Homoneura (Homoneura) platimarginata, 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 : 417-424

Homoneura (Homoneura) platimarginata sp. nov.

( Figs 68−73 , 74−78 )

Description. MALE. Body length 6.3 mm, wing length 5.7 mm.

Head ( Figs 69−70 ) yellow. Ocellar setae longer than anterior fronto-orbital setae. Parafacial yellow with a row of black short setulae on apical half of inner margin. Gena about 1/7 height of eye. Antenna yellow, 1st flagellomere about 1.9 times longer than high; arista blackish brown, with longest ray as long as 3/5 height of 1st flagellomere. Proboscis and palpus yellow.

Thorax ( Fig. 71 ) 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 14 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. 73 ) pale yellow, brown apical spots on R 2+3, R 4+5 and M 1 separated from each other; a brown median spot on R 4+5 separated from upper margin of a brown stripe on crossvein dm-cu; 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 5.6:1.5:1; r-m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1:1.5; ultimate sections of CuA 1 about 1/9. Halter pale yellow.

Abdomen ( Fig. 68 ) yellow. Male genitalia ( Figs 72 , 74−78 ): syntergosternite 7+8 elliptic; epandrium slightly broad, surstylus broad and margined apically in lateral view; hypandrium H-shaped; pregonite and postgonite sharp at apex in lateral view; phallus with sharp dorsal and lateral processes in lateral view; phallapodeme longer than phallus.

FEMALE. Body length 6.0– 6.3 mm, wing length 5.5–5.7 mm.

Type material. CHINA, Shaanxi Province: Holotype ♂ ( IMAU), Foping County, Yunba, Heilongtan , 27. VIII. 2014, Xiu-mei Lu . Paratypes ( IMAU): 1♀, Liuba County, Mt. Guanghua , 1912 m, 20. VIII. 2013, Yuqiang Xi ; 4♀♀, Foping County, Daguping , 1366.2 m, 22. VIII. 2014, Xiumei Lu .

Distribution. China (Shaanxi).

Remarks. The new species is similar to Homoneura (Homoneura) guizhouensis Gao & Yang, 2002 from China (Guizhou), but the latter has the following features: a brown median spot being present on R 4+5 fused with upper margin of brown spot on dm-cu, the gonites lacking a furcation in lateral view, and the phallus having deep incision subapically in lateral view.

Etymology. Latin, plati -, meaning broad + marginata, meaning margined, referring to the surstylus broad and margined apically in lateral view; a feminine adjective.

Figures

FIGURES 68–73. Homoneura (Homoneura) platimarginata sp. nov. Holotype male. 68. habitus, lateral view; 69–70. head, anterior and lateral view; 71. thorax, dorsal view; 72. abdominal tergites 6–9, lateral view; 73. wing.

FIGURES 74–78. Homoneura (Homoneura) platimarginata sp. nov. Holotype male genitalia. 74. syntergosternite and epandrial complex, lateral view; 75. epandrial complex, posterior view; 76. syntergosternite, anterior view; 77. phallus complex, ventral view; 78. phallus complex, lateral view. Scale bar=0.1 mm.