Homoneura (Homoneura) similicurvata, 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 : 424

Homoneura (Homoneura) similicurvata sp. nov.

( Figs 79−86 , 87−91 )

Description. MALE. Body length 6.3–6.4 mm, wing length 6.1–6.2 mm.

Head ( Figs 80−81 ) yellow. Frons with a pair of pale brown stripes extending to ocellar triangle. Parafacial yel- low, a row of black short setulae on apical half of inner margin. Gena about 1/7 height of eye. Antenna yellow, 1st flagellomere about 1.5 times longer than high; arista blackish brown, ray as long setaceous, with longest ray as long as height of 1st flagellomere. Proboscis and palpus yellow.

Thorax ( Fig. 82 ) yellow. Mesonotum with 0+3 dorsocentral setae (1st post–sutural dorsocentral setae behind the transversal suture), acrostichal setulae in irregular 6–8 rows. Legs mostly yellow, all tarsomeres 3–5 brown. Fore femur with 6 posterodorsal setae, 4 posteroventral setae and ctenidium with 11 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. 86 ) pale yellow, with brown apical spot on R 2+3 separated from that on R 4+5, brown apical spots on R 4+5 and M 1 slightly fused each other; costa with brown narrow stripe extending closely to brown apical spot on R 2+3 between tips of R 1 and R 2+3; a brown rectangular median spot on R 4+5 slightly contacted upper margin of brown stripe on dm-cu; 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 5.4:1.3:1; 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 1/7. Halter pale yellow.

Abdomen ( Figs 83−84 ) yellow, tergites 2–5 each with black narrow posterior margin. Male genitalia ( Figs 85 , 87−91 ): syntergosternite 7+8 circular (but sternal part flat); epandrium broad, surstylus with a short bar-like pro- cess in lateral view and a subapical concavity; hypandrium nearly Y-shaped with furcation on top; pregonite short triangular while postgonite hook-like and sharp at apex; phallus with a pair of curved triangular lateral processes at middle in ventral view while phallus with a deep dorsal concavity and curved backward at apex in lateral view; phallapodeme longer than phallus.

FEMALE. Body length 6.3 mm, wing length 6.2 mm.

Type material. CHINA, Shaanxi Province: Holotype ♂ ( IMAU), Foping County, Daguping , 1366.2 m, 22. VIII. 2014, Xiumei Lu . Paratypes ( IMAU): 1♂, Xi’an City, Chang’an District, Kuyu , 897 m, 31. VII. 2013, Xu- ankun Li ; 1♀, Baoji City, Feng County, Huangniupu , light trap, 1501 m, 21. VIII. 2013, Xiumei Lu .

Distribution. China (Shaanxi).

Remarks. The new species is similar to Homoneura (Homoneura) curvata Yang, Zhu & Hu, 1999 from China (Henan), but the latter has the following features: the costal margin of wing lacking brown narrow stripe between tips of R 1 and R 2+3, the surstylus lacking concavity, and the phallus being broad and blunt at apex. The new species is also similar to Homoneura (Homoneura) hirayamae (Matsumura, 1916) from China and Japan, but the latter has the following features: a brown apical spot on R 1 becoming a narrow stripe and only extending to half of distance between R 1 and R 2+3 along costal margin, and the surstylus being claviform, and the gonites being long with short setulae.

Etymology. Latin, simil -, meaning similar + curvata , meaning curved, referring to this species being similar to the species Homoneura (Homoneura) curvata Yang, Zhu & Hu, 1999 ; a feminine adjective.

Figures

FIGURES 79–86. Homoneura (Homoneura) similicurvata sp. nov. Paratype male. 79. habitus, lateral view; 80–81. head, anterior and lateral view; 82. thorax, dorsal view; 83–84. abdomen, dorsal and lateral view; 85 abdominal terigtes 6–9, lateral view; 86. wing.

FIGURES 87–91. Homoneura (Homoneura) similicurvata sp. nov. Paratype male genitalia. 87. syntergosternite and epandrial complex, lateral view; 88. epandrial complex, posterior view; 89. syntergosternite, anterior view; 90. phallus complex, ventral view; 91. phallus complex, lateral view. Scale bar=0.1 mm.