Chlorops flavipalpus, Cui, Yusi & Yang, Ding, 2011

Cui, Yusi & Yang, Ding, 2011, Species of Chlorops Meigen from Palaearctic China (Diptera, Chloropidae), Zootaxa 2987, pp. 18-30 : 19-21

Chlorops flavipalpus sp. nov.

( Figs. 1–5 )

Diagnosis. Ocellar triangle smooth, yellow, with a black spot in leaf shape covering most part of triangle and contended with ocellar tubercle, and with a medial sulcus attending to anterior margin of frons, yellow anteriorly and black posteriorly; ocellar tubercle black. 1st antennal segment yellow, 2nd antennal segment brown, 3rd antennal segment nearly rounded, black; arista black, with yellow basal segment. Anteroventral region of anepisternum with a black spot, and covered with tiny yellow setulae.

Description. Male. Body length 2.5–3.0 mm. Wing length 2.0– 2.5 mm.

Head yellow, about 0.8 times as long as high; frons about 0.85 times as wide as long, projecting only slightly in front of eye; gena broad, about 1.25 times as high as 3rd antennal segment, vibrissal angle obtuse. Ocellar triangle smooth, yellow, with a black spot in leaf shape covering most part of triangle and contended with ocellar tubercle, and with a medial sulcus attending to anterior margin of frons, yellow anteriorly and black posteriorly; ocellar tubercle black. Setae on head black, setulae yellow. Oc proclinate and divergent; vte and vti developed. Eyes bare. 1st antennal segment yellow, 2nd antennal segment brown, 3rd antennal segment nearly rounded, black; arista black, with yellow basal segment. Proboscis yellow with yellow setulae; palpus yellow with pale setulae.

Thorax nearly as wide as head, yellow. Thoracic pleuron shinning yellow except for postpronotum with a brownish spot; anteroventral region of anepisternum with a black spot, and covered with tiny yellow setulae; katepisternum with black lower portion; katepimeron with a black spot on lower margin, covered with tiny pale setulae; postnotum black; scutum about 1.1 times as long as wide, covered with short setulae and pale pollen, with 5 black stripes; scutellum yellow, about 1.5 times as wide as long. Setae and setulae on thorax black. Legs long and thin, yellow, except for fore-tarsomeres dark brown, mid- and hind-tarsomeres 4–5 dark brown. Wing hyaline, veins brown. Relative lengths of costal sections 2nd: 3rd: 4th = 15: 23: 15. Squama yellow with yellow setulae. Halteres bright yellow.

Abdomen yellow. Each tergum with brown posterior margin. Setulae on abdomen black.

Male genitalia ( Figs. 3–5 ): epandrium yellow, with black setulae; surstylus short, less than 0.5 times as high as epandrium, with posterior region short finger-like and curved backward, dark; mesolobus with 3 pairs of setulae; hypandrium relatively narrow in lateral view; pregonite shorter than gonostylus; gonostylus with tapered posterior region, and with 4 setulae in 1 row on each one; distiphallus shorter than 0.5 times as long as gonostylus.

Female. Unknown.

Type material. Holotype 3, CHINA: Beijing: Yanqing, 19. VI. 2005, Xingyue Liu. Paratypes 2 3, Ningxia: Liupanshan, 30. VII. 2007, Gang Yao.

Distribution. China (Beijing, Ningxia).

Remarks. The new species is somewhat similar to Chlorops zernyi Duda, 1932 from Europe, Japan, and west & central Siberia in the ocellar triangle smooth, yellow, with a black spot in leaf shape covering the most part of the triangle and contended with the ocellar tubercle; and the shape of the gonostylus. But it can be separated from the latter by the 2nd antennal segment brown; the arista black; the gena broad, about 1.25 times as high as the 3rd antennal segment; and the palpus yellow entirely. In C. zernyi Duda , the 2nd antennal segment is yellow; the arista is white; the gena is a little narrower than high of the 3rd antennal segment; and the palpus is yellow, with black tip ( Kanmiya, 1978).

Etymology. The specific name refers to the yellow palpus of the new species.

Figures

FIGURES 1 – 5. Chlorops flavipalpus sp. nov. Male. 1. Head, dorsal view; 2. antenna, lateral view; 3. epandrium, posterior view; 4. epandrium, lateral view; 5. hypandrium and phallic complex, ventral view. Scale bar of 1 – 2 = 0.50 mm, 3 – 5 = 0.25 mm.