Homoneura (Neohomoneura) tripetata, 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 : 39-42

Homoneura (Neohomoneura) tripetata sp. nov.

( Figs. 9 , 36–40 )

Diagnosis. Fore femur with 4 strong pv, hind tibia with 1 very long ad. A stripe–like spot on dm-cu. Cerci with long hairs. Aedeagus with a pair of knife–like long lateral processes, a short and a long dorsal process in lateral view.

Description. MALE. Body length 5.0– 5.4 mm, wing length 4.6–5.5 mm.

Head yellowish to brownish yellow. Frons about as long as wide and parallel–sided, with 2 brown stripes extending to ocellar triangle; ocellar triangle brownish; oc developed, longer than anteriormost or; gena about 1/7 height of eye. Antenna yellow; 1st flagellomere 1.9 times as long as wide; arista dark except brownish base, with longest hairs as long as width of 1st flagellomere. Proboscis yellow, with yellowish and dark hairs; palpus yellow, with dark hairs.

Thorax yellowish to brownish yellow. Mesoscutum with 0+3 dc (anteriormost dc clearly behind transverse scutal suture), acr in 8 somewhat irregular rows, uniformly short hair–like; prsc as long as 1st post– sutural dc. Legs yellowish to brownish yellow. Fore femur with 4 strong pv, 8 pd, and ctenidium with 11 short bristles; fore tibia with 1 long preapical ad and 1 short apv. Mid femur with 6 a and 1 app, mid tibia with 1 strong preapical ad, 5 short pd and 3 strong apv. Hind femur with a row of weak av (only 3 apical bristles distinct) and 1 preapical ad; hind tibia with 1 very long strong preapical ad and 1 short apv; 1st tarsomere with rows of short and dense v. Wing ( Fig. 9 ) slightly tinged yellowish, spots on R4+5 and R2+3 confluent (or narrowly separated) and contacted with spot on M1+2, apical spot on R4+5 with basal extremity at same vertical level or before that on R2+3; a stripe–like spot on dm-cu; 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 2.56: 0.73: 0.51; r-m before middle of discal cell; ultimate and penultimate sections of M1+ 2 in proportion of 1.54: 2.20; ultimate section of CuA1 about 1/11 of penultimate. Halter yellow.

Abdomen yellowish to brownish yellow. Male genitalia ( Figs. 36–40 ): protandrium semicircular with hairs; epandrium with long bristles; surstylus very short and obtuse apically, with a short thick inner process visible in posterior view; hypandrium V–shaped; gonopod slender with 1 bristle; aedeagal apodeme short; aedeagus very complex in structure, with a pair of knife–like long lateral processes, a short and a long dorsal process in lateral view. Cerci with long hairs.

FEMALE. Unknown.

Type material. Holotype male, Hainan: Jianfengling National Nature Reserve, Zhiwuyuan (800 m), 24. X. 2007, Ding Yang. Paratypes: 1 male, data same as holotype; 1 male, Hainan: Yinggeling National Nature Reserve, Hongmao village (430 m), V. 22. 2007, Kuiyan Zhang.

Distribution. China (Hainan).

Remarks. The new species is similar to Homoneura (Neohomoneura) longiseta Sasakawa from Vietnam in the hind tibia with one very long ad, but it can be separated from the latter by the surstylus very short, the aedeagus with a pair of knife–like long lateral processes, a short and a long dorsal process in lateral view and the male abdominal tergites without any spots. In longiseta , the surstylus is long; the aedeagus has no dorsal process but with a trifurcated lateral process; the male abdominal tergites 2–6 have spots ( Sasakawa, 2001).

Etymology. Latin, feminine, ‘ tripetata ’ = tripetaloid, referring to the aedeagus tripetaloid in ventral view.

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 36 – 40. Homoneura (Neohomoneura) tripetata sp. nov. Male. 36. protandrium and epandrium, lateral view; 37. protandrium, anterior view; 38. epandrium, posterior view; 39. aedeagal complex, ventral view; 40. aedeagal complex, lateral view.