Tipula (Acutipula) gansuensis Yang and Yang, 1995

Li, Yan & Yang, Ding, 2010, Species of the subgenus Acutipula Alexander from Henan, east-central China (Diptera, Tipulidae), Zootaxa 2648, pp. 32-44 : 38-40

Tipula (Acutipula) gansuensis Yang and Yang, 1995

( Figs. 3 , 14–17 )

Tipula (Acutipula) gansuensis Yang and Yang, 1995: 333 . Type locality: China: Gansu (Tewo).

Diagnosis. Sternite 8 with posterior margin not produced, with abundant long yellow setae near posterior margin. Clasper of gonostylus with basal beak long and acute at tip; outer beak produced apically, extended into a sharp point, with few long erect yellow setae; apex of clasper of gonostylus with a line of long erect coarse yellow setae.

Description. Male. Body length 14–19 mm, wing 19–21 mm.

Head. Rostrum dark reddish brown, with slender nasus. Vertex and occiput blackish brown. Orbits paler. Pollen on head grayish white. Hairs on head black. Antenna nearly 5 mm long; scape and pedicel brownish yellow; flagellum with first segment brownish yellow, others blackish brown, each basally slightly enlarged, verticils nearly as long as corresponding segments. Proboscis dark reddish brown, with apex blackish brown; palpus dark brown except last one or two segments yellowish, all with black hairs.

Thorax. General brown or reddish brown with grayish white pollen. Pronotum brown; prescutum grayish brown, with four dark brown longitudinal stripes, lateral ones shorter and wider, either side with sparse hairs; anterior and lateral margins of prescutum dark reddish brown; median area of V-shaped transverse mesonotal suture dark reddish brown; scutum grayish brown, each lobe with two inconspicuous dark brown areas, hairs on lateral margins; scutellum grayish brown, with posterior margin dark reddish brown; mediotergite yellowish brown. Pleura yellow, laterotergite reddish brown with yellowish pollen. Hairs on thorax yellowish brown. All coxae and trochanters yellow with dense yellow hairs; femora brownish yellow with tips dark brown; tibiae yellowish brown with tips dark brown; tarsi yellowish brown except last three segments dark brown; tibial spurs 1–2–2; claws black, each with a reddish brown basal tooth and a black median tooth. Hairs on legs black. Wing ( Fig. 3 ) grayish yellow, almost transparent. Cell C yellowish brown; cell Sc and stigma brown; area from stigma to cell dm along cord white; cell bm with an inconspicuous light gray cloud at tip and white area inside; cell CuA2 with a very light gray spot at middle and white areas at both sides of the spot. Veins dark brown. Halter brown.

Abdomen. Tergites 1–5 obscure yellow, with light brown longitudinal stripes near lateral margin; sternites 1–5 yellow. Segments 6–9 blackish brown. Hairs black on tergites, yellow on sternites.

Hypopygium ( Figs. 14–17 ). Tergite 9 ( Fig. 17 ) with median lobe basally about 1/3 width of tergite 9, apically very narrow and compressed, bearing black spicules. Sternite 8 with posterior margin not produced, but with abundant long yellow setae near posterior margin. Lobe of gonostylus ( Figs. 16 -a, 16-b, 16-c) flattened, with apex oblique or curvedly constricted, rarely very acute. Clasper of gonostylus ( Figs. 15 -a, 15- b) with basal beak long and acute at tip; outer beak produced apically, extended into a sharp point, with few long erect yellow setae; apex of clasper of gonostylus with a line of long erect coarse yellow setae.

Female. Unknown.

Specimens examined. Holotype male, Gansu: Tewo, Lazikou (( 34° 06' N, 103° 54' E; 1700 m), 1980. VIII. 12, Jikun Yang. Paratypes: same data as holotype, 3 males. Henan: Luoyang, Songxian, Baiyun Mountain (33° 40' N, 111° 52' E), 2002. VII. 24 (light trap), Ding Yang, 1 male; same locality (1500 m), 2008. VIII. 14 (light trap), Ding Yang, 80 males; 2008. VIII. 15 (light trap), Kuiyan Zhang, 4 males; 2008. VIII. 17 (light trap), Kuiyan Zhang, 3 males. Henan: Luoyang, Yiyang, Huaguo Mountain (34° 20' N, 111° 53' E), Shan Huo: 2006. VII. 27, 1 male; 2006. VIII. 2, 3 males; 2006. VIII. 3, 1 male; 2006. VIII. 4, 1 male.

Distribution. China (Henan, Gansu).

Remarks. This species is clearly different from other regional species of the subgenus by the distinctive clasper of gonostylus, especially the shape of the outer beak, with only few long erect setae near the tip and a line of few long erect setae on the apex of clasper of gonostylus.

Figures

FIGURES 1 – 5. Wings (male). 1. Tipula (Acutipula) pseudacanthophora Yang and Yang, 1993; 2. Tipula (Acutipula) pseudocockerelliana Yang and Yang, 1995; 3. Tipula (Acutipula) gansuensis Yang and Yang, 1995; 4. Tipula (Acutipula) henanensis sp. nov.; 5. Tipula (Acutipula) buboda Yang and Yang, 1993.

FIGURES 14 – 17. Tipula (Acutipula) gansuensis Yang and Yang, 1995 (male). 14. Hypopygium, lateral view; 15 - a, 15 - b. clasper of gonostylus, lateral view; 16 - a, 16 - b, 16 - c. lobe of gonostylus, lateral view; 17. ninth tergite, dorsal view.