Dicraeus nartshukae Kanmiya, 1971

Liu, Xiaoyan, Yang, Ding & Nartshuk, Emilia P., 2019, New species and records of Dicraeus Loew, 1873 from China (Diptera: Chloropidae), Zootaxa 4554 (2), pp. 351-370 : 364

Dicraeus nartshukae Kanmiya, 1971

Figs 8 , 34 , 40

Dicraeus flavipes Nartshuk nec Duda—misidentification. 1963: 108.

Dicraeus nartshukae Kanmiya, 1971: 169 . Type locality: Japan.

Description. Head brown ( Fig. 8 ), 0.9 times as long as high in profile; face yellow; frons blackish brown with distal 1/3 yellow, as long as wide; gena yellow, broad, 0.5 times as wide as first flagellomere. Parafacial yellow; ocellar triangle smooth, shiny, distal 1/3 yellow, reaching anterior margin of frons, with pointed apex. Antenna yellow except for dorsal 1/3 of first flagellomere brown; first flagellomere 0.8 times as long as wide; arista brown with short brown pubescence. Proboscis and palpus yellow. Scutum black, 1.1 times as long as wide. Thoracic pleuron shiny brown with a longitudinal yellow stripe running from posterior angle of postpronotal lobe to wing base; propleuron yellowish; anterioventral margins of anepisternum and katepisternum black; posterior portion of katepisternum and anterior portion of meron yellow. Scutellum brown, 0.6 times as long as wide. Legs yellow except for fore tarsomeres 2–5, mid and hind tarsomeres 4–5 blackish brown. Wing hyaline, 2.6 times as long as wide; veins brown. Relative lengths of 2nd: 3rd: 4th costal sections = 5.4: 1.4: 1. Halter pale yellow. Abdomen brown except for tergite 1 yellow and tergites 2–5 yellow distally. Male genitalia ( Figs. 34 , 40 ): Epandrium yellow with many long setulae; cercus developed, 1.5 times wider than long in lateral view; surstylus slightly shorter than epandrium, nearly parallel-sided, round distally in lateral view, some thickened setae on inner side of lateral and distal parts.

Female. External characteristics similar to male.

Specimens examined. 3 ♂♂, CHINA, Sichuan, Emeishan Mountain, Linggongli , 5. VII. 2010, Tao Li Leg. ( CAU) (photo and abdomen dissected). All specimens were stored in 75% ethanol .

Distribution. China (Sichuan); Japan, Far East of Russia (Kamchatka, Sakhalin, Kuril Is.).

Remarks. The new species is somewhat similar to D. flavipes Duda, 1930 , but can be separated from the latter by the gena broad, 0.3–0.4 times as deep as eye in profile; palpus yellow; surstylus nearly parallel-sided, round distally in lateral view. In D. flavipes , the gena is 0.25 times as deep as eye in profile; the palpus is largely black; and the surstylus is clavated in lateral view ( Kanmiya 1971). The species is distributed to the North of Kamchatka and Island Karaginsky, host plant Leymus mollis ( Nartshuk & Khruleva, 2010) .

Figures

FIGURES 6–11. Dicraeus species, habitus. 6 D. fuscipennis Kanmiya; 7 D. malaise Nartshuk; 8 D. nartshukae Kanmiya; 9 D. orientalis Becker; 10 D. Phyllostachyus Kanmiya; 11 D. rossicus Stackelberg. Scale bar = 1 mm.

FIGURES 32–37. Dicraeus species, male. epandrium, posterior view. 32 D. fuscipennis Kanmiya; 33 D. malaise Nartshuk; 34 D. nartshukae Kanmiya; 35 D. orientalis Becker; 36 D. phyllostachyus Kanmiya; 37 D. rossicus Stackelberg. Scale bar = 0.1 mm.

FIGURES 38–43. Dicraeus species, male. epandrium, lateral view. 38 D. fuscipennis Kanmiya; 39 D. malaise Nartshuk; 40 D. nartshukae Kanmiya; 41 D. orientalis Becker; 42 D. phyllostachyus Kanmiya; 43 D. rossicus Stackelberg. Scale bar = 0.1 mm.