Homoneura (Homoneura) xunyangensis Gao & Shi, 2019

Zhang, Mengjing, Gao, Xuefeng & Shi, Li, 2019, Three new species of genus Homoneura from Qinling Mountains, China (Diptera: Lauxaniidae), Zoological Systematics 44 (2), pp. 146-157 : 150-153

Homoneura (Homoneura) xunyangensis Gao & Shi sp. nov. ( Figs 12−21 )

Type material. Holotype ♂ ( IMAU), CHINA, Shaanxi, Xunyang County, Zhima Village , 695 m, 2.VIII.2014, anonym.

Diagnosis The new species is similar to H. (H.) laticosta (Thomson, 1869) , but the latter has the following features: crossvein r-m without brown spots, surstylus without furcated apex in posterior view. This species is also similar to H. (H.) lagena Sasakawa & Ikeuchi, 1983 , but the latter has the following features: palpus blackish brown and male sternite 6 with 12−13 black spines on posterior margin.

Description. Male. Body length 5.2 mm, wing length 4.4 mm.

Head ( Figs 13−14 ) yellow. Frons with brown anterior margin; anterior fronto-orbital setae, posterior fronto-orbital setae and ocellar setae missing. Parafacial yellow with a row of short setulae along apical half of inner margin. Gena about 1/7 height of eye. Antenna yellow, 1st flagellomere 2 times longer than high; arista blackish brown, short plumose, with longest ray as long as 1/2 height of 1st flagellomere. Proboscis and palpus yellow.

Thorax ( Figs 12, 15 ) yellow. Postpronotum pale yellow. Mesonotum with 0+3 dorsocentral setae (1st postsutural dorsocentral seta far away from transverse suture), acrostichal setae in irregular 6 rows. Anepisternum and katepisternum brown. Legs mostly yellow, all tarsomeres 3–5 brown. Fore femur with 5 posterior dorsal setae, 3 posterior ventral setae and ctenidium with 11 short setae; fore tibia with 1 long preapical anterior dorsal seta and 1 short apicoventral seta. Mid femur with 7 anterior setae and 1 short apical posterior seta; mid tibia with 1 strong preapical anterior dorsal seta and 2 strong apicoventral setae. Hind femur with 1 preapical anterior dorsal seta and 4 anteroverntral setae; hind tibia with 1 long preapical anterior dorsal seta and 1 short apicoventral seta. Wing ( Fig. 16 ) yellow, with brown area extending from costal margin to tip of R 4+5; two brown cloudy spots on r-m and dm-cu, respectively; subcostal cell hyaline; costa with 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; crossvein 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 yellow ( Fig. 12 ). Male genitalia ( Figs 17−21 ): syntergosternite 7+8 semicircular; epandrium broad in lateral view, with a claviform process on anteroventral corner; surstylus with two sharp processes in lateral view and blackish brown connection area with epandrium; hypandrium H–shaped; pregonite with two sharp processes, postgonite triangular with sharp apex; phallus with double concavities in ventral view and sharp at apex in lateral view; phallic apodeme Y-shaped.

Distribution. China (Shaanxi).

Etymology. The new species is named after the collecting locality Xunyang.

Figures

Figures 12–16. Homoneura (Homoneura) xunyangensis Gao & Shi sp. nov., paratype, male. 12. Habitus, lateral view. 13–14. Head, anterior and lateral view. 15. Thorax, dorsal view. 16. Wing.

Figures 17–21. Homoneura (Homoneura) xunyangensis Gao & Shi sp. nov., paratype, male genitalia. 17. Syntergosternite and epandrial complex, lateral view. 18. Epandrial complex, posterior view. 19. Syntergosternite, anterior view. 20. Phallus complex, ventral view. 21. Phallus complex, lateral view. Scale bar=0.1mm.