with gray pilosity. Eyes contiguous on frons, blackish brown with indistinctly enlarged dorsal facets brownish. Hairs and bristles on head blackish except postero-ventral surface with partly brown hairs; ocellar tubercle indistinct with two oc and two short posterior hairs. Antenna blackish; scape without hairs, pedicel with circlet of blackish brown subapical hairs; first flagellomere blackish brown, much elongated, longer than scape and pedicel combined, without dorsal hairs; arista blackish brown, long and bare except apical ~ 1/5 thin. Proboscis shorter than head, blackish brown. Palpus dark brown, with four or five dark brown ventral hairs.

Thorax black with gray pilosity. Hairs on thorax blackish, bristles black; hairs on mesonotum short, ppn absent, two npl (anterior npl weak), uniserial hair-like dc nearly as long as irregularly biserial acr, one prsc, one psa; scutellum with two long sc. Legs mostly blackish, except mid coxa dark brown; hind coxa, femur, and tibia black; all knee brownish yellow; all extreme tip of femur and extreme base of tibiae brownish yellow. Hairs on legs mostly brown to blackish brown, bristles blackish to black, but those on coxae partly brownish yellow; fore femur with dark brown bristles; hind femur and tibia with partly brownish hairs. Fore femur 1.1 × and hind femur 2.5 × as wide as mid femur. Fore femur with one row of weak pv shorter than femur thickness. Mid femur with three or four ad on apical 1/3, one row of pv (middle pv long, longer than femur thickness). Hind femur with two rows of v, five long av on tubercles and one row of very short spine-like pv on distinct tubercles, apical pv dense and with some very long outer pv hairs. Fore tibia with one long strong preapical ad. Mid tibia with two long strong ad on apical 1/2, one long pv at middle; apically with five bristles including one long preapical pv. Hind tibia with one row of short thin ad and pd. Mid tarsomere 1 with one preapical av. Hind tarsomere 1 with one row of short dense spine-like ventral bristles. Wing hyaline, stigma brown; veins dark brown, R4+5 and M1 divergent apically. Squama dark yellow with dark yellow hairs. Halter dark yellow with yellow knob.

Abdomen long narrow, nearly straight, blackish with pale gray pilosity. Hairs and bristles on abdomen brownish yellow to dark brown. Hypopygium nearly as thick as pregenital segments.

Male genitalia. Left epandrial lamella slightly narrower than right epandrial lamella, with convex inner margin near middle (Fig. 25b ); left surstylus curved, narrowing toward tip (Fig. 25d ). Right epandrial lamella with slightly concave inner margin; right surstylus wide with shallow apical incision (Fig. 25c ). Hypandrium ~ 1.9 × longer than wide, wide at middle, apical margin nearly truncate, with one small process at apical 1/3 (Fig. 25e ).

Female. Unknown.

Etymology.

This specific name refers to the type locality Wuyishan.

Distribution.

China (Fujian).

Remarks.

The new species is similar to H. dazhulanus sp. nov., but may be separated from the latter by the hind tibia with one row of short thin ad and pd and hypandrium with apical margin nearly truncate. In H. dazhulanus sp. nov., the hind tibia has one very long thin pd apically, and the hypandrium has an incision at apical margin.

Figures

Figure 25. Hybos wuyishanus sp. nov. a male habitus, lateral view b genitalia, dorsal view c right surstylus d left surstylus e hypandrium, ventral view.