Homoneura (Homoneura) dorsocuspidata 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 : 154-156

Homoneura (Homoneura) dorsocuspidata Gao & Shi sp. nov. ( Figs 22–33 )

Type material. Holotype ♂ ( IMAU), CHINA, Shaanxi, Foping, Yueba, Heilongtan , 27.VIII.2014, Xiumei Lu . Paratypes. 1♂ 1♀ ( IMAU), same data as holotype ; 1♂ ( IMAU), CHINA, Shaanxi, Foping, Daguping , 1366 m, 27.VIII.2014, Xiumei Lu .

Diagnosis. The new species is similar to H. (H.) longicornis Sasakawa, 2002 from China (Taiwan), but the latter has sparse white pruinosity on frons and dense white pruinosity on face and occiput; surstylus is curved and pointed dorsally, pregonite has short setulae at apex, and phallus rounded and widen apically in lateral view ( Sasakawa, 2002: fig. 13). It is also similar to H. (H.) fengyangshanica Shi & Yang, 2014 from China (Zhejiang), but the latter has the following features: the ctenidium on fore femur has 14 short setae; the antenna is yellow except for 1st flagellomere black on dorsal half; the surstylus concaves backward and is blunt at apex in lateral view; the phallus has a pair of furcated lateral processes at middle in ventral view ( Shi & Yang, 2014: figs 112, 115).

Description. Male. Body length 4.5–4.6mm, wing length 4.0– 4.1 mm. Female. Body length 4.5 mm, wing length 4.6 mm.

Head ( Figs 23–24 ) yellow. Frons with a pair of brown stripes extending to ocellar triangle, ocellar triangle brown. Ocellar setae longer than fronto-orbital setae. Parafacial yellow with black inner margin and a row of short setulae in same length at apical half. Gena about 1/6 height of eye. Antenna yellow, 1st flagellomere 1.5 times longer than high; arista blackish brown, pubescent, with longest ray shorter than 2/5 height of 1st flagellomere. Proboscis and palpus yellow.

Thorax ( Figs 22, 25 ) brown. Postpronotum yellow. Mesonotum with 0+3 dorsocentral setae (1st postsutural dorsocentral seta very close to transverse suture), acrostichal setae in 6 rows, a pair of prescutellar setae longer than anteriormost dorsocentral setae. Legs yellow except for all tarsomeres 3–5 brown. Fore femur with 4 posterior ventral setae and 4 posterior dorsal setae, ctenidium with 16–17 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 2 strong apicoventral setae. Hind femur with 1 short preapical anterior dorsal seta; hind tibia with 1 long preapical anterior dorsal seta and 1 short apicoventral seta. Wing ( Fig. 28 ) hyaline, with brown spots as follows: an elliptical spot on apex of R 2+3; a small irregular apical spot extending to anterior margin of wing and two small square medial spots on R 4+5, one of median spots fused with apical spot on R 2+3; a subapical spot on M 1; clouds on crossvein r-m and dm-cu; basal section of R 4+5 brown; a spot at apex of subcostal cell and R 1. 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 5:2.3:1; crossvein r-m before discal cell;

ultimate and penultimate sections of M 1 in proportion of 1:1.6; ultimate sections of CuA 1 about 1/8. Halter white.

Abdomen ( Figs 22, 26, 27 ) yellow or dark yellow, tergites 2–6 each with a brown medial stripe and a pair of brown triangular lateral spots. Male genitalia ( Figs 29−33 ): syntergosternite 7+8 semicircular; epandrium with four pairs of long dorsal setae in lateral view; surstylus long triangular with sparse short setulae and sharp at apex, fused with epandrium; hypandrium nearly H-shaped, hypandrial apodeme short; pregonite coniform and slightly bended in ventral view; phallus with dorsoapical concavity and sharp at apex in lateral view, phallic apodeme shorter than phallus.

Distribution. China (Shaanxi).

Etymology. The new species is named from the Latin, “ dorso- ”, prefix meaning dorsal, and “ cuspidatus ”, meaning sharp, referring to the phallus being sharp at apex; a feminine adjective.

Funding The research is supported by National Natural Science Foundation of China (31660622). Acknowledgements The authors give sincere thanks to the collectors, to the reviewers for reviewing the manuscript and giving good advice, to the China Scholarship Council ( CSC) for supporting me to check type specimens in the U.S.A.

Figures

Figures 22–28. Homoneura (Homoneura) dorsocuspidata Gao & Shi sp. nov., paratype, male. 22. Habitus, lateral view. 23–24. Head, anterior and lateral view. 25. Thorax, dorsal view. 26–27. Abdomen, dorsal and lateral view. 28. Wing.

Figures 29–33. Homoneura (Homoneura) dorsocuspidata Gao & Shi sp. nov., paratype, male genitalia. 29. Syntergosternite and epandrial complex, lateral view. 30. Epandrial complex, posterior view. 31. Syntergosternite, anterior view. 32. Phallus complex, ventral view. 33. Phallus complex, lateral view. Scale bar=0.1mm.