Homoneura (Neohomoneura) longicomata, 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 : 17-19

Homoneura (Neohomoneura) longicomata sp. nov.

( Figs. 27 , 55–59 )

Diagnosis. 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 spot present between brown apical spots on R2+3 and R4+5; a quadrate hyaline spot present between brown apical spot on M1 and spot on dm-cu. Abdomen yellow; tergites 2–6 each with black posterior margin.

Description. MALE. Body length 6.4 mm, wing length 6.3 mm. FEMALE. Body length 6.0– 6.5 mm, wing length 6.0– 6.4 mm.

Head yellow. Frons almost as long as wide and parallel–sided, with 2 brown stripes extending to ocellar triangle; ocellar triangle yellow with short setulae behind oc; oc developed, longer than anterior or; gena about 1/4 height of eye. Antenna yellow, 1st flagellomere 2.6 times as long as high; arista dark except brownish base, with longest setula longer than height of 1st flagellomere. Proboscis yellow, with yellowish and blackish setulae; palpus yellow, with dark setulae.

Thorax brownish yellow. Mesonotum with 0+3 dc, acr in 10 rows and prsc longer than anteriormost dc. 1 strong sa with 1 long and thin setula (shorter than 1/2 length of sa) behind sa. Legs yellow except tarsomeres 4–5 brown. Fore femur with 5 strong pv, 8–9 pd, and ctenidium with 16 short setae; fore tibia with 1 long preapical ad and 1 short apv. Mid femur with 6–7 a and 1 app; mid tibia with 1 strong preapical ad, 5 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. 27 ) 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 spot present between R2+3 and R4+5; apical spot on M1 extending to hind margin, a quadrate hyaline spot present between brown apical spot on M1 and spot of dm-cu; a small brown round spot on rm and a brown cloud 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 2.2 mm: 0.8 mm: 0.6 mm; r-m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 2.1 mm: 2.6 mm; ultimate section of CuA1 about 1/6 of penultimate. Halter brownish yellow.

Abdomen yellow, tergites 2–6 each with black posterior margin. Male genitalia ( Figs. 55–59 ): protandrium circular with setulae around spiracle; epandrium with five pairs of dorsal setae, dense long setulae near subapical concavity; surstylus broad rectangular with two acuate teeth in lateral view; hypandrium Y–shaped; gonopod protruding forwards with several apical teeth, aedeagus consisting of a pair of tiny ventral teeth on basal 1/3, a pair of blunt triangular basal processes and two pairs of acuate dorsal processes, truncate apically; aedeagal apodeme shorter than aedeagus.

Type material. Holotype 3 ( CAUC), Guilin, Jiuniutang, 18. X. 2004, Ding Yang. Paratypes: CHINA, Guangxi Province: 2 Ƥ ( CAUC), data same as holotype; Guangdong Province: 2 Ƥ ( CAUC), Nanling, 23. VII. 2003, Shuwen An.

Distribution. China (Guangxi, Guangdong).

Remarks. The species is somewhat similar to Homoneura (Neohomoneura) guangdongica sp. nov. from China (Guangdong) in the following characters: 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 spot present between brown apical spots on R2+3 and R4+5; a quadrate hyaline spot present between brown apical spot on M1 and spot on dm-cu; protandrium circular. But it can be separated from the latter by the abdominal tergites 2–6 having no brown median spot confluent with black posterior margin; the wing having a small brown round spot on r-m; the surstylus being broad quadrate, with two acuate processes; the gonopod protruding forwards with several apical teeth, the aedeagus being wide truncate apically with two pairs of acuate dorsal processes in the ventral view. In H. (N.) guangdongica , the abdominal tergites 2–6 have a large brown triangular median spot confluent with the black posterior margin; the wing has no brown spot on r-m; the surstylus is broad digitiform with the short setulae and the tiny teeth on the dorsal margin; the gonopod is subuliform in the ventral view, with a short setula; the aedeagus is narrow apically with a pair of horn–like subbasal processes in the ventral view and a pair of acuate triangular dorsoapical processes in the lateral view.

Etymology. Latin, longi-, prefix meaning long + comata, meaning having long setulae, referring to the epandrium with dense long setulae near subapical concavity; a feminine adjective.

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 55 – 59. Homoneura (Neohomoneura) longicomata sp. nov. Male. 55. protandrium and epandrium, lateral view; 56. protandrium, anterior view; 57. epandrial complex, posterior view; 58. aedeagal complex, ventral view; 59. aedeagal complex, lateral view. Scale 0.1 mm.