Homoneura (Neohomoneura) zengae, Shi, Li & Yang, Ding, 2008

Shi, Li & Yang, Ding, 2008, Species of the subgenus Neohomoneura van der Wulp from Hainan in China (Diptera, Lauxaniidae), Zootaxa 1793, pp. 28-46 : 42-44

Homoneura (Neohomoneura) zengae sp. nov.

( Figs. 10 , 41–45 )

Diagnosis. Apical spot on R4+5 confluent with that on R2+3 but separated from spot on M1+2; spot on dm-cu constricted at middle. Male abdominal tergites 2–6 (female 2–7) each with dark posterior margin and male tergites 4–6 (female 4–7) each with a dark triangular median spot connected with dark posterior margin. Aedeagus short and wide with a wide apical incision.

Description. MALE. Body length 5.9–6.8 mm, wing length 5.1–5.9 mm. FEMALE. Body length 6.1–6.3 mm, wing length 5.4–5.5 mm.

Head brownish yellow. Frons about as long as wide and parallel–sided, with 2 brown stripes extending to ocellar triangle; ocellar triangle yellowish; oc developed, about as long as anteriormost or; gena about 1/5 height of eye. Antenna yellow, 1st flagellomere 2.5 times as long as wide; arista brown except yellowish base, with longest hairs longer than width of 1st flagellomere. Proboscis yellow, with yellowish hairs; palpus yellow, with dark hairs.

Thorax brownish yellow. Mesoscutum with 0+3 dc (anteriormost dc clearly behind transverse scutal suture), acr in 10 somewhat irregular rows, uniformly short hair–like; prsc slightly longer than 1st post– sutural dc. Legs yellow, tarsomeres 2–5 brownish yellow. Fore femur with 5–6 strong pv, 8–9 pd, and ctenidium with 15 short bristles; fore tibia with 1 long preapical ad and 1 short apv. Mid femur with 4–6 a and 1 app, mid tibia with 1 strong preapical ad, 8–10 short pd and 3 strong apv. Hind femur with a row of weak av (only 2–3 apical bristles distinct) and 1 preapical ad; hind tibia with 1 weak preapical ad and 1 short strong apv; 1st tarsomere with rows of short and dense v. Wing ( Fig. 10 ) slightly tinged yellowish, apical spot on R4+5 confluent with that on R2+3 but separated from spot on M1+2, apical spot on R4+5 with basal extremity at same vertical level or before apical spot on R2+3; a spot on dm-cu constricted at middle; subcostal cell hyaline; costa with 2nd (between R1 and R2+3), 3rd (between R2+3 and R4+5) and 4th (between R4+5 and M1+2) sections in proportion of 3.1: 0.8: 0.6; r-m before middle of discal cell; ultimate and penultimate sections of M1+ 2 in proportion of 1.8: 2.7; ultimate section of CuA1 about 1/7 of penultimate. Halter yellow.

Abdomen brownish yellow, male tergites 2–6 (female 2–7) each with dark posterior margin and male tergites 4–6 (female 4–7) each with a dark triangular median spot connected with dark posterior margin. Male genitalia ( Figs. 41–45 ): protandrium circular with a ventral bridge and two hairs around spiracle; surstylus long with curved and obtuse tip; hypandrium H–shaped, hypandrial apodemes distinct but weak; gonopod long triangular; aedeagus short and wide, with a wide apical incision, and with two pairs of lateral and ventral spines.

Type material. Holotype male, Hainan: Wuzhishan National Nature Reserve, Shuimanxiang (600 m), 15. V. 2007, Jie Zeng. Paratypes: 1 female, Hainan: data same as holotype; 1 male, Hainan: Jianfengling National Nature Reserve, Mingfenggu (1000 m), 25. X. 2007, Xingyue Liu; 1 female, Hainan: Bawangling National Nature Reserve, Donger station (1000 m), 22. X. 2007, Xingyue Liu; 3 males, 1 female, Hainan: Yinggeling National Nature Reserve, Hongmao village (430 m), 19. X. 2007, Ding Yang; 1 male, 1 female, Hainan: Jianfengling National Nature Reserve, Zhiwuyuan (800 m), 12. V. 2007, Junhua Zhang; 1 male, Hainan: Jianfengling National Nature Reserve, Zhiwuyuan (800 m), 22. V. 2007, Gang Yao.

Distribution. China (Hainan).

Remarks. The new species is very similar to Homoneura (Neohomoneura) nadaensis Yang, Hu & Zhu from China (Hainan), but it can be separated from the latter by the protandrium circular with a ventral bridge, the hypandrium H–shaped, and the aedeagus short and wide with a wide apical incision. In H. nadaensis , the protandrium is semicircular; the hypandrium is U–shaped; and the aedeagus is longer with a narrow and deep apical incision.

Etymology. The species is dedicated to Ms. Jie Zeng, who provided many specimens from her collection.

Figures

FIGURES 1 – 10. Wings. 1. Homoneura (Neohomoneura) digitata sp. nov.; 2. H. (N.) incompleta Malloch, 1927; 3. H. (N.) jianfengensis Yang, Hu & Zhu, 2002; 4 – 5. H. (N.) nadaensis Yang, Hu & Zhu, 2002; 6. H. (N.) pollex Sasakawa, 2001; 7. H. (N.) tortilis sp. nov.; 8. H. (N.) tricuspidata sp. nov.; 9. H. (N.) tripetata sp. nov.; 10. H. (N.) zengae sp. nov.

FIGURES 41 – 45. Homoneura (Neohomoneura) zengae sp. nov. Male. 41. protandrium and epandrium, lateral view; 42. protandrium, anterior view; 43. epandrium, posterior view; 44. aedeagal complex, ventral view; 45. aedeagal complex, lateral view.