Dicraeus phyllostachyus 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 : 366

Dicraeus phyllostachyus Kanmiya, 1971

Figs 10 , 36 , 42

Dicraeus phyllostachyus Kanmiya, 1971: 166 . Type locality: Japan.

Description. Head brown ( Fig. 10 ), 0.8 times as long as high in profile; distal 1/4 of frons yellow, frons as long as wide; gena yellow, broad, 0.7 times as wide as first flagellomere; ocellar triangle with pruinescence, distal 1/4 yellow, reaching anterior margin of frons, with pointed apex. Antenna yellow except for dorsal portion of first flagellomere brown; first flagellomere as long as wide; arista brown with short brown pubescence. Proboscis yellow, palpus yellowish brown. Scutum black with brownish pruinescence, 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; ventral 1/2 of katepisternum black. Scutellum brown, 0.6 times as long as wide. Legs yellow except for hind femur and tibia brownish yellow on anterior surface, tarsomeres 4–5 brown. Wing hyaline, 2.6 times as long as wide; veins brown. Relative lengths of 2nd: 3rd: 4th costal sections = 6.6: 2: 1. Halter pale yellow. Abdomen brown except for tergite 1 yellow but brown laterally. Male genitalia ( Figs. 36 , 42 ): Epandrium brown, height 1.7 times width in profile; cercus broad, as long as wide; surstylus much shorter than epandrium in profile, gently broadened basally, suddenly narrowed at middle and curved in a S-shaped form, with some thick setae on inside of distal portion.

Female. External characteristics similar to male.

Specimens examined. 1 ♀, CHINA, Fujian, Wuyishan Mountain, Dazhulan, 27. X. 1974, Fasheng Li Leg. ( CAU); 2 66, CHINA, Sichuan, Emeishan Mountain , Leidongping-Jinding , 11. VIII. 2009, JunchaoWang Leg. ( CAU) (photo and abdomen dissected); 1 6, CHINA, Shaanxi, Zhouzhi , Houzhenzi , 15. V. 2009, Maoling Sheng Leg. ( HZAU); 1 6, CHINA, Shaanxi, Zhouzhi , Houzhenzi , 16. VIII. 2014, Xuankun Li Leg. ( HZAU). All specimens were stored in 75% ethanol

Distribution. China (Fujian, Shaanxi, Sichuan); Japan.

Remarks. The new species is somewhat similar to D. orientalis Becker, 1911 , but can be separated from the latter by the ocellar triangle reaching the anterior margin of frons, antenna yellow except for the first flagellomere partly yellow, and surstylus gently broadened basally, suddenly narrowed at middle and curved in a S-like form. In D. orientalis , the ocellar triangle reaches anterior 3/4 of frons; the antenna is entirely black; and the surstylus has two lobes, the dorsal one short and broadened, the ventral one elongate and slender ( Kanmiya 1971).

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.