Homoneura (Homoneura) convergens, 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 : 8-10

Homoneura (Homoneura) convergens sp. nov.

( Figs. 3 , 22–26 )

Diagnosis. Face with two elliptical brown spots, extending to inner margin of parafacial. Antennal scape and pedicel black, 1st flagellomere and arista broken. Mesoscutum with a pair of brown median stripes. Wing with a pale brown elliptical spot on dm-cu. Abdomen pale yellow with sparse silvery white pollen; tergite 2 with a black median spot, tergites 3–4 each with a black posterior band, tergite 5 with a black triangular median spot and tergite 6 with a black elliptical spot.

Description. MALE. Body length 4.0 mm, wing length 3.9 mm.

Head pale yellow. Face pale yellow, with two elliptical brown spots, extending to inner margin of parafacial. Frons yellow, about as long as wide and parallel–sided, with two narrow blackish grayish stripes along or rows and a narrow brown triangular median stripe, extending to ocellar triangle; ocellar triangle grayish brown; oc broken, anterior or shorter than posterior or. Gena about 1/7 height of eye. Occiput with a wide grayish brown stripe confluent with ocellar triangle. Antennal scape and pedicel black, 1st flagellomere and arista broken in examined specimens. Proboscis yellowish brown, with yellowish or blackish hairs; palpus pale yellow with blackish hairs.

Thorax blackish brown with whitish gray pollen. Mesoscutum with a pair of brown median stripes, two short brownish yellow basal stripes along dc rows terminated before transverse scutal suture and a brownish yellow spot behind postpronotum. 0+3 dc (anterior dc clearly behind transverse scutal suture), acr in 6 rows; prsc absent. Anepisternum and katepisternum pale yellow, with whitish gray pollen and a large grayish black spot. Scutellum blackish brown except yellow apical margin, with whitish gray pollen. Legs mostly pale yellow, but pale brown at tip of mid femur, all tarsi dark yellow except tarsomere 5 blackish brown on apical 1/3; hind tibia with an incomplete brown basal ring. Fore femur with 5 pv (3 strong) and 6 pd, ctenidium with 11 short bristles; fore tibia with 1 long preapical ad and 1 short apv. Mid femur with 5 a and 1 apv; mid tibia with 1 strong preapical ad and 3 apv. Hind femur with 1 preapical ad; hind tibia with 1 weak preapical ad and 1 short apv. Wing ( Fig. 3 ) hyaline, with a narrow 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 2.0 mm: 0.6 mm: 0.4 mm; r-m at middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1.3 mm: 1.7 mm; ultimate section of CuA1 about 1/7 of penultimate. Halter pale yellow.

Abdomen pale yellow with sparse silvery white pollen; tergite 2 with a black median spot and tergites 3–4 each with a black posterior band, tergite 5 with a black triangular median spot and tergite 6 with a black elliptical spot. Male genitalia ( Figs. 22–26 ): protandrium circular with a slender ventral process; epandrium broad, with a subapical concavity on anterior ventral margin in lateral view; surstylus consisting of a wide incurved knife–like process and a narrow curved coniform process in lateral view but two wide incurved knife–like processes convergent in posterior view; hypandrium with a pair of bar–like ventral processes, hypandrial apodeme distinct; gonopod short coniform in ventral view; aedeagus consisting of a basal anterior sclerite with a pair of triangular lateral processes, a pair of basally furcated dorsal sclerites convergent at middle and a pair of hammer–like dorsal processes in ventral view.

FEMALE. Unknown.

Type material. Holotype 3 ( CAUC), CHINA, Hainan Province: Changjiang, Bawangling National Nature Reserve, Linchang (1000 m), 26. V. 2007, Junhua Zhang.

Distribution. China (Hainan).

Remarks. The new species is somewhat similar to Homoneura (Homoneura) columnaria sp. nov. from China (Hainan) in the following characters: face with a pair of brown elliptical median spots (sometimes two spots slightly confluent); abdominal tergites 2 and 6 each with a brown of black median spot and tergites 3–4 each with a black posterior band; surstylus consisting of two processes. But it can be separated from the latter by the mesoscutum having a pair of brown median stripes, the tergite 5 having a black triangular median spot, the protandrium having a ventral process, and the aedeagus having a pair of hammar–like dorsal processes but no lateral processes in ventral view. In H. (H.) columnaria , the mesoscutum has no brown stripes, the tergite 5 has a black triangular median spot confluent with the black transverse band, the protandrium has no ventral process and the aedeagus has a pair of acuate lateral processes and a pair of furcated dorsoapical processes constricted subapically in ventral view.

Etymology. Latin, convergens , meaning convergent, referring to the aedeagus having two wide incurved knife–like processes convergent in posterior view; 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 22 – 26. Homoneura (Homoneura) convergens sp. nov. Male. 22. protandrium and epandrium, lateral view; 23. protandrium, anterior view; 24. epandrial complex, posterior view; 25. aedeagal complex, ventral view; 26. aedeagal complex, lateral view. Scale 0.1 mm.