Homoneura (Homoneura) longiprocessa, 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 : 22-24

Homoneura (Homoneura) longiprocessa sp. nov.

( Figs. 9, 20, 31, 40, 81–85)

Diagnosis. Face without spots. Antenna blackish brown. Wing without markings. Abdominal tergite 2 with a pair of blackish brown lateral posterior bands; tergites 3–6 each with a black median spot, confluent with black posterior band on tergites 3–5.

Description. MALE. Body length 3.8–4.3 mm, wing length 3.9–4.1 mm. FEMALE. Body length 3.5–4.5 mm, wing length 3.3–4.3 mm.

Head ( Fig. 9) pale yellow. Face without spots. 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. Antenna blackish brown, 1st flagellomere 1.6 times longer than high; arista long plumose, black 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. 20) 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 6 somewhat irregular rows. Anepisternum and katepisternum pale yellow with whitish gray pruinescence, and each with a grayish black spot. Scutellum brownish black except yellow 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 pd, ctenidium with 11–13 short bristles; fore tibia with 1 long preapical ad and 2 short apv. Mid femur with 5 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. 31) slightly yellow, without markings; 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 1.9: 0.6: 0.4; r-m at middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1.3: 0.8; ultimate section of CuA 1 about 1/5 of penultimate. Halter pale yellow.

Abdomen ( Fig. 40) yellow with sparse silvery white pruinescence; tergite 2 with a pair of blackish brown lateral posterior bands; tergites 3–6 each with a black median spot, confluent with black posterior band on tergites 3–5. Male genitalia ( Figs. 81–85): protandrium circular, with a long narrow furcated ventral process; epandrium nearly triangular in posterior view, surstylus broad, hairy, digitiform; hypandrium with a narrow, furcated ventral process, hypandrial apodeme distinct; gonopod columniform; aedeagus without distinct apical incision, consisting of a pair of dorsal sclerites, with a pair of lateral median teeth, a pair of ventral teeth and a pair of dorsal teeth.

Type material. Holotype ♂ ( CAU), CHINA, Yunnan Province: Xishuangbanna, Mengla, Bubeng Village , 11. V. 2009, Tingting Zhang . Paratypes: CHINA, Yunnan Province: 6 ♂, 1 ♀ ( CAU), Xishuangbanna, Mengla, Bubeng Village, 11. V. 2009, Tingting Zhang ; 1 ♀ ( CAU), Xishuangbanna, Mengla, Bubeng Village, 8. V. 2009, Guoquan Wang ; 2 ♂, 1 ♀ ( CAU), Xishuangbanna, Mengla, Bubeng Village, 10. V. 2009, Tingting Zhang ; 2 ♂, 4 ♀ ( CAU), Xishuangbanna, Mengla, Bubeng Village, 9. V. 2009, Tingting Zhang ; 2 ♂, 2 ♀ ( CAU), Xishuangbanna, Mengla, Bubeng Village, 9. V. 2009, Guoquan Wang ; 2 ♂, 1 ♀ ( CAU), Hekou, Nanxizhen (132m), 22. V. 2009, Tingting Zhang ; 1 ♂, 2 ♀ ( CAU), Hekou, Nanxizhen (132m), 22. V. 2009, Guoquan Wang ; 1 ♂, 4 ♀ ( CAU), Xishuangbanna, Mengla, Yaoqu (782m), 13. V. 2009, Tingting Zhang ; 1 ♂, 1 ♀ ( CAU), Xishuangbanna, Menglun, No. 55, Field (630m),, 7. V. 2009, Guoquan Wang .

Distribution. China (Yunnan).

Remarks. The new species is somewhat similar to Homoneura (Homoneura) flavida Shi &Yang from China (Yunnan and Hainan) in the following characters: face without spots and parafacial brown to blackish brown, abdominal tergite 6 yellow with a small brown median spot; gonopod columniform. But it can be separated from the latter by the following features: wing without markings; protandrium with a long narrow furcated ventral process; surstylus broad, hairy, digitiform; aedeagus without distinct apical incision, and with a pair of lateral median teeth, a pair of ventral teeth and a pair of dorsal teeth. In H. (H.) flavida , the wing has a brown stripe on dmcu; the surstylus is nearly knife–like; aedeagus has a distinct apical incision, the aedeagus has no distinct process (Shi & Yang 2009).

Etymology. Latin, longi -, prefix meaning long + processa, meaning process, referring to the protandrium having a long, narrow, furcated ventral process.