Homoneura trisurstylata, Li & Yang, 2013

Li, Wenliang & Yang, Ding, 2013, Four new species of Homoneura s. str. from Yunnan, China (Diptera, Lauxaniidae), Revue suisse de Zoologie 120 (4), pp. 549-561 : 558-560

Homoneura trisurstylata new spec. Figs 31-40

MATERIAL: Holotype ♁ ( CAU), CHINA, Yunnan Province: Xishuangbanna, Menglun, Lushilin (21°54'N, 101°16'E, 600 m), 5. V. 2009, Tingting Zhang. – Paratypes: CHINA, Yunnan Province: 1 ♁, 1 ♀ ( MNHG), Xishuangbanna, Menglun, Lushilin (21°54'N, 101°16'E, 600 m), 21. IV. 2007, Wenliang Li. – 1 ♀ ( CAU), Xishuangbanna, Menglun, Lushilin (21°54'N, 101°16'E, 600 m), 21. IV. 2007, Hui Dong .

ETYMOLOGY: Latin, tri -, prefix meaning three + surstyla, meaning surstylus, referring to the surstylus consisting of 3 processes.

DIAGNOSIS: Antenna yellow except 1st flagellomere blackish brown at apical 1/3. Wing with 5 brown spots, separately on r-m, dm-cu, preapices of R 2+3, M 1, and apex of R 4+5, preapcial spot of M 1 obscure. Protandrium circular; surstylus consisting of 3 processes; hypandrium H-shaped.

FIGS 36-40

Homoneura trisurstylata sp. n. male. (36) Protandrium and epandrium, lateral view. (37) Epandrial complex, posterior view. (38) Protandrium, anterior view. (39) Aedeagal complex, ventral view. (40) Aedeagal complex, lateral view. Scale 0.5 mm.

DESCRIPTION

Male: Body length 4.8-5.1 mm, wing length 4.6-4.8 mm.

Female: Body length 4.3-4.6 mm, wing length 4.5-4.6 mm.

Head (Fig. 33) yellow. Frons slightly wider than long and parallel-sided; ocellar triangle brown; oc strong, about as long as anterior or, anterior or slightly shorter than posterior or. Gena about 1/7 height of eye. Antenna yellow except 1st flagellomere blackish brown at apical 1/3; 1st flagellomere 1.4 times longer than high; arista long plumose, 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. 34) yellow with grayish white pruinescence. Mesoscutum with 0+3 dc, anterior dc clearly behind transverse scutal suture, acr in 10 somewhat irregular rows, prsc somewhat shorter than 1st post-sutural dc. Legs pale yellow. Fore femur with 4 strong pv and 5 pd, ctenidium with 12-17 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. 32) slightly yellow, with 5 brown spots, separately on r-m, dm-cu, preapices of R 2+3, M 1, and apex of R 4+5, preapcial spot of M 1 obscure; 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 2.5: 0.7: 0.5; r-m at middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1.5: 1.0; ultimate section of CuA 1 about 1/8 of penultimate. Halter pale yellow.

Abdomen (Fig. 35) yellow. Male genitalia (Figs 36-40): protandrium circular; epandrium nearly oblong in lateral view, surstylus consisting of 3 processes, in the lateral view, anterior process claviform and recurved, median process triangulum and curved forward, posterior process similar as median process in shape but smaller; hypandrium H-shaped, hypandrial apodeme long and parallel; gonopod columniform, shorter than aedeagus; aedeagus without apical incision, dorsal sclerites with pair of trochiformis processes laterally, and with a small acute process preapically; aedeagal apodeme about as long as aedeagus.

DISTRIBUTION: China (Yunnan).

REMARKS: The new species resembles H. quiquenotata (de Meijere) from Java in the following characters: 1st flagellomere blackish brown apically; wing with similar pattern; protandrium circular. But it can be separated from the latter by the following features: surstylus consisting of 3 processes; aedeagus without apical incision; aedeagal apodeme about as long as aedeagus. In H. quiquenotata , the surstylus has 1 process; the aedeagus has a deep apical incision; the aedeagal apodeme is shorter than the aedeagus ( Sasakawa, 1992).