Homoneura semiannulata, 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 : 555-558

Homoneura semiannulata new spec. Figs 21-30

MATERIAL: Holotype ♁ ( CAU), CHINA, Yunnan Province: Kunming, Xishan, Erdaogou (24°58'N, 102°37'E, 1900 m), 15. IV. 2007, Hui Dong. – Paratypes: CHINA, Yunnan Province: 1 ♀ ( CAU), data same as holotype. – 1 ♁ ( MNHG), Kunming, Xishan (24°58'N, 102°37'E, 1900 m), 16. V. 1981, Jikun Yang; 1 ♁ ( CAU), Kunming, Fengmingshan (25°38'N, 102°51'E, 2600 m), 3. X. 1987, Jinjun Du. – 1 ♁, 4 ♀♀ ( CAU & MNHG), Kunming, Xishan (24°58'N, 102°37'E, 1900 m), 28. V. 2005, Xingyue Liu .

ETYMOLOGY: Latin, semi -, prefix meaning half + annulata, meaning annular, referring to the shape of the hypandrial ventral processes in the lateral view.

DIAGNOSIS: Face brownish except yellow ventral margin medially. Wing (Fig. 23) slightly yellow, with 5 brown spots, separately on r-m, dm-cu, and preapices of R 2+3, R 4+5, M 1, preapcial spot of M 1 obscure. Abdominal tergites 5-6 each with a brown median spot; protandrium incompletely circular; surstylus consisting of 2 processes; hypandrium semiannular in the lateral view, long ventral processes incurved and almost convergent; aedeagus with deep apical incision.

DESCRIPTION

Male: Body length 4.7-5.7 mm, wing length 5. 0-5.7 mm.

Female: Body length 5. 0-5.3 mm, wing length 5.3-5.5 mm.

Head (Fig. 23) yellow. Face brownish except yellow ventral margin medially. 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 1/6 height of eye. Antennal scape and pedicel yellow, 1st flagellomere brownish except yellow basally; 1st flagellomere 1.3 times longer than high; arista long plumose, blackish brown except brown basally, with longest hairs as long as height of 1st flagellomere. Proboscis yellowish brown, with yellowish and blackish hairs; palpus pale yellow with blackish hairs.

Thorax (Fig. 24) yellow with grayish white pruinescence. Mesoscutum with 0+3 dc, anterior dc clearly behind transverse scutal suture, acr in 6 somewhat irregular rows, prsc somewhat shorter than 1st post-sutural dc. Legs pale yellow. Fore femur with 4 strong pv and 6 pd, ctenidium with 10-12 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. 22) slightly yellow, with 5 brown spots, sepa-

FIGS 21-25

Homoneura semiannulata sp. n. Male. (21) Body, lateral view. (22) Wing. (23) Head, dorsal view. (24) Mesoscutum, dorsal view. (25) Abdomen, dorsal view.

rately on r-m, dm-cu, and preapices of R 2+3, R 4+5, M 1, 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 2.6: 0.8: 0.5; r-m beyond 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. 25) yellow; tergites 5-6 each with a blackish brown median spot. Male genitalia (Figs 26-30): protandrium incompletely circular; epandrium nearly oblong in lateral view, surstylus consisting of 2 small processes, anterior process at basal 1/3 of epandrium, posterior process at ventral apex of epandrium; hypandrium semiannular in the lateral view, hypandrial apodeme long and parallel, long ventral processes incurved and almost convergent; gonopod columniform, shorter than 1/2 length of aedeagus; aedeagus with deep apical incision, pair of dorsal sclerites bifurcated apically, pair of ventral aclerites curved outward and acute apically; aedeagal apodeme longer than aedeagus.

DISTRIBUTION: China (Yunnan).

FIGS 26-30

Homoneura semiannulata sp. n. Male. (26) Protandrium and epandrium, lateral view. (27) Epandrial complex, posterior view. (28) Protandrium, anterior view. (29) Aedeagal complex, ventral view. (30) Aedeagal complex, lateral view. Scale 0.5 mm.

REMARKS: The new species resembles H. haejuana Sasakawa & Kozánek from North Korea in the following characters: frons slightly wider than long; ocellar triangle brown; wing with similar pattern. But it can be separated from the latter by the following features: face brownish except yellow on ventral margin medially; abdominal tergites 5-6 each with a blackish brown median spot; protandrium incompletely

FIGS 31-35

Homoneura trisurstylata sp. n. male. (31) Body, lateral view. (32) Wing. (33) Head, dorsal view. (34) Mesoscutum, dorsal view. (35) Abdomen, dorsal view.

circular; surstylus consisting of 2 small processes; hypandrium semiannular in the lateral view. In H. haejuana , the face is entirely yellow; the abdominal tergites 3-6 each has a brown median longitudinal band; the protandrium is a complete circle; the surstylus has a long ungulate process; the hypandrium is not semiannular in the lateral view (Sasakawa & Koz ά nek 1995).