Homoneura (Homoneura) bicolorata, 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 : 405-410

Homoneura (Homoneura) bicolorata sp. nov.

( Figs 13−18 , 19−23 )

Description. MALE. Body length 6.9 mm, wing length 6.2 mm.

Head ( Figs 14−15 ) yellow. Ocelli brownish red; ocellar setae, anterior fronto-orbital setae and posterior frontoorbital setae incomplete. Parafacial yellow with a row of short setulae on vental half of inner margin. Gena about 1/6 height of eye. Antenna yellow, 1st flagellomere about 2.3 times longer than high; arista blackish brown, with longest ray as long as height of 1st flagellomere. Proboscis and palpus yellow.

Thorax ( Fig. 16 ) yellow. Postpronotum yellow. Mesonotum with 0+3 dorsocentral setae (1st post–sutural dorsocentral setae behind the transversal suture), acrostichal setulae in irregular 8 rows. Legs mostly yellow, all tarsomeres 3–5 pale brown at apex. Fore femur with 6 posterodorsal setae, 4 posteroventral setae and ctenidium with 17–19 short setae; fore tibia with 1 long preapical anterodorsal seta 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. 18 ) pale yellow, brown apical spots on R 2+3, R 4+5 and M 1 entirely separated; basal edge of brown apical spot on R 2+3 distinctly behind vertical level of spot on R 4+5 and M 1, basal edge of apical spot on R 4+5 behind vertical level of spot on M 1; one round spot on R 4+5 situated at middle point of distance between crossveins r-m and dm-cu; brown cloud on crossvein dm-cu, constricted at middle; subcostal cell 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 3.4:1.4:1; r-m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1:1.6; ultimate sections of CuA 1 about 1/8. Halter pale yellow.

Abdomen ( Fig. 13 ) yellow. Male genitalia ( Figs 17 , 19−23 ): syntergosternite 7+8 circular, a seta dorsal to spiracle; epandrium broad in lateral view; surstylus light color and narrow at base while dark yellow and broad at apex, nearly trapeziform with two long setulae in lateral view; hypandrium reverse U-shaped; pregonite round apically in venral view, postgonite hook-like in lateral view; phallus slender in ventral view and broad in lateral view; phallapodeme shorter than phallus.

FEMALE. Unknown.

Type Material. Holotype ♂ ( IMAU), CHINA, Shaanxi Province, Hua County, Gaotang Town, Dongyu Vil- lage, huangbiangou, 1070 m, 7. VII. 2014, Lei Zhang.

Distribution. China (Shaanxi).

Remarks. The new species is similar to Homoneura (Homoneura) zhangjiajiensis Shi & Yang, 2014 from China (Hunan), but the latter has the following features: the surstylus being narrow columnar in lateral view and being broad with tiny setulae in posterior view; the postgonites being triangular with sharp apex in lateral view.

Etymology. Latin, bi -, meaning double + colorata, meaning colorful, referring to the surstylus being light color at base and dark yellow at apex; a feminine adjective.

Figures

FIGURES 13–18. Homoneura (Homoneura) bicolorata sp. nov. Holotype male. 13. habitus, lateral view; 14–15. head, anterior and lateral view; 16. thorax, dorsal view; 17. abdominal tergites 6–9, lateral view; 18. wing.

FIGURES 19–23. Homoneura (Homoneura) bicolorata sp. nov. Holotype male genitalia. 19. syntergosternite and epandrial complex, lateral view; 20. epandrial complex, posterior view; 21. syntergosternite, anterior view; 22. phallus complex, ventral view; 23. phallus complex, lateral view. Scale bar=0.1 mm.