Homoneura (Homoneura) anadaequata, 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

Homoneura (Homoneura) anadaequata sp. nov.

( Figs 1−7 , 8−12 )

Description. MALE. Body length 6.9−7.5 mm, wing length 6.3−7.0 mm.

Head ( Figs 2−3 ) yellow. Frons as long as wide and parallel–sided, with a pair of pale brown stripes extending to ocellar triangle; ocellar setae longer than anterior fronto-orbital setae. Face with a dark yellow transverse band on ventral margin and dark yellow on inner margin. Gena about 1/8 height of eye. Antenna yellow; 1st flagellomere yellowish brown, about 2.3 times longer than high; arista brown except for yellow base, with longest ray about 1.1 times as long as height of 1st flagellomere. Proboscis pale yellow and palpus yellow.

Thorax ( Fig. 4 ) yellow. Mesonotum with 3 dorsocentral setae (1st post-sutural dorsocentral seta behind the transversal suture), acrostichal setulae in irregular 10 rows, a pair of prescutellar setae about 1.6 times as long as 1st dorsocentral setae. Legs mostly yellow, all tarsomeres 3−5 pale brown at apex. Fore femur with 8 posterodorsal setae, 4 posteroventral setae and ctenidium with 17 short setae; fore tibia with 1 long preapical anterodorsal seta and 1 short apicoventral seta. Mid femur with 4 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 long apicoventral seta. Wing ( Fig. 7 ) pale yellow, with brown elliptical apical spots on R 2+3, R 4+5 and M 1, basal margin of apical spot on R 2+3 slightly beyond the vertical level of crossvein dm-cu; a small brown oval median spot between crossveins r-m and dm-cu; brown cloud on crossvein dm-cu getting narrow at middle; subcostal cell pale yellow; 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 6.2:1.5:1; r-m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1:2; ultimate section of CuA 1 about 1/9 of penultimate. Halter yellow.

Abdomen ( Figs 5−6 ) yellow, male tergites 2−5 each with brown posterior margin. Male genitalia ( Figs 8−12 ): syntergosternite 7+8 circular with a broad ventral process; epandrium slender, surstylus long and furcated; hypandrium nearly H-shaped; postgonites asymmetrical; phallus slender with a pair of brown sharp triangle apical processes in ventral view; phallapodeme project forward and almost 90 degrees angle with phallus.

FEMALE. Body length 6.7–7.7 mm, wing length 6.3–7.0 mm.

Type material. CHINA, Shanxi Province: Holotype ♂ ( IMAU), Foping County, Daguping, 1366.2 m, 22.VIII. 2014, Xiumei Lu . Paratypes ( IMAU): 9♂♂, data same as holotype ; 4♂♂, Foping County, Daguping, 1329.2 m, 24. VIII. 2014, Xiumei Lu ; 2♀♀, Zhouzhi County, Mt. Taibai, 1565 m, 13.VIII. 2013, Wei Zhang ; 28♀♀, Foping County, Daguping, 1366.2 m, 22.VIII. 2014, Xiumei Lu ; 5♀♀, Zhouzhi County, Mt. Taibai, 1565 m, 13.VIII.2013, Xuankun Li .

Distribution. China (Shaanxi).

Remarks. The new species is similar to Homoneura (Homoneura) brevis Gao & Yang, 2004 from China (Guangxi), but the latter has the following features: the mesonotum having acrostichal setulae in 8 rows, the ctenidium having 14 short setae on fore femur and the surstylus having a small acute teeth-like process in lateral view.

Etymology. Latin, an -, meaning no + adaequata, meaning symmetrical, referring to the postgonites asymmetrical in ventral view; a feminine adjective.

Figures

FIGURES 1–7. Homoneura (Homoneura) anadaequata sp. nov. Paratype male. 1. habitus, lateral view; 2–3. head, anterior and lateral view; 4. thorax, dorsal view; 5–6. abdomen, dorsal and lateral view; 7. wing.

FIGURES 8–12. Homoneura (Homoneura) anadaequata sp. nov. Paratype male genitalia. 8. epandrial complex, lateral view; 9. epandrial complex, posterior view; 10. syntergosternite, anterior view; 11. phallus complex, ventral view; 12. phallus complex, lateral view. Scale bar=0.1 mm.