Homoneura (Homoneura) longicurva, Gao & Shi, 2019

Gao, Xuefeng & Shi, Li, 2019, Nine new species of genus Homoneura from Qinling mountains in China (Diptera: Lauxaniidae), Zootaxa 4608 (3), pp. 401-432 : 416

Homoneura (Homoneura) longicurva sp. nov.

( Figs 46−51 , 52−56 )

Description. MALE. Body length 5.1 mm, wing length 4.6 mm.

Head ( Figs 47−48 ) yellow. Frons with a pair of brown stripes extending to ocellar triangle; ocellar setae, anterior and posterior fronto-orbital setae broken. Parafacial yellow with a row of black short setulae on apical half of inner margin. Gena about 1/9 height of eye. Antenna yellow, 1st flagellomere about 2 times longer than high; arista blackish brown, pubescent, with longest ray as long as 4/5 height of 1st flagellomere. Proboscis and palpus yellow.

Thorax ( Fig. 49 ) yellow. Mesonotum with 0+3 dorsocentral setae (1st post–sutural dorsocentral setae behind the transversal suture), acrostichal setulae in irregular 6 rows. Legs mostly yellow, all tarsomeres 3–5 brown. Fore femur with 5 posterodorsal setae, 4 posteroventral setae and ctenidium with 7–9 short setae; fore tibia with 1 long preapical anterodorsal setae and 1 short apicoventral seta. Mid femur with 5 anterior setae and 1 short apicoposterior seta; mid tibia with 1 strong preapical anterodorsal seta and 3 strong apicoventral setae. Hind femur with 1 preapical anterodorsal seta; hind tibia with 1 long preapical anterodorsal seta and 1 short apicoventral seta. Wing ( Fig. 51 ) pale yellow, brown apical spots on R 2+3, R 4+5, M 1 separated each other; a brown median spot on R 4+5 slightly contacted with upper margin of brown cloud on crossvein dm-cu; subcostal cell pale brown; 2nd (between R 1 and R 2+3), 3rd (between R 2+3 and R 4+5) and 4th (between R 4+5 and M 1) sections in proportion of 4.8:1.4:1; r-m at middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1:1.5; ultimate sections of CuA 1 about 1/7. Halter pale yellow.

Abdomen ( Figs 46, 50 ) yellow. Male genitalia ( Figs 50 , 52−56 ): syntergosternite 7+8 circular with a ventral process; epandrium broad in lateral view, surstylus long knife-like with several setulae in lateral view; hypandrium nearly H-shaped and hypandrial apodeme tiny; pregonite with two sharp distal processes; postgonite slightly curved apically in lateral view; phallus with a pair of sharp median processes and a pair of lateral processes subapically in ventral view; phallapodeme longer than phallus.

FEMALE. Body length 5.0– 5.3 mm, 4.6–4.7 mm.

Type material. CHINA, Shaanxi Province: Holotype ♂ ( IMAU), Foping County, Yueba, Heilongtan , 27. VIII. 2014, Xiumei Lu . Paratypes ( IMAU): 2♀♀, Hua County, Gaotang Town, Dongyu Village , Huangbiangou , 1070 m, 7. VII. 2014, Lei Zhang .

Distribution. China (Shaanxi).

Remarks. The new species is similar to Homoneura (Homoneura) serrata Gao & Yang, 2002 from China (Guangxi and Guizhou), but the latter has the following features: the wing having subcostal cell hyaline at apex, a brown median spot being present on R 4+5 before the vertical level of brown cloud on crossvein dm-cu, and the surstylus being without curving upward apically.

Etymology. Latin, longi -, meaning long + curva, meaning curve, referring to the surstylus being long and curved apically; a feminine adjective.

Figures

FIGURES 46–51. Homoneura (Homoneura) longicurva sp. nov. Holotype male. 46. habitus, lateral view; 47–48. head, anterior and lateral view; 49. thorax, dorsal view; 50. abdominal tergites 4–9, lateral view; 51. wing.

FIGURES 52–56. Homoneura (Homoneura) longicurva sp. nov. Holotype male genitalia. 52. syntergosternite and epandrial complex, lateral view; 53. epandrial complex, posterior view; 54. syntergosternite, anterior view; 55. phallus complex, ventral view; 56. phallus complex, lateral view. Scale bar=0.1 mm.