Homoneura (Homoneura) gaotangensis 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 : 147-150

Homoneura (Homoneura) gaotangensis Gao & Shi sp. nov. ( Figs 1−11 )

Type material. Holotype ♂ ( IMAU), CHINA, Shaanxi, Hua County, Gaotangzhen, 859 m, 8.VII.2013, Lei Zhang . Paratype. ♂ ( IMAU), same data as holotype .

Diagnosis. The new species is similar to H. (H.) separata Yang, Hu & Zhu, 2002 , but the latter has the following features: wing without brown transverse stripe on base of M 1, lower margin of dm-cu without brown extended spot, and surstylus short and broad at apex.

Description. Male. Body length 3.6−3.7 mm, wing length 3.6−3.7 mm.

Head ( Figs 2−3 ) yellow. Frons about 1.5 times longer than wide. Inner vertical seta, anterior fronto-orbital seta and posterior fronto-orbital seta missing. Parafacial yellow with a row of short setulae on apical half of inner margin. Gena about 1/9 height of eye. Antenna yellow, 1st flagellomere 2.0 times longer than high; arista blackish brown, plumose, with longest ray as long as height of 1st flagellomere. Proboscis yellow. Palpus yellow with brown apex.

Thorax ( Figs 1, 4 ) yellow. Mesonotum with a pair of brown middle stripes and a pair of brown lateral stripes, brown middle stripes extending beyond the second dorsal seta and then becoming a pale brown rectangular spot; 0+3 dorsocentral setae (1st postsutural dorsocentral seta behind transverse suture), acrostichal setae in 6 rows. Scutellum with brown median broad stripe. Legs mostly yellow, all tarsomeres 3–5 brown. Fore femur with 3 posterior dorsal setae, 2 posterior ventral setae and ctenidium with 9 short setae; fore tibia with 1 long preapical anterior dorsal seta and 1 short apicoventral seta. Mid femur with 6 anterior setae and 1 short apical posterior seta; mid tibia with 1 strong preapical anterior dorsal seta and 1 strong apicoventral seta. Hind femur with 1 preapical anterior dorsal seta and 1 anterior ventral seta; hind tibia with 1 long preapical anterior dorsal seta and 1 short apicoventral seta. Wing ( Fig. 6 ) hyaline with several brown spots: one round spot present between r-m and subapical spot on R 4+5 slightly fused with subapical spot on R 2+3, both subapical spots on R 2+3 and R 4+5 extending upward to wing margin; preapical spot on M 1 separated from subapical spot on R 4+5; crossvein r-m and dmcu surrounded by a cloudy spot; a transverse stripe on base of M 1 and brown base of CuA 1; subcostal cell pale brown; 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 3.9:1.9:1; crossvein r-m at middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1:1.9; ultimate sections of CuA 1 about 1/11. Halter pale yellow.

Abdomen ( Figs 1, 5 ) yellow. Male genitalia ( Figs 7−11 ): syntergosternite 7+8 semicircular with long arms; epandrium broad, surstylus originated from anterior ventral corner, longer in lateral view and sharp at apex in posterior view; hypandrium narrow and stripe-like, hypandrial apodeme small; postgonite slender and sharp at apex; phallus broad columniform in lateral view; phallapodeme shorter than phallus.

Female. Unknown.

Distribution. China (Shaanxi).

Etymology. The new species is named after collecting locality Gaotang.

Figures

Figures 1–6. Homoneura (Homoneura) gaotangensis Gao & Shi sp. nov., paratype, male. 1. Habitus, lateral view. 2–3. Head, anterior and lateral view. 4. Thorax, dorsal view. 5. Abdomen, lateral view. 6. Wing.

Figures 7–11. Homoneura (Homoneura) gaotangensis Gao & Shi sp. nov., paratype, male genitalia. 7. Syntergosternite and epandrial complex, lateral view. 8. Epandrial complex, posterior view. 9. Syntergosternite, anterior view. 10. Phallus complex, ventral view. 11. Phallus complex, lateral view. Scale bar=0.1mm.