Homoneura (Homoneura) columnaria, Shi, Li & Yang, Ding, 2009

Shi, Li & Yang, Ding, 2009, Notes on the Homoneura (Homoneura) beckeri group from the Oriental Region, with descriptions of ten new species from China (Diptera: Lauxaniidae), Zootaxa 2325, pp. 1-28 : 6-8

Homoneura (Homoneura) columnaria sp. nov.

( Figs. 2 , 17–21 )

Diagnosis. Face pale yellow with a pair of blackish brown elliptical median spots (sometimes two spots confluent), extending to inner margin of parafacial; parafacial brown. Antenna black. Wing with a pale brown elliptical spot on dm-cu. Abdominal yellow, tergite 2 with a pale brown median spot and a pair of blackish brown lateral bands; tergites 3–5 each with a black posterior band, and a black triangular median spot confluent with black posterior band; tergite 6 with a small brown median spot.

Description. MALE. Body length 4.4–5.3 mm, wing length 4.0– 4.3 mm.

Head pale yellow. Face pale yellow with a pair of blackish brown elliptical median spots (sometimes two spots confluent), extending to inner margin of parafacial; parafacial brown. Frons yellow, 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 (apical part broken), 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. Antenna black, 1st flagellomere 2.4 times longer than high; arista long plumose, black except brownish base, with longest hairs longer than height of 1st flagellomere. Proboscis yellowish brown, with yellowish and blackish hairs; palpus pale yellow with blackish hairs.

Thorax blackish brown with grayish yellow pollen. Mesoscutum with white pollen on anterior margin, 0+3 dc (anterior dc clearly behind transverse scutal suture), acr in 6 somewhat irregular rows. Anepisternum and katepisternum pale yellow with whitish gray pollen, and each with a grayish black spot. Scutellum brownish black except yellow apical margin, with yellowish gray pollen. Legs pale yellow, but all tarsi dark yellow, except tarsomere 5 brown on apical 2/3; hind tibia with an incomplete brown basal ring. Fore femur with 4 strong pv and 6 pd, ctenidium with 9 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. 2 ) slightly yellow, only with a pale brown stripe on dm-cu; subcostal cell hyaline; 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 2.3 mm: 0.6 mm: 0.4 mm; r-m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1.4 mm: 1.9 mm; ultimate section of CuA1 about 1/7 of penultimate. Halter pale yellow.

Abdomen yellow with sparse silvery white pollen; tergite 2 with a pale brown median spot and a pair of blackish brown lateral bands; tergites 3–5 each with a black posterior band, and a black triangular median spot confluent with a black posterior band; tergite 6 with a small brown median spot. Male genitalia ( Figs. 17–21 ): protandrium circular; epandrium nearly V–shaped in posterior view, surstylus consisting of a broad hairy digitiform process and a narrow curved bar–like process; hypandrium with a narrow claviform ventral process, hypandrial apodeme distinct; gonopod columniform; aedeagus consisting of a pair of dorsal sclerites, basally with a small lateral concavity and a pair of acuate lateral processes and a pair of furcated dorsoapical processes constricted subapically in ventral view; aedeagal apodeme geniculate in lateral view, longer than aedeagus.

FEMALE. Unknown.

Type material. Holotype 3 ( CAUC), CHINA, Hainan Province: Changjiang, Bawangling National Nature Reserve, Donger station (1000 m), 24. V. 2007, Kuiyan Zhang. Paratypes: CHINA, Hainan Province: 1 3 ( CAUC), Ledong, Jianfengling National Nature Reserve, Jianfeng town (800 m), 20. V. 2006, Hui Dong; 1 3 ( CAUC), Ledong, Jianfengling National Nature Reserve, Sanfenqu (800 m), 11. V. 2007, Junhua Zhang.

Distribution. China (Hainan).

Remarks. The new species is somewhat similar to Homoneura (Homoneura) beckeri Kertész from Singapore in the following characters: face with a pair of blackish brown median spot and parafacial brown to blackish brown, wing with a pale brown stripe on dm-cu, abdominal tergite 6 yellow with a small brown median spot; gonopod columniform. But it can be separated from the latter by the antennal 1st flagellomere being black; the surstylus being consisting of a broad hairy digitiform process and a narrow curved bar–like process, the aedeagus having a pair of acuate lateral processes and a pair of furcated dorsoapical processes constricted subapically in ventral view. In H. (H.) beckeri , the antennal 1st flagellomere is yellow except dark at the tip; the surstylus has a claw–like process; the aedeagus has a pair of lateral teeth and many ventroapical teeth without furcated dorsoapical processes ( Sasakawa 1992).

Etymology. Latin, columaria, meaning columniform, referring to the gonopod being columniform; a feminine adjective.

Figures

FIGURES 1 – 11. Wing. 1. Homoneura (Homoneura) apicomata sp. nov.; 2. H. (H.) columnaria sp. nov.; 3. H. (H.) convergens sp. nov.; 4. H. (H.) flavida sp. nov.; 5. H. (H.) latissima sp. nov.; 6. H. (H.) nigritarsis sp. nov.; 7. H. (H.) occipitalis Malloch; 8. H. (H.) semicircularis sp. nov.; 9. H. (H.) tortifurcata sp. nov.; 10. H. (H.) yinggelingica sp. nov.; 11. H. (H.) zhangae sp. nov..

FIGURES 17 – 21. Homoneura (Homoneura) columnaria sp. nov. Male. 17. epandrium, lateral view; 18. protandrium, anterior view; 19. epandrium, posterior view; 20. aedeagal complex, ventral view; 21. aedeagal complex, lateral view. Scale 0.1 mm.