Homoneura (Neohomoneura) guangdongica, Shi, Li, Wang, Jun Chao & Yang, Ding, 2011

Shi, Li, Wang, Jun Chao & Yang, Ding, 2011, Nine new species from China of the subgenera Chaetohomoneura and Neohomoneura in the genus Homoneura (Diptera, Lauxaniidae), Zootaxa 2975, pp. 1-28 : 15-17

Homoneura (Neohomoneura) guangdongica sp. nov.

( Figs. 25 , 50–54 )

Diagnosis. Mesonotum with a pair of brown stripes between dc rows in male (indistinct in female). Wing with brown apical spots on R2+3, R4+5 and M1 confluent and forming a wide transverse band, extending to tip of vein; a triangular hyaline marginal area present between brown apical spots on R2+3 and R4+5; a quadrate hyaline spot present between brown apical spot on M1 and brown spot on dm-cu. Male abdominal tergites 2–6 each with black posterior margin, a large brown triangular median spot confluent with black posterior margin; female tergites 2–7 each with black posterior margin, but no brown median spot.

Description. MALE. Body length 5.6 mm, wing length 5.6 mm. FEMALE. Body length 6.0 mm, wing length 5.6 mm.

Head yellow. Frons about as long as wide and parallel–sided, with two pale brown stripes extending to ocellar triangle; ocellar triangle pale brown with short setulae behind oc; oc developed, about as long as anterior or; gena about 1/7 height of eye. Antenna yellow, 1st flagellomere 2.5 times as long as high; arista dark except brownish base, with longest setula as long as height of 1st flagellomere. Proboscis yellow, with yellowish and blackish setulae; palpus yellow, with blackish setulae.

Thorax brownish yellow. Mesonotum with a pair of brown stripes between dc rows in male (indistinct in female), 0+3 dc, acr in 8 somewhat irregular row and prsc longer than anteriormost dc. 1 strong sa. Legs yellow except tarsomeres 3–5 brown. Fore femur with 5 strong pv, 8 pd, and ctenidium with 12 short setae; fore tibia with 1 long preapical ad and 1 short apv. Mid femur with 5–6 a and 1 app; mid tibia with 1 strong preapical ad, 7 short p and 3 strong apv. Hind femur with a row of weak av (only 3 apical setae distinct) and 1 preapical ad; hind tibia with 1 weak preapical ad and 1 short apv. Wing ( Fig. 25 ) slightly yellow, brown apical spots on R2+3, R4+5 and M1 confluent and forming a wide transverse band, extending to tip of vein; apical spots on R2+3 and R4+5 with basal extremities before vertical level of dm-cu, a triangular hyaline marginal area present between brown apical spots on R2+3 and R4+5; a quadrate hyaline spot present between brown apical spot on M1 and brown spot on dm-cu; a brown spot constricted at middle on dm-cu; subcostal cell brown; costa with 2nd (between R1 and R2+3), 3rd (between R2+3 and R4+5) and 4th (between R4+5 and M1) sections in proportion of 2.6 mm: 0.8 mm: 0.6 mm; r-m at middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1.8 mm: 2.5 mm; ultimate section of CuA1 about 1/6 of penultimate. Halter yellow.

Abdomen yellow; male tergites 2–6 each with black posterior margin and a large brown triangular median spot confluent with black posterior margin; female tergites 2–7 each with black posterior margin, but no brown median spot. Male genitalia ( Figs. 50–54 ): protandrium circular with dorsal setulae; epandrium with five pairs of long dorsal setae; surstylus broad, digitiform with short setulae and tiny teeth on dorsal margin; hypandrium nearly H– shaped, gonopod slender subuliform in ventral view but broad columnar in lateral view, with a short setula; aedeagal apodeme longer than aedeagus, aedeagus slender, consisting of a pair of horn–like subbasal processes, a pair of broad triangular basal processes and a pair of acuate triangular dorsoapical processes.

Type material. Holotype 3 ( CAUC), CHINA, Guangdong Province: Ruyuan, Nanling, 26. III. 2003, Ding Yang. Paratype: 1 Ƥ ( CAUC), CHINA, Guangdong Province: data same as holotype.

Distribution. China (Guangdong).

Remarks. The species is somewhat similar to Homoneura (Neohomoneura) incompleta (Malloch) from China, Indonesia and Vietnam in the following characters: wing with apical spots on R2+3, R4+5 and M1 extending to tip of each vein, a triangular hyaline marginal area present between apical spots on R2+3 and R4+5, a quadrate hyaline spot present between apical spot on M1 and spot on dm-cu, and subcostal cell being brown. But it can be separated from the latter by the abdominal tergites 2–6 having black posterior margin, a large brown triangular median spot being confluent with the black posterior margin; the surstylus being broad digitiform with the short setulae and the tiny teeth on the dorsal margin. In H. (N.) incompleta , the abdominal tergites 2–6 have black posterior margins without brown median spots; the surstylus is narrow, bifurcated at the tip, but no tiny teeth on the dorsal margin ( Sasakawa, 2001).

Etymology. The new species is named after the type locality Guangdong Province.

Figures

FIGURES 19 – 33. Wing. 19. Homoneura (Neohomoneura) biconcava sp. nov.; 20. H. (N.) denticuligera sp. nov.; 21, 22. H. (N.) digitata Shi & Yang, 2008; 23. H. (N.) elliptica sp. nov.; 24. H. (N.) grandipunctata Gao & Yang, 2006; 25. H. (N.) guangdongica sp. nov.; 26. H. (N.) guangxiensis Gao & Yang, 2004; 27. H. (N.) longicomata sp. nov.; 28, 29. H. (N.) nebulosa Sasakawa, female and male; 30. H. (N.) nigrimarginata sp. nov.; 31. H. (N.) pufujii sp. nov.; 32. H. (N.) quadrifera sp. nov.; 33. H. (N.) setuligera Gao & Yang, 2005.

FIGURES 50 – 54. Homoneura (Neohomoneura) guangdongica sp. nov. Male. 50. protandrium and epandrium, lateral view; 51. protandrium, anterior view; 52. epandrial complex, posterior view; 53. aedeagal complex, ventral view; 54. aedeagal complex, lateral view. Scale 0.1 mm.