Homoneura (Homoneura) baihualingensis, Li & Yang, 2012

Li, Wenliang & Yang, Ding, 2012, Eleven new species of the Homoneura (Homoneura) beckeri group from Yunnan, China (Diptera, Lauxaniidae), Zootaxa 3537, pp. 1-28 : 3-9

Homoneura (Homoneura) baihualingensis sp. nov.

( Figs. 1, 12, 23, 34, 42–46)

Diagnosis. Face with a pair of blackish brown elliptical spots (sometimes two spots confluent) extending to inner margin of parafacial. Wing slightly yellow, with a narrow pale brown stripe on dm-cu. Abdominal tergites 1–2 each with a pair of blackish brown lateral bands, tergites 2–6 each with a black median spot, sometimes confluent with blackish brown lateral bands on tergites 3-4, tergites 5–6 each with a pair of blackish brown lateral bands.

Description. MALE. Body length 3.9–4.3 mm, wing length 3.7–4.1 mm. FEMALE. Body length 3.7–4.1 mm, wing length 3.8–4.2 mm.

Head ( Fig. 1) pale yellow. Face with a pair of blackish brown elliptical spots (sometimes spots confluent), extending to inner margin of parafacial. Frons about as long as wide and parallel-sided, with two narrow blackish gray stripes along or rows and a narrow brown triangular median stripe extending to ocellar triangle; ocellar triangle grayish black; oc strong, about as long as anterior or, anterior or slightly shorter than posterior or. Gena about 1/6 height of eye. Occiput with a wide grayish black stripe confluent with ocellar triangle. Antennal scape and pedicel black, 1st flagellomere brownish except yellow basally; 1st flagellomere 1.8 times longer than high; arista long plumose, blackish brown except brownish basally, with longest hairs longer than height of 1st flagellomere. Proboscis yellowish brown, with yellowish and blackish hairs; palpus pale yellow with blackish hairs.

Thorax ( Fig. 12) blackish brown with grayish white pruinescence. Mesoscutum with white pruinescence on anterior margin, 0+3 dc (anterior dc clearly behind transverse scutal suture), acr in 8 somewhat irregular rows. Anepisternum and katepisternum pale yellow with whitish gray pruinescence, and each with a grayish black spot. Scutellum brownish black except yellow along apical margin, with yellowish gray pruinescence. Legs pale yellow, but all tarsi dark yellow, except tarsomere 5 brown on apical half; hind tibia with an incomplete brown basal ring. Fore femur with 4 strong pv and 5–6 pd, ctenidium with 9–10 short bristles; fore tibia with 1 long preapical ad and 1 short apv. Mid femur with 6 a and 1 apv; mid tibia with 1 strong preapical ad and 3 strong apv. Hind femur with 1 preapical ad; hind tibia with 1 weak preapical ad and 1 short apv. Wing ( Fig. 23) slightly yellow, with a narrow pale brown stripe on dm-cu; subcostal cell hyaline; 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 2.3: 0.6: 0.4; r-m at middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1.3: 0.9; ultimate section of CuA 1 about 1/6 of penultimate. Halter pale yellow.

Abdomen ( Fig. 34) yellow with sparse silvery white pruinescence; tergites 1–2 each with a pair of blackish brown lateral bands, tergites 2–6 each with a black median spot, sometimes confluent with blackish brown lateral bands on tergites 3-4, tergites 5–6 each with a pair of blackish brown lateral bands. Male genitalia ( Figs. 42–46): protandrium circular, with a long narrow ventral process; epandrium nearly oblong in lateral view, surstylus consisting of a digitiform process and a narrow curved bar-like process; hypandrium with a pair of long narrow ventral processes, hypandrial apodeme distinct; gonopod columniform and slightly curved; aedeagus without apical incision, dorsal sclerites confluent at dorsal view, with a pair of lateral median teeth and a pair of lateral median processes.

Type material. Holotype ♂ ( CAU), CHINA, Yunnan Province: Baoshan, Baihualing, Wenquan , 29. V. 2007, Xingyue Liu . Paratypes: CHINA, Yunnan Province: 1 ♂, 3 ♀ ( CAU), data same as holotype ; 4 ♂, 3 ♀ ( CAU), Baoshan, Baihualing, Wenquan, 23. V. 2006, Xingyue Liu ; 2 ♂, 2 ♀ ( CAU), Baoshan, Baihualing, Wenquan, 23. V. 2006, Yajun Zhu ; 1 ♀ ( CAU), Nujiang, Gongshan, Dimaluo, 19. V. 2007, Xingyue Liu ; 1 ♂ ( CAU), Nujiang, Gongshan, Bingzhongluo, Wuli, 25. V. 2007, Xingyue Liu .

Distribution. China (Yunnan).

Remarks. The new species is somewhat similar to Homoneura (Homoneura) latissima Shi & Yang from China (Hainan) in the following characters: wing with a pale brown stripe on dm-cu, abdominal tergite 6 yellow with a small brown median spot; protandrium circular, with a long narrow ventral process; surstylus consisting of digitiform process and a narrow curved bar-like process; gonopod columniform. But it can be separated from the latter by the following features: face with a pair of blackish brown elliptical median spots (sometimes two spots confluent); antennal scape and pedicel black, 1st flagellomere brownish except yellow basally; aedeagus without apical incision and apical processes. In H. (H.) latissima , the face has no spots; the antenna is blackish brown except the 1st flagellomere is pale yellow apically; the aedeagus has a small apical incision and two pairs of contorted apical processes (Shi & Yang 2009).

Etymology. The new species is named after the type locality Baihualing.