Chromatopterum Becker, 1910

Liu, Xiaoyan, Nartshuk, Emilia P. & Yang, Ding, 2017, Chromatopterum (Diptera, Chloropidae), a newly recorded genus from China, and description of two new species, Zootaxa 4306 (2), pp. 279-286 : 280

Key to world species of genus Chromatopterum Becker

(modified from Deeming 1981)

1. Wing hyaline with a fuscous costal band ending in an apical spot ( Figs 1, 2 , 10, 11 )................................. 2

- Wing fuscous with small hyaline areas towards its base........................................................7

2. Scutum black or brown with black stripes.................................................................. 3

- Scutum yellow with black stripes.........................................................................6

3. Scutum entirely black; halter entirely black or only knob of halter ivory white.....................................4

- Scutum brown with black stripes almost indistinct; halter entirely pale yellow......................................5

4. Scutellum entirely black; knob of halter ivory white.—Afrotropical ( Kenya, Ruanda, Zair)..... .. C. delicatum Becker, 1910

- Scutellum black except for dark yellow centrally on disc and apically; halter entirely black.—Afrotropical (Nigeria).................................................................................... C. dimidiatum Deeming, 1981

5. Femora yellow except for middle 1/2 of fore femur brown; apical spot of wing separated by a narrow space from apex of costal band in marginal cell.—Oriental ( China: Hainan, Yunnan)................................. .. C. brevicercum sp. nov.

- Femora brown except for distal portions yellow; apical spot of wing separated by a wide space from apex of costal band in marginal cell.—Oriental ( China: Yunnan).............................................. C. longiclavatum sp. nov.

6. Ocellar triangle yellow except for anterior portion reddish with a black ocellar spot; scutellum entirely yellow.—New Guinea (PNG)......................................................................... C. pubescens Becker, 1911

- Ocellar triangle black except for posterolateral sides narrowly yellow; scutellum blackish brown except for brownish yellow posterodorsally.—Oriental (Borneo Sabah, Java, Krakatau).................. C. nusantarum Kanmiya et Yukawa, 1985

7. Scutellum black.—Afrotropical (Ghana)........................................... C. ghanaensis Deeming, 1981

- Scutellum largely yellow or ivory white....................................................................8

8. Face ivory white; scutellum conical.—Afrotropical (Nigeria)............................ .. C. mirabilis Deeming, 1981

- Face dark; scutellum short and convex on disc...............................................................9

9. Fore coxa bright yellow.—Afrotropical ( Uganda, Cameroun)............................ C. suffusum Sabrosky, 1951

- Fore coxa black.—Afrotropical ( Ivory Coast, Nigeria)................................... C. linguatum Séguy, 1957

Figures

FIGURES 1 – 2. Chromatopterum brevicercum sp. nov. male. habitus, 1 dorsal view; 2 lateral view. Scale bar = 0.5 mm.

FIGURES 10 – 11. Chromatopterum longiclavatum sp. nov. male. habitus, 10 dorsal view; 11 lateral view. Scale bar = 0.5 mm.