Homoneura (Homoneura) yangi, Gao & Yang, 2005

Gao, Caixia & Yang, Ding, 2005, Notes on the genus Homoneura from Guizhou, China (Diptera: Lauxaniidae), Zootaxa 1010 (1), pp. 15-24 : 22-23

Homoneura (Homoneura) yangi sp. nov.

( Figs. 19–24 )

Body length 5.3–6.4 mm (male), 5.3–6.1 mm (female); wing length 5.7–7.1 mm (male), 5.3–7.3 mm (female).

Head yellow. Frons about as long as wide and parallel­sided; ocellar triangle with brown edge; ocellar bristle developed, longer than anterior fronto­orbital bristle; face without spots; gena about 1/4 height of eye. Antenna yellow; 1 st flagellomere yellowish, 2 times as long as wide; arista black except yellow base, with longest hairs as long as 1/2 width of 1 st flagellomere. Proboscis yellow, with black and yellow hairs; palpus yellow, with black hairs.

Thorax yellow. 0+3 dc (anteriormost dc clearly behind transverse scutal suture), acr in 6 regular rows and equal in length, prsc about as long as anteriormost dc. Legs yellow. Fore femur with 6 posterior ventral bristles, 6 posterior dorsal bristles, and ctenidium with 1416 short bristles. Mid femur with 6 anterior bristles; mid tibia with 1 preapical anterior dorsal bristle and 3 apicoventral spurs. Hind trochanter and femur without secondary characters. Wing ( Fig. 19 ) pale yellow, dark on apex of subcostal cell, apices of R 2+3, R 4+5 and M 1, basal portion of R 4+5 beyond crossvein r­m, and on dm­cu; costa with 2nd, 3rd and 4th sections in proportion of 5:1.8:1.2; crossvein r­m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 3.2:2.8; ultimate section of CuA 1 about 1/8 of penultimate. Halter yellow.

Abdomen yellow. Male sternite 5 with concave distal border. Genitalia (male) ( Figs 20–24 ): Protandrium semicircular, 7th spiracle without surrounding setulae; surstylus basalyy fused with epandrium, apically furcate with an outer and an inner processes; hypandrium without distinct apodemes, gonopod long and pointed apically; aedeagus long, pointed apically, with narrow apical incision.

Type material. Holotype male deposited in CAU, Guizhou: Fanjingshan Mountain (27°55’N, 108°41’E) (21002200 m), 2002. V. 31, Ding Yang . Paratypes 15 males 10 females, same as holotype; 3 males 4 females, Guizhou: Fanjingshan Mountain (27°55«N, 108°41’E) (18002200 m), 2002. VI. 1, Ding Yang .

Remarks. The new species is somewhat similar to Homoneura (Homoneura) grandis ( Kertész, 1915) from Taiwan, but can be easily separated from the latter by the surstylus with the pointed tip. In grandis , the surstylus is rounded at tip ( Malloch 1929).

Etymology. The species is named after Prof. Maofa Yang.

Distribution. China (Guizhou).

Figures

FIGURES 19–24. Homoneura yangi, sp. nov., male. 19. Wing; 20. epandrium and protandrium, lateral view; 21. protandrium, anterior view; 22. epandrium, posterior view; 23. aedeagal complex, lateral view; 24. aedeagal complex, posterior view.