Homoneura (Homoneura) beijingensis Gao et Yang

G, Junchao Wan, Gao, Caixia & Yang, Ding, 2012, Three new species of the Homoneura (Homoneura) henanensis species group (Diptera, Lauxaniidae), with a key to Chinese species, Zootaxa 3262, pp. 35-45 : 36-39

Homoneura (Homoneura) beijingensis Gao et Yang , sp. nov.

( Figs. 1–11 )

Diagnosis. acr in 6–8 rows. Apical spots on R2+3, R4+5 and M1 extend to extreme vein tip, apical spots on R4+5 and M1 partly confluent, separated from apical spot on R2+3; apical spot on R2+3 with basal edge beyond dm-cu, apical spot on R4+5 with basal edge beyond that on M1; a spot slightly constricted at middle on dm-cu; apex of subcostal cell brownish. Male surstylus blunt, with a small process and a dorsally oriented long, sharp, interior process preapically.

Description. MALE. Body length 4.7–6.1 mm, wing length 4.6–5.7 mm. FEMALE. Body length 4.8–5.9 mm, wing length 4.8–5.7 mm.

Head ( Fig. 2 ) yellow. Frons about as long as wide and parallel-sided; ocellar triangle without spot; oc developed, longer than anterior or and slightly shorter than posterior or; face without spots; gena about 1/7 height of eye. Antenna yellow, 1st flagellomere 2 times as long as wide; arista dark brown except yellow brownish at base, with longest hairs about as long as the height of 1st flagellomere. Proboscis yellow, with yellowish hairs and slightly dark hairs; palpus yellow, with dark hairs.

Thorax ( Fig. 3 ) yellow. Mesoscutum with 1 sa, 1 ia, 0+3 dc (anteriormost dc clearly behind transverse scutal suture), acr in 6–8 rows, uniformly short hair-like; prsc about as long as anteriormost dc. Mesopleuron with 1 bristle on anepisternum and 2 bristles on katepisternum. Legs yellow. Fore femur with 3 pv and 5 pd, and ctenidium with 10 short bristles; fore tibia with 1 long preapical ad and 1 short apv. Mid femur with 6 a and 1 app; mid tibia with 1 preapical ad and 3 apv. Hind femur with a row of weak av and 1 preapical ad; hind tibia with 1 weak preapical ad and 1 short apv. Wing ( Fig. 4 ) tinged yellowish, apical spots on R2+3, R4+5 and M1 extending to extreme vein tip, apical spots on R4+5 and M1 partly confluent, separated from apical spot on R2+3; apical spot on R2+3 with basal edge beyond dm-cu, apical spot on R4+5 with basal edge beyond that on M1; a spot slightly constricted at middle on dm-cu; apex of subcostal cell brownish; 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 2.5 mm: 0.75 mm: 0.5 mm; r-m before middle of cell dm; ultimate and penultimate sections of M 1 in proportion of 1.7 mm: 2.6 mm; ultimate section of CuA1 about 1/6 of penultimate. Halter yellow.

Abdomen ( Fig. 5 ) yellow; tergites 2–5 with brownish posterior margin. Male genitalia ( Figs. 6–11 ): Protandrium circular with a large process anteriorly; surstylus blunt, with a dorsally oriented long, sharp, interior process preapically; hypandrium H-shaped, hypandrial apodemes distinct, with lateral margin irregular; gonopod with a trifurcated process and a coniform process; aedeagus with a small lateral process; aedeagal apodeme slightly shorter than aedeagus.

Type material. Holotype male ( CAU), CHINA, Beijing: Mentougou, Xiaolongmen Forest Park (N 39°56', E 116°05', 1100 m), 9. VIII. 2002, Shuwen An. Paratypes: CHINA, Beijing: 1 male, 2 females ( CAU), same place as holotype, 10. VIII. 2002, Shuwen An; 1 female ( CAU), same place as holotype, 10. VIII. 2002, Caixia Gao; 1 male 1 female ( CAU), same place as holotype, 7. IX. 2008, Li Shi; 3 males 1 female ( CAU), same place as holotype, 14. VIII. 2009, Hui Yu; 42 males 26 females ( CAU), Mentougou, Liyuanling (N 39°56', E 116°05', 1070 m), 22–25. IX. 1999, Ding Yang.

Distribution. China (Beijing).

Remarks. This species is somewhat similar to H. (H.) henanensis from Henan. But it can be separated from the latter by the following fearures: body length 4.7–6.1 mm; fore femur with 3–4 pv; hypandrial apodeme visible; aedeagal apodeme more than half length of aedeagus. In henanensis , the body length is 6.8–7.0 mm; the fore femur has 2 pv; the hypandrium is narrowly banded; the aedeagal apodeme is obviously less than half length of aedeagus ( Yang, Zhu and Hu, 1999).

Etymology. The species is named after the type locality Beijing.

Figures

FIGURES 1 – 6. Homoneura (Homoneura) beijingensis sp. nov. Male. 1. Habitus, lateral view; 2. head, dorsal view; 3. thorax, dorsal view; 4. wing; 5. abdomen, dorsal view; 6. male genitalia, lateral view.

FIGURES 7 – 11. Homoneura (Homoneura) beijingensis sp. nov. Male. 7. protandrium and epandrium, lateral view; 8. protandrium, anterior view; 9. epandrium, posterior view; 10. aedeagal complex, lateral view; 11. aedeagal complex, ventral view. a = aedeagus, aa = aedeagal apodeme, c = cercus, e = epandrium, h = hypandrium, s = surstylus.