Homoneura (Homoneura) dulongjiangica, 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 : 14-16

Homoneura (Homoneura) dulongjiangica sp. nov.

( Figs. 5, 16, 27, 62–66)

Diagnosis. Face with a large blackish brown median spot. Antenna blackish brown except yellow basal half of 1st flagellomere. Mesoscutum with a pair of brownish yellow lateral stripes. Wing with a narrow brown stripe on dmcu. Abdominal tergites 1–5 entirely black, tergite 6 yellow with a black median spot.

Description. MALE. Body length 4.1 mm, wing length 4.3 mm. FEMALE. Body length 4.8mm, wing length 5.3 mm.

Head ( Fig. 5) pale yellow. Face with a large blackish brown median spot. 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 1/7 height of eye. Occiput with a wide grayish black stripe confluent with ocellar triangle, upper half of occiput usually with a large brown spot on each side, not extending to top margin of eye. Antenna blackish brown except yellow basal half of 1st flagellomere, 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. 16) blackish brown with grayish white pruinescence. Mesoscutum with a pair of brownish yellow lateral stripes. 0+3 dc (anterior dc clearly behind transverse scutal suture), acr in 8 somewhat irregular rows. Anepisternum and pteropleuron brownish yellow, katepisternum yellow except brownish yellow anterior dorsal corner. Scutellum brownish black except yellow apical margin, with yellowish gray pruinescence. Legs pale yellow; hind tibia with an incomplete brown basal ring. Fore femur with 4 strong pv and 5 pd, ctenidium with 7 short bristles; fore tibia with 1 long preapical ad and 2 short apv. Mid femur with 4 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. 27) slightly yellow, with a narrow 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 2.1: 0.7: 0.4; r-m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1.5: 1; ultimate section of CuA 1 about 1/5 of penultimate. Halter pale yellow.

Abdomen yellow with sparse silvery white pruinescence; tergites 1–5 entirely black, tergite 6 yellow with a black median spot. Male genitalia ( Figs. 62–66): protandrium circular; epandrium with anterior margin curved in lateral view; surstylus incurved claviform; hypandrium with a pair of short broad ventral processes and hypandrial apodeme long; gonopod columniform; aedeagus without distinct incision, with a pair of median lateral processes, a pair of dorsal sclerites and apex trifurcated.

Type material Holotype ♂ ( CAU), CHINA, Yunnan Province: Nujiang, Gongshan, Dulongjiang Road (20K), 20. V. 2007, Xingyue Liu.

Distribution. China (Yunnan).

Remarks. The new species is somewhat similar to Homoneura (Homoneura) immaculata (Meijere) from the Oriental region in the following characters: face with spots; 1st flagellomere blackish brown; acr in 8 somewhat irregular rows; abdominal tergites 1–5 entirely blackish brown; surstylus extended from basal half of epandrium, claviform; hypandrium with a pair of short broad ventral process and hypandrial apodeme long. But it can be separated from the latter by the following features: face with a large blackish brown median spot; wing with a narrow brown stripe on dm-cu; abdominal tergite 6 with a black median spot; surstylus incurved; aedeagus without distinct incision, and with a pair of median lateral processes, a pair of dorsal sclerites and apex trifurcated. In H. (H.) immaculata , the face has a pair of brown median spots; the wing is hyaline; the abdominal tergite 6 has no spot; the surstylus is not incurved; the aedeagus has a distinct apical incision, the aedeagal dorsal sclerites is not trifurcated at apex ( Sasakawa 1992).

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